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    Table of Contents
  1. Intro
  2. Design
    1. Style
    2. Comfort
    3. Controls
    4. Stability
    5. Portability
    6. Case
    7. Build Quality
    8. Breathability
    9. Cable
    10. Front
    11. Angled
    12. Side
    13. Rear
    14. Top
  3. Sound
    1. Bass
    2. Mid
    3. Treble
    4. Frequency Response Consistency
    5. Soundstage
    6. Imaging
    7. Total Harmonic Distortion
  4. Isolation
    1. Noise Isolation
    2. Leakage
  5. Active Features
    1. Wireless
    2. Battery
    3. App Support
  6. In the box
  7. Conclusion
  8. Q&A
Reviewed on Jun 09, 2017 , Marc Henney, Yannick Khong

Sennheiser RS 165
HEADPHONES REVIEW

Usage Ratings
6.5Mixed Usage
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What it is This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
7.4Critical Listening
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What it is The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
6.2Commute/Travel
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What it is How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
Score components:
5.4Sports/Fitness
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What it is How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
Score components:
6.9Office
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What it is How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
Score components:
Type : Over-ear
Enclosure : Closed-Back
Wireless : Yes
Noise-Cancelling : No
Mic : No
Transducer : Dynamic

The Sennheiser RS 165 are decent home theater headphones with a good sound quality. They have a transmitter stand that communicates with the headphones via radio frequency and provides an almost lag-less wireless connection for watching videos. Unfortunately, they're too bulky and do not block enough noise to be versatile for anything else. Also, RF has a few disadvantages especially in terms of range.

Test Results
Design 5.9
Sound 7.4
Isolation 5.7
Active Features 6.8
Pros
  • Low latency connection.
  • Well-balanced audio reproduction.
Cons
  • Poor isolation.
  • Limited range and usability.

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5.9

Design

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Score components:
Sennheiser RS 165 Design Picture

The RS 165 are a bit bulky and not meant for sports or outdoor use, but they're comfortable and easy-to-use. The ear cups are large and roomy, and the headband is flexible and not too tight. They have an above-average build quality, but the ear cups feel kind of cheap when compared to other headphones in their price range. They also put a bit of uneven pressure below your ears that may get uncomfortable during long listening sessions, but it's not that big of an issue.

Style
Sennheiser RS 165 Design Picture 2

The RS 165 come with a TR transmitter stand that also acts as a dock and a charging station for the headphones. This gives them a premium feel when docked but their design doesn't particularly stand out. They're a bit bulky and upon closer inspection, the padding looks a bit cheap. They're not meant for outdoor use so they're not the most fashionable headphones but their simple utilitarian design will work for most.

7.5 Comfort
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What it is: Adjustability and degrees of freedom, pressure, stiffness and weight.
When it matters: When the headphones are going to be used for long durations.
Score components: Subjectively assigned
Sennheiser RS 165 Comfort Picture
Weight : 0.65 lbs
Clamping Force
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What it is: The force that the headphones exert on your head, once you have them on. This is purely a measurement of the force applied, which does not take into account the earpad's surface area and the resulting pressure you will feel, on or around your ears.
When it matters: The tighter the headphones, the more force they put on your head. This can get uncomfortable or cause pain and soreness during long listening sessions.
:
1.1 lbs

The RS 165 have large and spacious ear cups. They're also decently well padded and lightweight for their size. Unfortunately, the pressure they exert around your ears is not properly distributed. So after listening to the RS 165 for a while, you might start feeling a little soreness between your ear lobes and your jaw. It's not painfully uncomfortable but it's not ideal either.

