Side by side comparison and review of Sennheiser HD 4.50 BTNC Wireless and EPOS I SENNHEISER IMPACT SC 660 TC. Compare design, sound quality and other key specifications and features to simplify the choice of your perfect headphones. Our goal is to make it easier for you to decide on the headphones that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headset - wired - Easy Disconnect | |
|---|---|---|---|
| Weight | 238 g | 113 g | EPOS I SENNHEISER IMPACT SC 660 TC are lighter than Sennheiser HD 4.50 BTNC Wireless headphones. |
| Colour | - | Black with silver | |
| Earpad Material | - | Leatherette | |
| Recommended Use | Portable electronics | - |
| SOUND QUALITY | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Headphones Technology | Dynamic | - | |
| Ear Cups Type | Closed | - | |
| Foldable | Yes | - | Sennheiser HD 4.50 BTNC Wireless can be folded. |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.0 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Active Noise Cancelling | Yes | - | Sennheiser HD 4.50 BTNC Wireless are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | NoiseGard active noise compensation | - | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 18 - 22000 Hz | 50 - 18000 Hz | Sennheiser HD 4.50 BTNC Wireless offer a larger frequency range than EPOS I SENNHEISER IMPACT SC 660 TC. |
| Total Harmonic Distortion (THD) | <0.5% | - | |
| Sensitivity | 113 dB | 103 dB | Sennheiser HD 4.50 BTNC Wireless have higher sensitivity than EPOS I SENNHEISER IMPACT SC 660 TC. |
| Impedance | 18 Ohm | 200 Ohm | |
| Magnet Material | Neodymium | Neodymium | |
| Features | Bluetooth aptX technology | - |
| MICROPHONE | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Form Factor | Built-in | Headset microphone | |
|---|---|---|---|
| Type | - | Boom | |
| Microphone Operation Mode | Omni-directional | - | |
| Frequency Response | 100 - 10000 Hz | 150 - 6800 Hz | Sennheiser HD 4.50 BTNC Wireless offer a larger microphone frequency range than EPOS I SENNHEISER IMPACT SC 660 TC. |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Controls | Power on/off, volume control, answer/end, hold, play/pause, next/previous track, reject call, redial | - |
|---|
| CABLE | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Cable Type | Headphones cable - detachable - L shaped - 1.4 m Micro-USB charge cable - detachable |
Headset cable - 1 m | |
|---|---|---|---|
| Cable Length | 1.4 m | - | |
| Detachable Cable | Yes | - | |
| Plated Connector | Gold | - |
| BATTERY AND CHARGING | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Battery Type | Headphone battery rechargeable - lithium polymer | - | |
|---|---|---|---|
| Battery Capacity | 600 mAh | - | |
| Battery Life | 25 hour(s) | - | |
| Charging Time | 2 hour(s) | - |
| CONNECTIONS | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Connector Type | Headphones (mini-phone stereo 3.5 mm) | Headset (EasyDisconnect) |
|---|
| OTHERS | Sennheiser HD 4.50 BTNC Wireless | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Included Accessories | Carrying case, micro-USB charging cable | Carrying pouch, leatherette ear pads, cable clip | |
|---|---|---|---|
| Service & Support | - | Limited warranty - 3 years |
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