In depth comparison and review of Sennheiser HD 4.40 and Bowers & Wilkins PX. 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 | Bowers & Wilkins PX |
|---|
| Product Type | Headphones - Bluetooth - wireless - NFC | Headphones - Bluetooth - wireless - USB, 3.5 mm jack | |
|---|---|---|---|
| Weight | - | 335 g | |
| Colour | - | Space grey | Soft gold | |
| Earpad Material | - | Soft leather, memory foam | |
| Recommended Use | - | Portable electronics |
| SOUND QUALITY | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Ear Cups Type | Closed | - | |
| Adjustable Headband | - | Yes | |
| Foldable | - | Yes | Bowers & Wilkins PX can be folded. |
| Connectivity Technology | Wireless | Wireless | |
| Wireless Technology | Bluetooth | Bluetooth | |
| Bluetooth Version | Bluetooth 4.0 | Bluetooth 4.1 | Bowers & Wilkins PX have a more advanced version of Bluetooth than Sennheiser HD 4.40. |
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Headset Profile (HSP), Generic Access Profile (GAP), Service Discovery Application Profile (SDAP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Device ID Profile (DIP) | |
| Bluetooth Audio Codec | - | SBC, AAC, aptX HD | |
| Active Noise Cancelling | - | Yes | Bowers & Wilkins PX are equipped with active noice cancellation. |
| Active Noise Cancelling Technology | - | Adaptive Noise Cancelling | |
| Sound Output Mode | Stereo | Stereo | |
| Frequency Response | 18 - 22000 Hz | 10 - 20000 Hz | Sennheiser HD 4.40 offer a larger frequency range than Bowers & Wilkins PX. |
| Total Harmonic Distortion (THD) | 0.5% | <0.3% | Bowers & Wilkins PX have lower total harmonic distortion than Sennheiser HD 4.40. |
| Sensitivity | 113 dB | 111 dB | Sennheiser HD 4.40 have higher sensitivity than Bowers & Wilkins PX. |
| Impedance | 18 Ohm | 22 Ohm | |
| Diaphragm | - | 40 mm | |
| Features | - | Bluetooth aptX technology |
| MICROPHONE | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Form Factor | Built-in | Built-in | |
|---|---|---|---|
| Microphone Operation Mode | Omni-directional | - | |
| Frequency Response | 100 - 10000 Hz | - | |
| Microphones Included | 2 | 6 | Bowers & Wilkins PX have a built-in microphone. |
| REMOTE CONTROL | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Controls | - | Volume control, on/off, answer/end, play/pause, next/previous track |
|---|
| CABLE | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Cable Type | - | Headphones cable - detachable - 1.2 m | |
|---|---|---|---|
| Detachable Cable | - | Yes |
| BATTERY AND CHARGING | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Battery Type | Headphone battery lithium polymer | Headphone battery rechargeable - lithium polymer | |
|---|---|---|---|
| Battery Capacity | - | 850 mAh | |
| Battery Life | - | 50 hour(s) | |
| Battery Life Details | - | Continuous playback (noise cancelling OFF / cable connection): up to 50 hours Continuous playback (noise cancelling ON / cable connection): up to 33 hours Continuous playback (noise cancelling OFF): up to 29 hours Continuous playback (noise cancelling ON / Bluetooth): up to 22 hours |
| CONNECTIONS | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Connector Type | - | Headphones (mini-phone stereo 3.5 mm 4-pole) USB (USB Type-C) |
|---|
| OTHERS | Sennheiser HD 4.40 | Bowers & Wilkins PX |
|---|
| Included Accessories | - | Protective pouch, USB charging cable (120cm) |
|---|
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