In depth comparison and review of Sennheiser HD 250BT and EPOS I SENNHEISER ADAPT 135 USB II. Compare design, audio features, functions and other important specifications to easily choose the right headphones for you. Our goal is to help you uncover differences between the products and find the headphones that will best fit your needs.
| DESIGN AND DIMENSIONS | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Product Type | Headphones - Bluetooth - wireless | Headset - wired - USB, 3.5 mm jack | |
|---|---|---|---|
| Series | - | ADAPT 100 Series | |
| Weight | 125 g | 145.3 g | Sennheiser HD 250BT are lighter than Sennheiser HD 250BT headphones. |
| Colour | - | Black | |
| Earpad Material | - | Leatherette | |
| Recommended Use | Portable electronics | Portable electronics, computer |
| SOUND QUALITY | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | Closed | - | |
| Adjustable Headband | Yes | - | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 5.0 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Bluetooth Audio Codec | SBC, AAC, aptX, apt-X LL | - | |
| Noise Isolating | Yes | - | Sennheiser HD 250BT are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | EPOS Voice | |
| Frequency Response | 20 - 22000 Hz | 20 - 20000 Hz | Sennheiser HD 250BT offer a larger frequency range than EPOS I SENNHEISER ADAPT 135 USB II. |
| Total Harmonic Distortion (THD) | <0.3% | - | |
| Sensitivity | 110 dB | - | |
| Max Sound Pressure | - | 115 dB | |
| Diaphragm | 32 mm | - | |
| Magnet Material | - | Neodymium | |
| Features | Audio prompts | - | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Technology | Electret condenser | - | |
| Microphone Operation Mode | Omni-directional | Mono | |
| Noise Cancelling | - | Yes | EPOS I SENNHEISER ADAPT 135 USB II microphone can cancel out ambient noise. |
| Frequency Response | 100 - 10000 Hz | 100 - 8000 Hz | Sennheiser HD 250BT offer a larger microphone frequency range than EPOS I SENNHEISER ADAPT 135 USB II. |
| REMOTE CONTROL | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Controls | Volume, on/off, answer/end, hold, play/pause, next/previous track, reject call | Volume, answer/end |
|---|
| CABLE | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Cable Type | USB-C charge cable - detachable | Headset cable |
|---|
| FEATURES | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Features | - | EPOS ActiveGard |
|---|
| BATTERY AND CHARGING | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Battery Type | Headphone battery rechargeable | - | |
|---|---|---|---|
| Battery Capacity | 190 mAh | - | |
| Battery Life | 25 hour(s) | - | |
| Charging Time | 3 hour(s) | - |
| CONNECTIONS | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Connector Type | - | Headset (USB Type-A) Headset (mini-phone 3.5mm) |
|---|
| OTHERS | Sennheiser HD 250BT | EPOS I SENNHEISER ADAPT 135 USB II |
|---|
| Included Accessories | USB-C charging cable | - | |
|---|---|---|---|
| Compatibility | iPhone, Android phone | - | |
| Software Certification | - | Optimised for UC | |
| Compliant Standards | Bluetooth Class 1 | - | |
| Service & Support | - | Limited warranty - 2 years |
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