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FIIL T1X True Wireless Headphones Review

Tested using Methodology v1.4
Reviewed Sep 02, 2020 at 07:54 am
FIIL T1X True Wireless Picture
7.2
Mixed Usage
7.1
Neutral Sound
7.7
Commute/Travel
8.2
Sports/Fitness
6.9
Office
5.6
Wireless Gaming
5.5
Wired Gaming
6.2
Phone Calls
Type In-ear
Enclosure Closed-Back
Wireless Truly Wireless
Noise Cancelling No
Mic Yes
Transducer Dynamic

The FIIL T1X are budget-level truly wireless headphones. These slim and sleek in-ears have a slightly bass-heavy sound profile that delivers a satisfying thump and punch. They're still neutral and balanced enough for most audio content, so you can enjoy your favorite tunes with little problem. However, they struggle to block out bass-range noise like bus engines. Their integrated boom microphone also makes voices sound distorted and unnatural, which isn't great if you make a lot of calls. On the upside, while other headphones at this price point tend to have limited features, these headphones also come with a companion app that offers 15 EQ presets. When you're on-the-go, their 6.8-hour battery can quickly charge up in just over half an hour, and their case has three additional charges to keep you going.

Our Verdict

7.2 Mixed Usage

The FIIL T1X are decent for mixed use. These small and portable in-ears are easy to take with you on-the-go. Although they struggle to cut down bass-level noise like bus and train engines, they do a better job of reducing mid-range sounds like office chatter. They're stable and comfortable to wear, so you can take them with you on a run or wear them for long music-listening sessions. They also have a slightly bass-heavy sound profile that fans of EDM and hip-hop may enjoy and their companion app offers 15 EQ presets to further customize their sound.

Pros
  • Comfortable, stable fit.
  • Decent battery performance.
  • 15 EQ presets available via the companion app.
Cons
  • Disappointing mic recording quality.
  • Control scheme isn't the most intuitive.
  • No multi-device pairing.
7.1 Neutral Sound

The FIIL T1X are satisfactory for neutral sound. They have a slightly bass-heavy sound profile with a slightly underemphasized treble. While they're still somewhat neutral overall, they can be further tweaked using their companion app. The FIIL+ app offers 15 EQ presets, so you can achieve a better sound to suit your needs. As they're also in-ear headphones, they have an outstandingly consistent sound delivery.

Pros
  • Comfortable, stable fit.
  • 15 EQ presets available via the companion app.
Cons
  • Slightly bass-heavy sound profile.
  • Bad passive soundstage.
7.7 Commute/Travel

The FIIL T1X are good for commuting and travel. While they struggle to cut down low-bass sounds like bus or plane engines, these small headphones are comfortable enough to wear for long commutes. They come with a couple of ear tips and stability fins to help you find a better fit. They also have 6.8-hour of battery life, and their charging case holds three additional charges if you need even more battery.

Pros
  • Comfortable, stable fit.
  • Decent battery performance.
  • Satisfactory noise isolation.
Cons
  • Control scheme isn't the most intuitive.
8.2 Sports/Fitness

The FIIL T1X are great for sports and fitness. You can easily take these small and lightweight in-ears with you on-the-go. They have a very stable fit, and thanks to their included ear tips and stability fins, you can find the best fit for you. They're also quite comfortable and since they don't have cables, you don't have to worry about something snagging on them and pulling them out of your ears. They're also rated IP65 for dust and water resistance, although we don't currently test for this.

Pros
  • Comfortable, stable fit.
  • Decent battery performance.
  • IP65 rating.
Cons
  • Control scheme isn't the most intuitive.
6.9 Office

The FIIL T1X are alright for office use. These comfortable in-ears come with a couple of different ear tips and stability fins to give you a better fit. While they struggle a bit to reduce low-bass sounds, they do a better job of blocking ambient speech. They also don't leak much sound, so you can enjoy your music at a high volume without bothering your coworkers. While their 6.8-hour battery life may not last you through an entire day of work, the case carries three additional charges and it can replenish your battery quickly.

