In depth comparison and review of Sennheiser HD 4.40 and August EP650B. 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 | August EP650B |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headphones - Bluetooth - wireless - NFC - USB, 3.5 mm jack | |
|---|---|---|---|
| Height | - | 17.66 cm | |
| Width | - | 18.86 cm | |
| Depth | - | 7.1 cm | |
| Weight | - | 235 g | |
| Recommended Use | - | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | - | 10 m |
| SOUND QUALITY | Sennheiser HD 4.40 | August EP650B |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Ear Cups Type | Closed | - | |
| Foldable | - | Yes | August EP650B can be folded. |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.0 | Bluetooth 4.1 | August EP650B have a more advanced version of Bluetooth than Sennheiser HD 4.40. |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 18 - 22000 Hz | 60 - 20000 Hz | Sennheiser HD 4.40 offer a larger frequency range than August EP650B. |
| Total Harmonic Distortion (THD) | 0.5% | 1% | Sennheiser HD 4.40 have lower total harmonic distortion than Sennheiser HD 4.40. |
| Sensitivity | 113 dB | - | |
| Impedance | 18 Ohm | - | |
| Diaphragm | - | 50 mm | |
| Signal-To-Noise Ratio | - | 85 dB | |
| Features | - | Bluetooth aptX technology |
| MICROPHONE | Sennheiser HD 4.40 | August EP650B |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Microphone Operation Mode | Omni-directional | - | |
| Frequency Response | 100 - 10000 Hz | - | |
| Microphones Included | 2 | - |
| CABLE | Sennheiser HD 4.40 | August EP650B |
|---|
| Cable Type | - | Headphones cable - detachable |
|---|
| BATTERY AND CHARGING | Sennheiser HD 4.40 | August EP650B |
|---|
| Battery Type | Headphone battery lithium polymer | Headphone battery rechargeable - Lithium Ion | |
|---|---|---|---|
| Battery Capacity | - | 220 mAh | |
| Battery Life | - | 10 hour(s) | |
| Standby Time | - | 720 hours | |
| Charging Time | - | 2 hour(s) |
| CONNECTIONS | Sennheiser HD 4.40 | August EP650B |
|---|
| Connector Type | - | Headphones (mini-phone stereo 3.5 mm) USB |
|---|
| OTHERS | Sennheiser HD 4.40 | August EP650B |
|---|
| Compatibility | - | iPhone, iPad, iPod, Android phone |
|---|
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