In depth comparison and review of ASTRO A40 TR and Sennheiser HMDC 27. 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 | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Product Type | Headset - wired - 3.5 mm jack | Headset - wired | |
|---|---|---|---|
| Height | 9.5 cm | - | |
| Width | 19.7 cm | - | |
| Depth | 20.32 cm | - | |
| Weight | 369 g | 240 g | Sennheiser HMDC 27 are lighter than ASTRO A40 TR headphones. |
| Colour | Black, blue | Black | Black, red | White | Black, olive | Navy, crimson | - | |
| Earpad Material | Synthetic leather | - | |
| Recommended Use | Game console, computer | Professional audio |
| SOUND QUALITY | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Headphones Form Factor | Full size | Full size | |
|---|---|---|---|
| Headphones Technology | Dynamic | Dynamic | |
| Ear Cups Type | Open | Closed | |
| Connectivity Technology | Wired | Wired | |
| Active Noise Cancelling | - | Yes | Sennheiser HMDC 27 are equipped with active noice cancellation. |
| Noise Isolating | Yes | - | ASTRO A40 TR are equipped with a noise isolating function. |
| Sound Output Mode | Stereo | Stereo | |
| Built-in Decoders | MixAmp Dolby Digital | - | |
| Sound Effects | 7.1 Channel Dolby Headphone Surround Sound | - | |
| Frequency Response | 20 - 24000 Hz | 8 - 18000 Hz | ASTRO A40 TR offer a larger frequency range than Sennheiser HMDC 27. |
| Total Harmonic Distortion (THD) | <0.1% | <0.1% | Both headphones have the same total harmonic distortion. |
| Impedance | 48 Ohm | - | |
| Max Sound Pressure | - | 128 dB | |
| Diaphragm | 40 mm | - | |
| In-Cord Volume Control | Yes | - |
| MICROPHONE | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Form Factor | Detachable headset microphone | - | |
|---|---|---|---|
| Type | Boom | Boom | |
| Microphone Technology | - | Dynamic | |
| Microphone Operation Mode | Uni-directional | Hypercardioid | |
| Frequency Response | - | 40 - 18000 Hz | |
| Audio Input Details | Uni-directional | - |
| REMOTE CONTROL | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Controls | Volume | - |
|---|
| CABLE | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Cable Type | Headset cable - detachable - 2 m Audio splitter - 1.5 m |
- | |
|---|---|---|---|
| Cable Length | 2 m | - | |
| Detachable Cable | Yes | - |
| FEATURES | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Features | - | EPOS ActiveGard |
|---|
| CONNECTIONS | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Connector Type | Headset (mini-phone stereo 3.5 mm 5-pole) | - |
|---|
| OTHERS | ASTRO A40 TR | Sennheiser HMDC 27 |
|---|
| Bundled with | Astro MixAmp Pro TR | - | |
|---|---|---|---|
| Included Accessories | Detachable microphone, 2 speaker tags | Wind screen, cable clip, headband padding | |
| Compatibility | Mac, Windows | - | |
| Service & Support | Limited warranty - 1 year | - |
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