In depth comparison and review of EPOS I SENNHEISER ADAPT 661 and EPOS ADAPT 660 AMC. 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 | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Product Type | Headset - Bluetooth - wireless, wired - 3.5 mm jack, USB-C | Headphones - Bluetooth - wireless, wired - NFC - 3.5 mm jack, 2.5 mm jack | |
|---|---|---|---|
| Weight | 227 g | 227 g | Both headphones are equally heavy. |
| Colour | Black | Black | |
| Recommended Use | Portable electronics, computer - voice, communication | Portable electronics, computer - voice, communication | |
| Bluetooth Range (Operating Distance) | 25 m | 25 m | The maximum operating distance of both headphones is the same. |
| SOUND QUALITY | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | Closed | Closed | |
| Foldable | Yes | Yes | Both headphones can be folded. |
| Connectivity Technology | Wireless, wired | Wireless, wired | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 5.0 | Bluetooth 5.0 | Both headphones have the same Bluetooth version. |
| Bluetooth Audio Codec | SBC, AAC, aptX, apt-X LL | SBC, AAC, aptX, apt-X LL | |
| Active Noise Cancelling | Yes | Yes | Both headphones are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | Hybrid ANC | Hybrid ANC | |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | EPOS AI, EPOS Voice | EPOS AI, EPOS Voice | |
| Frequency Response | 17 - 23000 Hz | 17 - 23000 Hz | Both headphones offer the same frequency response. |
| Total Harmonic Distortion (THD) | <0.5% | <0.5% | Both headphones have the same total harmonic distortion. |
| Impedance | 46 Ohm | 46 Ohm | |
| Max Sound Pressure | 118 dB | 118 dB | |
| Features | Audio prompts | Audio prompts |
| MICROPHONE | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Microphone Technology | - | Condenser | |
| Microphone Operation Mode | Beamforming | Beamforming | |
| Noise Cancelling | Yes | Yes | The microphones on both headphones can cancel out ambient noise. |
| Frequency Response | 150 - 6800 Hz | 150 - 6800 Hz | The frequency response of the microphones in both headphones is the same. |
| Microphones Included | 2 | 4 | EPOS ADAPT 660 AMC have a built-in microphone. |
| CABLE | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Cable Type | USB-C to micro-USB cable Audio cable |
Micro-USB cable - detachable Audio cable - detachable |
|
|---|---|---|---|
| Detachable Cable | Yes | Yes |
| FEATURES | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Features | Touch control, EPOS ActiveGard, Talk-Through | Touch control | |
|---|---|---|---|
| Internet of Things (IoT) Compatible | Yes | Yes | |
| Intelligent Assistant | Alexa | Alexa |
| BATTERY AND CHARGING | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | Headphone battery rechargeable | |
|---|---|---|---|
| Battery Capacity | 730 mAh | - | |
| Battery Life | 30 hour(s) | 30 hour(s) | Both headphones last the same amount of time on a single charge. |
| Standby Time | 15 days | 360 hours | Both headphones have the same lenght of standby time. |
| Charging Time | 3 hour(s) | 3 hour(s) | The charging of both headphones last the same time. |
| CONNECTIONS | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Connector Type | Audio line-in (mini-phone stereo 3.5 mm) USB (24 pin USB-C) |
- |
|---|
| OTHERS | EPOS I SENNHEISER ADAPT 661 | EPOS ADAPT 660 AMC |
|---|
| Included Accessories | Carrying case, BTD 800 USB-C dongle | - | |
|---|---|---|---|
| Software Certification | Certified for Microsoft Teams, Optimised for UC | - | |
| Compliant Standards | MFI | MFI | |
| Service & Support | Limited warranty - 2 years | Limited warranty - 2 years |
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