Pros
  • Comfortable, stable fit.
  • Decent battery performance.
Cons
  • Control scheme isn't the most intuitive.
  • No multi-device pairing.
5.6 Wireless Gaming

The FIIL T1X are Bluetooth-only headphones and their latency is too high to be recommended for gaming.

5.5 Wired Gaming

The FIIL T1X are Bluetooth-only headphones and can't be used wired.

6.2 Phone Calls

The FIIL T1X are mediocre for phone calls. Unfortunately, their integrated microphone makes voices sound distorted and unnatural. It also struggles to separate voices from ambient noise in loud environments. On the upside, these headphones can isolate a decent amount of noise so you can focus on your call.

Pros
  • Satisfactory noise isolation.
Cons
  • Disappointing mic recording quality.
  • 7.2 Mixed Usage
  • 7.1 Neutral Sound
  • 7.7 Commute/Travel
  • 8.2 Sports/Fitness
  • 6.9 Office
  • 5.6 Wireless Gaming
  • 5.5 Wired Gaming
  • 6.2 Phone Calls

Test Results

perceptual testing image
Design
Design
Style

The FIIL T1X are black oval-shaped in-ears that otherwise look very similar to other truly wireless headphones. On the outside, they have a shiny plastic look with their brand name on it. However, the inner parts have a matte finish.

7.5
Design
Comfort
Weight 0.02 lbs
Clamping Force
0.0 lbs

The FIIL T1X are comfortable headphones. They don't go too deep into your ear canal and they don't put too much pressure on the ears. They also come with a few ear tips and stability fins to help you get the best fit possible. As they have touch-sensitive controls, you also don't have to apply too much pressure to register a command.

6.5
Design
Controls
OS Compatibility
Not OS specific
Ease Of Use Okay
Feedback Good
Call/Music Control Yes
Volume Control Yes
Microphone Control No
Channel Mixing
No
Noise Cancelling Control No
Talk-Through
No
Additional Controls Voice Assistant

These in-ears have adequate controls, but they're not the most intuitive to use right off-the-bat. For example, raising the volume requires one tap on the left earbud while lowering the volume requires three taps on the same earbud. That being said there's some audio prompts to let you know when you're pairing or turning on/off the headphones. They also beep when you reach min or max volume.

9.4
Design
Portability
L 1.4 "
W 1.1 "
H 1.0 "
Volume 1.5 Cu. Inches
Transmitter Required No

Like most truly wireless headphones, the FIIL T1X are outstandingly portable headphones. You can easily put them into most pockets or throw them into a bag. Their carrying case isn't too big, either.

7.5
Design
Case
Type Hard case
L 3.0 "
W 1.4 "
H 1.2 "
Volume 5.0 Cu. Inches

The FIIL T1X have a good carrying case that feels solid and sturdy. Inside the case, some icons let you know the control scheme of the headphones. However, it doesn't tell you how many taps or holds you need to register that command.

7.5
Design
Build Quality

The FIIL T1X have a good build quality. The earbuds are made from good quality plastic and have an IP65 rating for dust and water resistance, though this isn't something we currently test for. The carrying case also feels very sturdy.

8.0
Design
Stability

These headphones are very stable and are well-suited for sports. They come with multiple ear tips and stability fin sizes, so you can find the right fit for your ears.

Design
Headshots 1
Design
Headshots 2
Design
Top
Design
In The Box

  • FIIL T1X headphones
  • 4x ear tips
  • 3x stability fins
  • Charging case
  • USB-C charging cable
  • Manuals

Sound
Sound
Sound Profile
Bass Amount
2.76 db
Treble Amount
-0.52 db

These headphones have a slightly bass-heavy sound and can deliver a thumpy, punchy sound that fans of EDM and hip-hop can enjoy. However, if you prefer a different sound, their companion app offers 15 EQ presets.

9.8
Sound
Frequency Response Consistency
Avg. Std. Deviation
0.04 dB

These headphones have excellent frequency response consistency. If you can achieve a proper fit and an air-tight seal using the assortment of tips that come with the headphones, then you should be able to get a consistent bass and treble delivery every time you use the headphones.