6.4 Controls
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What it is: The control scheme of the headphones, the number of functions provided, button layout and ergonomics as well as the quality of tactile feedback.
When it matters: If you want to control volume, pause your music or make phone calls without directly interacting with your audio device.
Sennheiser RS 165 Controls Picture
Ease of use : Above-average
Feedback : Good
Call/Music Control : No
Volume Control : Yes
Noise Canceling Control : N/A
Talk-Through : N/A
Additional Buttons : Bass Effect

The controls scheme for the RS 165 is good but slightly limited. They don't provide any call/music functions but by design, they're not supposed to. What they provide are good, clicky buttons for volume control and their additional bass effect, which feels responsive and easy-to-use.

5.5 Stability
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What it is: How the headphones are designed to prevent them from slipping off your ears or falling off your head.
When it matters: If you plan on using the headphones while doing sports or other physical activities that requires a lot of movement.
Score components: Subjectively assigned
Sennheiser RS 165 Stability Picture

The RS 165 are just tight enough that they won't move much during casual listening sessions. However, the ear cups are a bit too bulky and sway a lot under physical activity making them too unstable for sports. That and the need for their charging dock to be in range for them to work makes these headphones unideal to go running with. Even if their wireless design prevents them from being yanked from your head because the audio cable got hooked on something.

1.1 Portability
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What it is: The volume of space occupied by the headphones when folded into their most compact format.
When it matters: If you're often on the move and need to carry your headphones in a bag, purse , or pocket.
Score components:
Sennheiser RS 165 Portability Picture
L : 7.6 "
W : 7.6 "
H : 3.9 "
Volume : 225 Cu. Inches
Stand required : Yes

These headphones are quite large and do not fold into a more compact design. This means they're not portable, especially, since you will need the stand too for them actually to work. Being home theater headphones, you most likely won't carry them around on your person, but if you plan to, then you will need a bag.

0 Case
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What it is: The provided carrying options to protect your headphones when transporting them.
When it matters: To prevent damaging your headphones, if you often carry them in your bag or pocket.
Score components: Subjectively assigned
Type : N/A
L : N/A
W : N/A
H : N/A
Volume : N/A

7.0 Build Quality
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What it is: Durability, material quality, cheap/expensive feel.
When it matters: When the headphones are going to be used by multiple users (classes/studios), by children, in tough conditions, on a daily basis, or for exercise.
Score components: Subjectively assigned
Sennheiser RS 165 Build Quality Picture

The build quality for the RS 165 feels decently sturdy but a bit cheap. The headband is moderately flexible and reinforced with a thin metal frame. The ear cups too are decently dense but aren't as durable. The plastic used feels low grade and a bit cheap, so the ear cups might get damaged by a few accidental drops. The padding material also isn't as soft on the skin or as premium as some of the other headphones in the RS 165's price range, which is a little disappointing, especially since you're most likely going to be wearing these headphones for hours if you're watching a movie.

6.7 Breathability
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What it is: How hot the headphones get when you wear them for an extended period of time.
When it matters: If you often have long listening sessions or use your headphones while doing physical activities like running or working out.
Score components:
  • 100% Avg.Temp.Difference
Sennheiser RS 165 Breathability Before Picture Sennheiser RS 165 Breathability After Picture
Avg.Temp.Difference : 4.9 C

Cable
Sennheiser RS 165 Cable Picture
Detachable : Yes
Length : 7 ft
Connection : 1/8" TRS

Comes with a 1/8" TRS audio cable and a power adapter for the TR 165 transmitter.

Front
Angled
Side
Rear
Top
7.4

Sound

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What it is: How accurately the audio is reproduced. The tests are performed with the headphones' most commonly used features enabled (noise-cancelling, wireless, etc.)
Sennheiser RS 165 Frequency Response

The RS 165 are a pair of above-average sounding headphones capable of delivering a lot of Bass, an excellent Mid Range and a good Treble. However, their Bass is prone to inconsistencies and highly dependent on the quality of fit/seal achieved by the user, more than any other headphones we have tested so far. Additionally, due to their closed-back design, they don't have a very open and spacious Soundstage, which is favored for critical listening applications.

