The Sennheiser HD1 In-Ear Wireless are average sounding around-the-neck headphones. They're lightweight, portable and relatively easy-to-use, but don't have the most durable build quality. They also do not block a lot of noise so they won't be ideal for noisy commutes, but since they barely leak, you can play you music at higher volumes and not be distracting to those around you.
The Sennheiser HD1 In-Ear have a simple wireless, around-the-neck design that keeps some of the aesthetic touches of the original Momentum In-ear headphones. The neckband is flexible and coated with a faux leather-like finish that makes the overall build quality feel a bit more premium. Unfortunately, the audio cables are relatively thin and not replaceable making the overall design a little less durable. On the upside, they're stable enough to take to the gym, they're easy-to-use, decently comfortable, and come with a sturdy good case to carry them in.
The Sennheiser HD1 Wireless In-Ear are decently stylish looking headphones. The flexible neckband is coated with a faux leather finish that blends well the typical red and black momentum aesthetic into an around-the-neck design. The earbuds and cables, on the other hand, are similar to the original momentum in-ear and do not feel as durable or as premium as the neckband which is slightly disappointing. Overall, they won't stand out for their design, especially if you put the neckband underneath your shirt, but the understated look will work for most.
The Sennheiser HD1 In-Ear are moderately comfortable headphones as long as you don't mind the around-the-neck design. They come with several tip sizes but no foam or special tips, which makes them pretty conventional in-ears. If you dislike the fit of in-ears then you will have some of the same issues with these headphones. But on the upside, the neckband is lightweight, flexible, and won't be too noticeable during long listening sessions.
The Sennheiser HD 1 In-Ear Wireless have an efficient button layout and control scheme. They provide call/music, track skipping, and volume controls and an additional button for power and Bluetooth pairing. The buttons deliver good tactile feedback, but their position on the left side of the neckband might take a bit of time to get used to.
The Sennheiser HD1 Wireless are moderately portable headphones. They're a lot larger than typical in-ears due to the neckband, but, they're not as cumbersome to carry around on your person as full sized headphones. They easily rest around the neck and can be tucked under your shirt or outfit.
The Sennheiser HD1 In-Ear with a sturdy, hard case that will protect the headphones from scratches, falls, and mild water damage. However, the case is fairly large which reduces the overall portability of the headphones when they're in their case, although they will easily fit into most bags.
The Sennheiser HD1 In-Ear are decently well-built headphones. The neckband especially is well made, flexible and won't easily break under physical stress. Unfortunately, the audio cables are a little thin and susceptible to wear and tear compared to the rest of the build. They could snap if they get repeatedly hooked on an item of clothing or by regular wear and tear. Also since the audio cables are not replaceable, this reduces the overall build quality.
The around-the-neck design of these headphones makes them considerably stable. They won't fall from your neck if during a run or jog but depending on how well the in-ear design fits your ears, the earbuds may get a little loose during more strenuous activities and exercise. Also, if the neckband is placed under your outfit, the audio cables can get hooked or tangled and pull the earbuds out of your ears.
The Sennheiser HD1 In-Ear Wireless is an average sounding pair of closed-back in-ear headphones. They have a deep and consistent bass, a good mid-range and good imaging. However, their bass sounds boomy and muddy, their mid-range is cluttered and recessed, and their treble lacks detail. Also, like most other in-ear headphones, they don't have an open and spacious soundstage.
Good bass range performance. LFE is at 10Hz which is excellent. Additionally, low-bass and mid-bass are pretty well-balanced. However, high-bass is overemphasized by more than 5dB, making the bass of the Sennheiser HD1 In-Ear boomy and muddy.
Good mid-range performance. The bump in low-mid is the continuation of the high-bass overmephasis, making the mid-range slightly muddy and cluttered. Mid-mid and high-mid are slightly under our target, pushing vocals/leads a bit to the back of the mix and giving more emphasis to the bass frequencies.
Mediocre treble range performance. Low-treble, which is responsible for detail and articulation lacks by about 5dB. The 12dB peak at 10KHz could make the S and T sounds sharp and piercing on overly bright tracks.
Very good consistency performance for the Sennheiser HD 1 In-Ear Wireless. If the user is able to achieve a proper fit and seal given the assortment of tips that come with the HD1, then they should be getting consistent performance out of the HD1 each time.
Very good harmonic distortion performance for the Sennheiser HD1 In-Ear. The overall amount of harmonic distortion in the bass range is very low, regardless of the level. The peaks at 1KHz and 6KHz however, could make the sound of those frequencies slightly harsh and brittle.
The Sennheiser HD1 Wireless do not isolate well enough for commuting and public transit. They barely leak even at very high volumes so you can mask some of the ambient noise in your environment by increasing your listening volume. Unfortunately, their relatively poor isolation will not be ideal for loud noisy environments unlike some of the other in-ear headphones. On the upside, if you can get a good fit with the few tips provided they should be able to block a bit more noise.
Excellent leakage performance. The leakage of the HD1 is centered around 2KHz, in a very narrow band. The level of the leakage is also very quiet which makes it barely audible.
Sub-par microphone performance for the Sennheiser HD1 Wireless In-Ear. Speech recorded with the microphone of the HD1 sounds thin and muffled, and because of the lack of clarity, may be slightly difficult to understand. Additionally, they are not able to separate speech from ambient noise very well and are not the best choice for moderately loud environments like a busy street.
Sub-par recording quality. LFE is at 479Hz and HFE at 2.5KHz. This results in a recorded speech that sounds thin and muffled. The area between LFE and HFE, however, is captured well.
Average noise handling performance. The microphone on the HD1 achieved a speech-to-noise ratio of 18dB, which is about average.
The Sennheiser HD1 In-Ear Wireless have a decent battery life, a good wireless range, and better latency performance than most Bluetooth headphones. Unfortunately, they still won't be ideal for watching movies and gaming, and may not last you a full day's use if you're a heavy user or forgot to charge them overnight. On the upside, they are pretty easy to pair and support NFC.
The Sennheiser HD1 In-Ear Wireless have a decently long battery life for an in-ear but will barely last you a full day if you're a heavy user. They also lack a few power saving features that would help them last longer, like an auto-off timer that you can set within the app, or the ability to play while charging, which is a little disappointing.
The Sennheiser Captune app offers a great parametric equalizer with presets for the Sennheiser HD1 In-Ear Wireless. However, the app feels a bit barebones in comparison to when its connected to the Sennheiser PXC 550 Wireless. It also lacks a good auto-off timer, room effects, and microphone options.
The Sennheiser HD1 In-Ear Wireless have a good wireless range. They stayed connected without any major audio drops up to 35ft when indoors and the signal was obstructed by walls. They also reached 120ft in direct-line-of-sight which is above-average for wireless in-ears. They should do well for most use cases especially if you keep your Bluetooth device on you but may not be ideal for very large offices. On the upside, they're easy to pair and support NFC.
The HD1 in-ear have relatively high latency for watching videos and gaming but perform better than most Bluetooth headphones. The audio will be slightly delayed but won't be as noticeable when aptX is enabled.
The Sony WI-1000X are better headphones than the Sennheiser HD1 In-Ear Wireless. They have better sound quality; their app offers more customization and they also have a better isolation performance. They also come with more tip options to find a better fit. However, the neckband of the Sennheiser HD1 feels more high-end, and they come with a hard case that protects the headphones better than the Sonys' pouch.