Sound
Raw Frequency Response
8.0
Sound
Bass Accuracy
Std. Err.
2.76 dB
Low-Frequency Extension
10 Hz
Low-Bass
3.34 dB
Mid-Bass
2.79 dB
High-Bass
3.2 dB

These headphones have great bass accuracy. Although it's a little overemphasized across the entire range, fans of EDM and bass may prefer this thumpy, punchy sound. It shouldn't be too overwhelming for most other audio genres, though, as it's still well-balanced and flat.

8.6
Sound
Mid Accuracy
Std. Err.
1.83 dB
Low-Mid
1.03 dB
Mid-Mid
-2.52 dB
High-Mid
0.01 dB

The FIIL T1X have excellent mid accuracy. Although there's a small dip in the mid-mids which nudges instruments to the back of the mix, the rest of the range is fairly flat. This results in clear vocals and lead instruments.

7.1
Sound
Treble Accuracy
Std. Err.
3.93 dB
Low-Treble
-0.19 dB
Mid-Treble
0.14 dB
High-Treble
-1.59 dB

The FIIL T1X earbuds have satisfactory treble accuracy. Its low-treble is uneven but slightly underemphasized, which can slightly veil vocals and lead instruments. The mid-treble is also uneven, resulting in both dull as well as bright sibilants like S and T sounds.

7.3
Sound
Peaks/Dips
Peaks
1.57 db
Dips
1.71 db

The peaks and dips performance of the FIIL T1X is decent. The peak in the high-bass adds a small bit of muddiness while the dip in the mid-mids nudges vocals and lead instruments to the back of the mix. There's also a dip between the low to mid-treble, which further veils and darkens lead instruments. It's followed by a peak in the mid-treble that sharpens sibilants.

9.3
Sound
Imaging
Weighted Group Delay
0.1
Weighted Amplitude Mismatch
0.7
Weighted Frequency Mismatch
0.7
Weighted Phase Mismatch
0.82

The stereo imaging of the FIIL T1X is amazing. The group delay is under the audibility threshold, resulting in a tight bass and transparent treble reproduction. Both L/R drivers are also well-balanced, which is important for the accurate placement and localization of objects and instruments in the stereo image. However, these results are only valid for our unit and yours may perform differently.

1.1
Sound
Passive Soundstage
PRTF Accuracy (Std. Dev.)
N/A
PRTF Size (Avg.)
N/A
PRTF Distance
N/A
Openness
2.8
Acoustic Space Excitation
1.7

Like most in-ears, these headphones have a very bad soundstage. Pinna or outer-ear interaction is one of the main factors in producing a large and out-of-head soundstage. However, due to their in-ear fit, the soundstage of these headphones is perceived as small and located inside your head as opposed to in front.

0
Sound
Virtual Soundstage
Head Modeling
No
Speaker Modeling
No
Room Ambience
No
Head Tracking
No
Virtual Surround
No

These headphones don't have any virtual soundstage features.

7.3
Sound
Weighted Harmonic Distortion
WHD @ 90
0.295
WHD @ 100
0.270

The FIIL T1X's weighted harmonic distortion is decent. There's a couple of small peaks, one in the high-mid and the other in the mid-treble, but they shouldn't be noticeable to most listeners.

Sound
Test Settings
Firmware
Unknown
Power
On
Connection
Bluetooth 5.0
Codec
SBC, 16-bit, 48kHz
EQ
Default
ANC
No ANC
Tip/Pad
Silicone (small)
Microphone
Integrated

These are the settings we used to these headphones. The test results are only valid for these settings.

Isolation
7.2
Isolation
Noise Isolation
Isolation Audio
Overall Attenuation
-20.07 dB
Bass
-7.21 dB
Mid
-17.85 dB
Treble
-36.07 dB

These headphones have decent noise isolation. While they struggle to cut down bass-range noise like the rumble of bus or plane engines, they do a better job of reducing ambient chatter. They're also able to block out a significant amount of treble-range noise like the hum of an A/C fan.