8.2 Bass
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What it is: Frequency Response from 20Hz-250Hz
When it matters: When the material is heavy on bass frequencies, such as those of kick drums and bass guitar.
Score components:
Sennheiser RS 165 Bass
Std. Err.
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What it is: The amount of deviation (weighted standard error) in bass frequency response (20Hz-250Hz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) bass performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
2.7 dB
Low-Frequency Extension
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What it is: The lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: Shows how extended the bass is.
Good value: <40Hz
Noticeable difference: 5Hz
:
10 Hz
Low-Bass
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What it is: The average amount of over/under-emphasis in frequency response from 20Hz-60Hz.
When it matters: Kick drums and low frequency effects get their 'thump' from this range. Mostly felt than heard.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
2.71 dB
Bass
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What it is: The average amount of over/under-emphasis in frequency response from 60Hz-120Hz.
When it matters: Melodic bass instruments have most of their fundamental frequencies in this range. This is where the 'body' and 'punch' of the bass sits.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
2.41 dB
High-Bass
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What it is: The average amount of over/under-emphasis in frequency response from 120Hz-250Hz.
When it matters: Most instruments get their warmth and full-ness from this range. When over-emphasized, mixes tend to get muddy and boomy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
3.24 dB

Good Bass Range performance. Low-bass is extended down to 10Hz which is excellent. However, it is hyped by about 3dB, which is going to add excess thump and rumble to the sound. Additionally, the 5dB bump surrounding 100Hz makes the sound of these headphones noticeably boomy and muddy.

8.8 Mid
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What it is: Frequency Response from 250Hz-2KHz
When it matters: When the material is heavy on mid-range frequencies. This is the case for the majority of audio content.
Score components:
Sennheiser RS 165 Mid
Std. Err.
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What it is: The amount of deviation (weighted standard error) in mid frequency response (250Hz-2.5KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) mid performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
1.54 dB
Low-Mid
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What it is: The average amount of over/under-emphasis in frequency response from 250Hz-500Hz.
When it matters: Most instruments have their fundamentals or low harmonics in this range. Over-emphasis in this range sounds boxy. Under-emphasis, thins out the vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.89 dB
Mid
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What it is: The average amount of over/under-emphasis in frequency response from 500Hz-1KHz.
When it matters: This range is occupied mostly by upper harmonics. Over-emphasis sounds forward and honky. Under-emphasis pushes instruments to the back of the mix.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.23 dB
High-Mid
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What it is: The average amount of over/under-emphasis in frequency response from 1KHz-2KHz.
When it matters: Most instruments, especially vocals, get their intensity and clarity from this range. Over-emphasis sounds harsh, under-emphasis sounds weak and distant.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.47 dB

Very good Mid Range performance. The response is consistent and relatively flat, but shows about 3dB of tilt towards the higher frequencies. This makes the sound of these headphones slightly forward, by bringing the vocals/leads slightly to the front of the mix.

7.6 Treble
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What it is: Frequency Response from 2KHz-20KHz
When it matters: When the material is heavy on high-range frequencies, such as voice, cymbals, and any other material where brightness, brilliance and airiness is desired.
Score components:
Sennheiser RS 165 Treble
Std. Err.
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What it is: The amount of deviation (weighted standard error) in treble frequency response (2.5KHz-20KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) treble performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
3.85 dB
Low-Treble
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What it is: The average amount of over/under-emphasis in frequency response from 2KHz-5KHz.
When it matters: Almost all instruments rely on this range for their presence, detail, and articulation. Over-emphasis can sound harsh and painful. Under-emphasis hurts the comprehensibility of vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-3.86 dB
Treble
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What it is: The average amount of over/under emphasis in frequency response from 5KHz-10KHz.
When it matters: This is the sibilance range. Cymbals, vocals, and lead instruments rely on this range for brightness and presence. Over-emphasis sounds piercing and painful, under-emphasis sounds dull and lispy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.89 dB
High-Treble
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What it is: The average amount of over/under-emphasis in frequency response from 10KHz-20KHz.
When it matters: This range gives brilliance and airiness to the sound. Over-emphasis sounds hissy, under-emphasis sounds closed-up and lifeless.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-4.46 dB

Good Treble Range performance. Low-treble has a dip around 4KHz, but because of the narrow width, its negative effects on presence and detail of vocals/leads would be small. The rest of the Range is within good limits and relatively flat and consistent.

