In depth comparison and review of Sennheiser HD 4.40 and EPOS I SENNHEISER IMPACT SC 660 TC. 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 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headset - wired - Easy Disconnect | |
|---|---|---|---|
| Weight | - | 113 g | |
| Colour | - | Black with silver | |
| Earpad Material | - | Leatherette |
| SOUND QUALITY | Sennheiser HD 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Headphones Form Factor | Full size | On-ear | |
|---|---|---|---|
| Ear Cups Type | Closed | - | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.0 | - | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 18 - 22000 Hz | 50 - 18000 Hz | Sennheiser HD 4.40 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 4.40 have higher sensitivity than EPOS I SENNHEISER IMPACT SC 660 TC. |
| Impedance | 18 Ohm | 200 Ohm | |
| Magnet Material | - | Neodymium |
| MICROPHONE | Sennheiser HD 4.40 | 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 4.40 offer a larger microphone frequency range than EPOS I SENNHEISER IMPACT SC 660 TC. |
| Microphones Included | 2 | - |
| CABLE | Sennheiser HD 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Cable Type | - | Headset cable - 1 m |
|---|
| BATTERY AND CHARGING | Sennheiser HD 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Battery Type | Headphone battery lithium polymer | - |
|---|
| CONNECTIONS | Sennheiser HD 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Connector Type | - | Headset (EasyDisconnect) |
|---|
| OTHERS | Sennheiser HD 4.40 | EPOS I SENNHEISER IMPACT SC 660 TC |
|---|
| Included Accessories | - | Carrying pouch, leatherette ear pads, cable clip | |
|---|---|---|---|
| Service & Support | - | Limited warranty - 3 years |
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