8.5
Isolation
Leakage
Leakage Audio
Overall Leakage @ 1ft
30.1 dB

The leakage performance of the FIIL T1X is excellent. If you're at the office and listening to your headphones at a high volume, you shouldn't disturb the people around you too much.

Microphone
Microphone
Microphone Style
Integrated
Yes
In-Line
No
Boom
No
Detachable Boom
No

These headphones have an integrated microphone.

5.1
Microphone
Recording Quality
Recorded Speech
LFE
250.34 Hz
FR Std. Dev.
8.83 dB
HFE
22988.02 Hz
Weighted THD
2194.022
Gain
-19.83 dB

The FIIL T1X's integrated mic has a disappointing recording quality. Your voice sounds unnatural and distorted. People on the other end of the line may have some difficulty understanding you.

6.8
Microphone
Noise Handling
Speech + Pink Noise
Speech + Subway Noise
SpNR
19.25 dB

The noise handling performance of the FIIL T1X is alright. While its performance is better than the truly wireless ENACFIRE E60, it still struggles to separate speech from ambient background noise, even in moderately noisy environments.

Active Features
7.1
Active Features
Battery
Battery Type
Rechargable
Continuous Battery Life
6.8 hrs
Additional Charges
3.0
Total Battery Life
27.2 hrs
Charge Time
0.7 hrs
Power-Saving Feature
Standby mode
Audio While Charging
Yes
Passive Playback
No
Charging Port USB-C

The FIIL T1X's battery performance is decent. They get just a bit over their advertised six hours of continuous battery life and their charging case comes with three additional charges. They charge pretty quickly, too, and you can even charge one earbud and use the other at the same time. If you're looking for truly wireless headphones with a longer continuous battery life, check out the Tranya T10 Truly Wireless.

7.0
Active Features
App Support
App Name FIIL +
iOS Yes
Android Yes
macOS No
Windows No
Equalizer
Presets
ANC Control
No
Mic Control No
Room Effects
No
Playback Control
Yes
Button Mapping No
Surround Support
No

The FIIL T1X have a decent companion app called FIIL+. It gives you access to 15 EQ presets and you can adjust their bass or treble to create a new EQ preset. It can also show you your battery level as well as turn low-latency mode on/off. While you can't remap their buttons, you can put these headphones into 'Easy Mode' which turns off volume and track skipping controls.

Connectivity
6.9
Connectivity
Bluetooth
Bluetooth Version
5.0
Multi-Device Pairing
No
NFC Pairing
No
Line Of Sight Range
263 ft
PC Latency (SBC)
241 ms
PC Latency (aptX)
N/A
PC Latency (aptX HD)
N/A
PC Latency (aptX-LL)
N/A
iOS Latency
177 ms
Android Latency
232 ms

The FIIL T1X have alright Bluetooth connectivity. While they support Bluetooth 5.0, they can't be paired with multiple devices and they're not NFC-compatible. They also have high latency on PC, iOS, and Android when streaming video. While some apps and devices seem to compensate for this differently, there's also a setting in the app called 'Low-Latency Mode' which helps to reduce lag and we measured 120ms of delay in this mode. However, it still uses the default SBC codec and not the aptX-LL codec. That said, your real-world experience may vary.

0
Connectivity
Non-Bluetooth Wireless
Non-BT Line Of Sight Range
N/A
Non-BT Latency
N/A

These in-ears are Bluetooth-only.

0
Connectivity
Wired
Analog Audio
No
USB Audio
No
Detachable No
Length N/A
Connection No Wired Option
Analog/USB Audio Latency
N/A

The FIIL T1X TWS True Wireless Earbuds can't be used with a wired connection. They come with a USB-C cable to recharge their case.

Connectivity
PC / PS4 Compatibility
PC/PS4 Analog
No
PC/PS4 Wired USB
No
PC/PS4 Non-BT Wireless
No

These headphones are only compatible with Bluetooth-enabled PCs and can't be used on a PS4 at all. As they have high latency, they aren't recommended for gaming.