5.5 Frequency Response Consistency
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What it is: The amount of deviation of each frequency response pass, from the average frequency response.
When it matters: Shows how consistently the headphones perform after re-positioning them.
Score components:
Sennheiser RS 165 Consistency L Sennheiser RS 165 Consistency R
Avg. Std. Deviation
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What it is: The average amount of deviation in frequency response of 5 re-seats, from the average frequency response.
When it matters: Shows how consistently the headphones perform after re-positioning them.
Good value: <0.5
Noticeable difference: 0.1
:
1.23 dB

Poor Consistency performance. The Bass Range of our Over-Ear and On-Ear headphones are measured on 5 different human subjects, 5 times each. In the graphs, each line represents an individual's average Bass response. The RS 165 shows about 18dB of variance at 20Hz, which is quite significant and noticeable. The inconsistent Bass performance of these headphones is the result of poor seal/fit, as well as different personal positioning preferences. The Treble Range shows better consistency with about 6dB of variance at 10KHz.

5.7 Soundstage
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What it is: Soundstage qualities are not inherent to the audio content, the headphones have to 'create' them rather than 'reproduce' them. They determine whether the sound is perceived to be coming from inside or in front of the head, how open and spacious the soundstage is, how much the headphones acoustically interact with the environment, and how strong the phantom center is.
When it matters: When an accurately produced, large and spacious soundstage, similar to that of a stereo loudspeaker setup is desired.
PRTF Error
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What it is: The average amount of deviation in Pinna-Related Transfer Function of the headphones, compared to that of a loudspeaker. Whether the soundstage is perceived to be unnatural, located inside or in front of the head, is dependent on this quality. The more the headphones activate the HRTF resonances of the ear (similar to what loudspeakers do), the more the soundstage will be pulled out from inside the listener's head. This quality affects both stereo and mono content.
When it matters: When a natural, in-the-front soundstage is desired, similar to that of a loudspeaker.
Good value: <5
Noticeable difference: 0.5
:
6.5 dB
Openness
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What it is: How open the headphones are, and how open and spacious they sound. This quality affects both stereo and mono content. This test differentiates between acoustically and electronically produced crosstalk and only takes the acoustically generated crosstalk into account. This value is the inverse of the Noise Isolation test score.
When it matters: When an open, wide and roomy sound is desired. A value of 10 indicates a fully open headphone, and a value of 0 indicates a fully closed headphone.
Good value: >7.5
Noticeable difference: 0.5
:
5.6
Acoustic Space Excitation
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What it is: How loud the headphones are, and how much they excite their environment acoustically. If the headphones are loud and open enough, the sound leaking from the headphones takes some of the characteristic of its environment (reflections/reverb) before reflecting back into the open headphones and to the listener's ears. This quality affects both stereo and mono content. This value is the inverse of the Leakage test score.
When it matters: When an open, wide and roomy sound is desired.
Good value: >7.5
Noticeable difference: 0.5
:
4.0
Correlated Crosstalk
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What it is: How strong and solid the phantom center is. This is mostly a stereo quality and its effects on mono content are minimal. This test is sensitive to the phase of the crosstalk and whether it is produced acoustically or electronically.
When it matters: When a true reproduction of the stereo image is desired. A value of 0 indicates no crosstalk, or that the existing crosstalk is not correlated enough to affect the phantom center. A negative score means the crosstalk is out of phase with the original signal, resulting in a slightly wider stereo image at the expense of creating a 'hole' at the center of the stereo field. A positive score means the crosstalk is in phase and positively affecting the phantom center.
Good value: >1dB
Noticeable difference: 0.3dB
:
0.5 dB

Poor Soundstage. Due to the closed-back design, these headphones sound a bit isolating and won't let the outside ambience be mixed with the music, like open headphones would. Also, due to their ear cup design, they don't interact with the pinna like loudspeakers do, which results in a Soundstage that is perceived mostly inside the listener's head as opposed to in front.

