In depth comparison and review of Bang & Olufsen Beoplay H9i and EPOS I SENNHEISER ADAPT 135T USB-C 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 | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Product Type | Headphones - Bluetooth - wireless | Headset - wired - 3.5 mm jack, USB-C | |
|---|---|---|---|
| Series | - | ADAPT 100 Series | |
| Height | 20 cm | - | |
| Width | 19.5 cm | - | |
| Depth | 5.2 cm | - | |
| Weight | 285 g | 145.3 g | EPOS I SENNHEISER ADAPT 135T USB-C II are lighter than Bang & Olufsen Beoplay H9i headphones. |
| Colour | Natural | Black | Pine | Black | |
| Body Material | Fabric, rubber, anodised aluminium, polymer | - | |
| Earpad Material | Leather, memory foam | Leatherette | |
| Headband Material | Leather | - | |
| Recommended Use | Portable electronics | Portable electronics, computer |
| SOUND QUALITY | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.2 | - | |
| Bluetooth Audio Codec | AAC | - | |
| Active Noise Cancelling | Yes | - | Bang & Olufsen Beoplay H9i are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | Hybrid ANC | - | |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | EPOS Voice | |
| Frequency Response | 20 - 22000 Hz | 20 - 20000 Hz | Bang & Olufsen Beoplay H9i offer a larger frequency range than EPOS I SENNHEISER ADAPT 135T USB-C II. |
| Sensitivity | 95 dB/mW | - | |
| Impedance | 24 Ohm | - | |
| Max Sound Pressure | - | 115 dB | |
| Diaphragm | 40 mm | - | |
| Magnet Material | - | Neodymium | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Form Factor | Built-in | - | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | - | Mono | |
| Noise Cancelling | - | Yes | EPOS I SENNHEISER ADAPT 135T USB-C II microphone can cancel out ambient noise. |
| Frequency Response | - | 100 - 8000 Hz | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Controls | Volume, power on/off, answer/end, play/pause, next/previous track, pair mode, noise-cancellation suspend button, audio transparency | Volume, answer/end |
|---|
| CABLE | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Cable Type | Headphones cable - detachable - 1.2 m USB to USB-C cable - 1.25 m |
Headset cable | |
|---|---|---|---|
| Cable Length | 1.2 m | - |
| FEATURES | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Features | - | EPOS ActiveGard | |
|---|---|---|---|
| Sensors | Proximity sensor | - |
| BATTERY AND CHARGING | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Battery Type | Headphone battery rechargeable - Lithium Ion | - | |
|---|---|---|---|
| Battery Capacity | 770 mAh | - | |
| Battery Life | 24 hour(s) | - | |
| Battery Life Details | Continuous playback (noise cancelling ON / Bluetooth): up to 18 hours Continuous playback (noise cancelling OFF): up to 23 hours Continuous playback (noise cancelling ON / cable connection): up to 24 hours |
- | |
| Charging Time | 2.5 hour(s) | - |
| CONNECTIONS | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm 4-pole) | Headset (USB Type-C) Headset (mini-phone 3.5mm) |
|---|
| OTHERS | Bang & Olufsen Beoplay H9i | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Included Accessories | Carrying pouch, airplane adapter | - | |
|---|---|---|---|
| Software Certification | - | Certified for Microsoft Teams, Optimised for UC | |
| Service & Support | Limited warranty - parts and labour - 2 years | Limited warranty - 2 years |
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