Connectivity
Xbox One Compatibility
Xbox One Analog
No
Xbox One Wired USB
No
Xbox One Non-BT Wireless
No

These headphones are Bluetooth-only and aren't compatible with the Xbox One.

2.2
Connectivity
Base/Dock
Type
Charging Case
USB Input
No
Line In
No
Line Out
No
Optical Input
No
RCA Input
No
Dock Charging
Yes
Power Supply
USB-C

The FIIL T1X come with a charging case that holds three additional charges. It charges via USB-C.

Compared To Other Headphones

The FIIL T1X are budget-level truly wireless in-ears. These comfortable and stable headphones have a 6.8-hour battery life that charges pretty quickly. They also have a companion app that offers 15 EQ presets, which is a pretty nice addition at their price point. However, just like most in-ears, they have a disappointing integrated mic that struggles to capture clear voices. If you're looking for more headphones, check out our recommendations for the best cheap earphones, the best wireless Bluetooth earbuds, and the best wireless earbuds for iPhone.

Mpow M30 Truly Wireless

The FIIL T1X True Wireless are slightly better in-ears than the Mpow M30 Truly Wireless. The FIIL have a more neutral sound profile, their continuous battery life is longer, and they charge in less time. They also have an app that gives you access to 15 EQ presets. However, the Mpow have a better-performing integrated mic, they can isolate slightly more noise, and they leak less sound.

ENACFIRE E60 Truly Wireless

The ENACFIRE E60 Truly Wireless and the FIIL T1X True Wireless are two very similarly performing in-ear headphones. They're both comfortable and well-built headphones. That said, the FIIL have a more neutral sound profile that delivers a bit more bass and treble as well as a companion app that offers 15 EQ presets. They also have a more stable in-ear fit as they come with stability fins. On the other hand, the ENACFIRE's charging case also holds more additional charges. However, it doesn't go into standby mode when not in use like the FIIL.

EarFun Free Truly Wireless

The FIIL T1X True Wireless are better for commuting and traveling than the EarFun Free Truly Wireless. The FIIL are more comfortable, have better touch-sensitive controls, and have a more neutral sound profile. They also feel better built, they're able to isolate more noise, and their continuous battery life lasts longer too. They even have an app that offers 15 different EQ presets. However, the EarFun's integrated mic captures voices better and they leak less sound.

TaoTronics SoundLiberty 79 Truly Wireless

The FIIL T1X True Wireless are better truly wireless in-ears for commuting and traveling than the TaoTronics SoundLiberty 79 Truly Wireless. The FIIL are more comfortable, they're able to isolate noise better, and their continuous battery life is longer. Their battery also charges quicker, their integrated mic is better at noise handling, and their companion app offers 15 different EQ presets. However, the TaoTronics have a more neutral sound profile and their integrated mic has a better recording quality.

TOZO T6 Truly Wireless

The FIIL T1X True Wireless are better truly wireless headphones for sports and fitness than the TOZO T6 Truly Wireless. The FIIL are more comfortable and stable, and their sound profile is better-balanced and more neutral. They also have longer continuous battery life and they charge in less time too. They even come with a companion app that has 15 EQ presets. However, the TOZO isolate more noise, they leak less sound, and their integrated mic has a better recording quality.

Tranya T10 Truly Wireless

The FIIL T1X True Wireless are better headphones than the Tranya T10 Truly Wireless. The FIIL are more comfortable, more stable, and they isolate more background noise. Their default sound profile is much more neutral and balanced than the Tranya's excited sound, and they have a companion app with presets to help you customize the sound. That said, the Tranya have longer continuous battery life.

Skullcandy Jib True Wireless

The FIIL T1X True Wireless are better overall truly wireless in-ears than the Skullcandy Jib True Wireless. The FIIL have a comfier, more stable fit, a slightly better-balanced sound profile, a microphone with superior noise handling capability, and a longer battery life. They also have more features, like a companion app that grants you access to 15 different EQ presets. The Skullcandy block out more ambient noise, leak less audio, and have a microphone with better recording quality.

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