7.8 Imaging
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What it is: Imaging qualities are inherent to the audio content, the headphones have to 'reproduce' them rather than 'create' them. They determine how accurately the objects are positioned in the stereo image, and how transparent the imaging is.
When it matters: When accurate positioning of the objects in the stereo image, and clear and transparent imaging is desired.
Sennheiser RS 165 Phase Response
Phase Error
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What it is: The average amount of deviation in the phase, from the ideal flat response.
When it matters: When an accurate and transparent imaging is desired.
Good value: <60°
Noticeable difference: 10°
:
39.31 °
Driver Mismatch (Amplitude)
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What it is: The Left/Right balance of our test unit, that is, the amount of amplitude difference between the left and right drivers. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When a properly balanced stereo image and low manufacturing tolerance is desired. A poor score indicates a noticeable difference in level between the left and right drivers.
Good value: <0.3dB
Noticeable difference: 0.1dB
:
0.32 dB
Driver Mismatch (Frequency)
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What it is: The amount of difference (Std. Err.) between the frequency response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance, is desired. A poor score indicates there may be 'holes' in the stereo image at certain frequencies.
Good value: <2dB
Noticeable difference: 0.1dB
:
2.42 dB
Driver Mismatch (Phase)
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What it is: The amount of difference (Std. Err.) between the phase response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance, is desired. A poor score indicates there may be inaccuracies in the stereo image reproduction at certain frequencies.
Good value: <90°
Noticeable difference: 30°
:
32.49 °

Good Imaging performance. Phase shift is minimum, and their effects would be quite minimal on the performance of these headphones. Additionally, our test unit shows above average driver matching in amplitude, frequency and phase response.

7.2 Total Harmonic Distortion
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What it is: The subtle, unwanted frequencies (harmonics) produced alongside the intended frequencies.
When it matters: When clean and pure sound reproduction is desired, though its effect is not as noticable as frequency response.
Score components:
Sennheiser RS 165 Distortion
Weighted THD @ 90
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What it is: The overall amount of harmonic distortion measured at 90dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: <0.100
Noticeable difference: 0.1
:
1.041
Weighted THD @ 100
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What it is: The overall amount of harmonic distortion measured at 100dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at loud listening levels.
Good value: <0.300
Noticeable difference: 0.1
:
14.302

Decent Harmonic Distortion performance. The amount of harmonic distortion at 90dB is relatively low and above average. At 100dB SPL, there is a general rise in harmonic distortion in Bass and Mid Ranges, while remaining within good limits. In the Treble Range, there is little difference between the 90dB and 100dB passes, which is good.

5.7

Isolation

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Score components:

These headphones do not isolate well enough for loud environments. They only passively block noise and their design is not meant for outdoor use. They also leak a bit at higher volumes but if you use them primarily to watch movies then at least you won't be disturbing your neighbors even if your listening at extremely high volumes. Unfortunately, they will still be a bit distracting if you have a person right next to you and if you have a noisy home environment then you may not able to focus as well on the audio due to the poor isolation.

5.5 Noise Isolation
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What it is: How much outside noise is blocked out by putting the headphones on.
When it matters: If the headphones are going to be used in a noisy envinronment (airplane, subway, etc.)
Score components:
Sennheiser RS 165 Noise Isolation
Overall Attenuation
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What it is: The overall amount of environmental noise reduction in dB.
When it matters: In loud envinronments like planes, trains, offices, etc.
Good value: <-20dB
Noticeable difference: 1dB
:
-13.17 dB
Bass
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What it is: The overall amount of noise isolation in the bass range (20Hz-250Hz).
When it matters: When the outside noise is bass-heavy, like in airplanes.
Good value: <-15dB
Noticeable difference: 1dB
:
-2.07 dB
Mid
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What it is: The overall amount of noise isolation in the mid-range (250Hz-2.5KHz).
When it matters: When the environment's noise is mid-heavy, like in an office.
Good value: <-15dB
Noticeable difference: 1dB
:
-12.33 dB
Treble
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What it is: The overall amount of noise isolation in the treble range (2.5KHz-20KHz).
When it matters: When the environment's noise is treble-heavy. Although uncommon, areas with sharp sounds fall under this category.
Good value: <-30dB
Noticeable difference: 1dB
:
-26.08 dB
Self-Noise
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What it is: The amount of noise created by the active electronics of the headphones (if applicable), measured from 300Hz-20KHz. Applies mostly to wireless and noise-cancelling headphones.
When it matters: If too loud, it could become distracting when listening to quiet material like podcasts and audiobooks.
Good value: <16dB
Noticeable difference: 1dB
:
18.42 dB

Poor Isolation. The RS 165 don't have active noise cancelling, and their passive isolation doesn't isolate significantly in the Bass Range. In the Mid Range, they achieve about 12dB of reduction, and in the Treble Range they achieve about 27dB of reduction, both values being decent.

6.0 Leakage
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What it is: The amount of sound bleeding out of the headphones.
When it matters: When the listener doesn't want people around them (in office, recording studio, etc.) to hear what is being listened to.
Score components:
Sennheiser RS 165 Leakage
Overall Leakage @ 1ft
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What it is: The amount of sound leakage heard 1 foot away from the user, while the user is listening to a 100dB SPL signal.
When it matters: When you don't want people hear what you are listening to.
Good value: <35dB
Noticeable difference: 1dB
:
44.9 dB

Mediocre Leakage performance. The significant portion of leakage is spread between 300Hz and 3KHz which is a relatively broad range, but limited mostly to the Mid Range. However, the overall level of leakage is not too loud.

6.8

Active Features

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What it is: Headphones with active components that require a battery. This includes noise cancelling and wireless headphones that actively reduce noise or transmit audio via a wireless connection.
When it matters: How suitable the power and wireless specifications of an active headphone will be, depending on your listening habits. The range and/or discharge time of the active headphone you select will be important if you're often on the move or have long uninterrupted listening sessions.
Score components:

The Sennheiser RS 165 are RF headphones that have very low latency for watching movies and a 24-hour battery life. They also use rechargeable AAA batteries that can be charged directly with the stand but the charge time will vary depending on the capacity, age and wear of the batteries you use. Unfortunately, radio frequency headphones do not have the best range when obstructed so unless you're directly in front of your source you will experience some connection drops.

7.1 Wireless
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What it is: Headphones that offer a cable-free listening experience over a wireless network, typically via Bluetooth or radio frequency.
When it matters: If you don't want to be limited by the length of an audio cable. This means having the freedom to move around in your home or office with a much greater range than an audio cable could provide, especially, if the Bluetooth source is heavy or difficult to carry.
Type
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What it is: The type and version of the wireless network, the headphones use to connect to the audio source. This could either be Bluetooth or radio frequency.
When it matters: The Bluetooth version will determine how compatible the headphones are with your Bluetooth enabled devices. Typically, newer Bluetooth versions are backward compatible with older ones but may lack the additional features that more recent Bluetooth protocols provide.
:
Radio Frequency
SBC Latency
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What it is: The latency for the default sub-band coding of most Bluetooth headphones.
When it matters: When watching videos a high latency can cause sync issues between the images you see and the audio you hear.
Good value: 170ms or less
Noticeable difference: 15ms
:
46 ms
aptX Latency
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What it is: An audio coding algorithm (Codec) that improves bit rate efficiency. It reduces latency and improves sound quality over Bluetooth.
When it matters: For better sound quality if your often streaming music over Bluetooth. Also it slightly improves latency when watching videos with wireless headphones.
Good value: 130ms or less
Noticeable difference: 15ms
:
N/A
aptX(LL) Latency
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What it is: Low latency variation of aptX that significantly reduces sync issues between video and sound when using Bluetooth headphones.
When it matters: When watching videos or gaming latency is a lot more noticeable than just listening to music.
Good value: 50ms or less
Noticeable difference: 5ms
:
N/A
Obstructed Range
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What it is: The range that the wireless headphones can reach before dropping any audio when the Bluetooth source was placed in another room.
When it matters: If you can't or prefer not to carry your Bluetooth source on you, while listening to your audio in an indoor environment. Although, the obstructed wireless range will slightly depend on your home or office layout.
Good value: >35ft
Noticeable difference: 5ft
:
23 ft
Line of Sight Range
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What it is: The range that the wireless headphones can reach before dropping any audio when in direct line of sight of the Bluetooth device.
When it matters: If you can't or prefer not to carry your Bluetooth source on you, while listening to your audio in a large and open environment.
Good value: 170ft or more
Noticeable difference: 10ft
:
121 ft
NFC
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What it is: Near Field Communication technology that allows you to quickly, pair your headphones with your Bluetooth and NFC-enabled device.
When it matters: This makes pairing with an NFC-enabled device a lot easier than the typical and often tedious hold-to-pair procedure that most wireless headphones have.
:
N/A

The RS 165 are radio frequency headphones so they don't use Bluetooth to transmit data wirelessly. This has its advantages especially when it comes to latency as they will rarely have any sync issues when watching videos or gaming. They also connect immediately with the transmitter stand so there is no need for pairing. Unfortunately, they don't perform as well in terms of range. In direct line of sight, they do fairly well but once the stand is obstructed, the range is drastically reduced to less than 30ft. You won't be able to walk around your home with the headphones on and continue listening to your audio. However, if you're directly in front of your TV or a fixed source, then the range shouldn't be much of an issue.

7.2 Battery
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What it is: The power source of your headphones. All headphones with active features have a battery that will deplete over time.
When it matters: To continue using the active features of your headphones. Some models lose features or switch off completely when the battery is drained, which limits what you can do with them until the next charge.
Score components:
Battery Type
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What it is: The type of battery that the headphones use. Usually AAA or embedded, Li-ion rechargeable batteries.
When it matters: When your headphones run out of power. Rechargeable batteries usually charge via the headphones Micro-USB port whereas AAA batteries have to be replaced or charged with an external device.
:
AAA (X2)
Battery Life
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What it is: The amount of time it takes for a headphones' battery to be completely drained. Battery life will vary depending on the active features used and volume level.
When it matters: For active headphones that connect wirelessly, have noise cancellation or other audio-enhancing features, that cease to work once the battery is dead.
Good value: >10hrs
Noticeable difference: 0.5hrs
:
24 hrs
Charge Time
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What it is: The amount of time your active headphones have to be connected to a power source to charge from 0 to a 100%. However, charging time will vary depending on your power source.
When it matters: To be able to use the active features of your headphones. Especially, wireless ones that completely switch off and need to be recharged when the battery is dead.
Good value: 2h or less
Noticeable difference: 0.25h
:
N/A
Auto-off
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What it is: A feature that turns off the headphones, after a set time, when they're not in use.
When it matters: To prolong battery life when the headphones are not being used, or if you forget to manually turn off your headphones.
:
No
Audio while charging
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What it is: Some active headphones remain usable while charging. They continue to stream audio and do not disable other active features.
When it matters: This makes sure that your headphones's battery are not being drained when your relatively close to a power source. However, this means wireless headphones will need a wired connection to the power source during the charging process.
:
No
Passive Playback
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What it is: Active headphones that still work when all their active features are turned off or out of power.
When it matters: If you run out of power and do not have spare AA/AAA batteries or access to a power source to recharge your headphones.
:
No

The RS 165 have a good 24-hour battery life. They use rechargeable AAA batteries that can be charged directly with the stand but it takes more than 8 hours for a full charge which is very limiting. However, the charge time is very dependent on the capacity, age and wear of the rechargeable batteries you use. So your charge time will vary. Also, you can always just swap out the AAA with new non-rechargeable batteries which may be less cost effective but has 0 charge time.

0 App Support
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What it is: The additional app provided to enhance your listening experience. They typically deliver a set of practical features that give you more control over the sound, noise cancelling and effects that the headphones produce.
When it matters: An app with a lot of features allows you to customize your listening experience to suit your taste and preferences. For example, additions like an equalizer can give you more bass or treble and room effects can simulate a bigger Soundstage in closed back headphones.
Score components: Subjectively assigned
App Name : N/A
iOS : N/A
Android : N/A
Equalizer
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What it is: Parametric, graphic or preset sound profiles that slightly alter the frequency response.
When it matters: If you want to tailor, your listening experience. Depending on what you're listening to you may want more or less bass for some tracks or more mid-range for vocals-heavy audio.
:
N/A
ANC control
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What it is: Control over the Active noise canceling technology. This could be either a simple on/off button, and adjustable slider or even adaptive self-regulating noise cancellation.
When it matters: If you're in an environment where you need to monitor your surroundings or completely isolate yourself from ambient noise.
:
N/A
Room effects
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What it is: Room effects that enhance the audio quality to make it more immersive.
When it matters: If you want to further tweak your listening experience. Adding room effects, can simulate a more spacious Soundstage or deliver a surround sound-like feel.
:
N/A
Playback control
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What it is: An in-app player that gives you access to play/stop, track skipping or volume controls directly with the app.
When it matters: It's a shortcut that allows you to control your audio without leaving the application.
:
N/A

No compatible app

In the box

Sennheiser RS 165 In the box Picture

  • Sennheiser RS 165 Headphones
  • TR 165 transmitter
  • Audio cable
  • (EU) power adapter
  • (UK) power adapter
  • (AU) power adapter
  • (US) power adapter
  • 2 AAA NiMH rechargeable batteries
  • Manual

Conclusion
SEE PRICE
Amazon.com

6.5Mixed Usage
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What it is This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
The Sennheiser RS 165 are decent mixed usage headphones with an above average sound. They are best used for as critical listening or home theater headphones (coming soon) as they're not versatile enough for all environments and situations. That and the fact that they have a stand transmitter and no way to use the headphones wired means if you're not in direct line-of-sight or close to your source and the transmitter then the headphones are practically unsuable.
7.4Critical Listening
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What it is The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
Above-average for critical listening. They have a good audio reproduction with a good bass that can be amplified through their additional Bass button. The mid and treble range are also decently balanced that instruments and vocals are not drowned out by the regular bass response. Unfortunately, they don't have a spacious soundstage which won't be ideal for more critical listeners, and their bass performance varies a lot depending on your head shape and if you were glasses which makes them a bit inconsistent.
6.2Commute/Travel
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What it is How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
Score components:
Not suitable for commuting and traveling. Although they have a decent overall performance that would suggest they're OK for commuting, the fact that you must have the transmitter in range means they won't be the ideal headphones to use anywhere but at home or at the office in front of your Tv or PC.
5.4Sports/Fitness
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What it is How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
Score components:
Not intended for sports. They have a fixed transmitter, they're bulky and a bit unstable which is not ideal for running or working out.
6.9Office
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What it is How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
Score components:
Average for office use since you will most likely have a fixed source. They have a decent line-of-sight range, they're comfortable and easy-to-use. However, they're a bit leaky and they don't isolate enough for particularly noisy office environments.
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