Audio engineers and music producers looking for professional-grade studio reference monitoring headphones will be thrilled with the Sennheiser HD 400 PRO, a pair of open-back circumaural headphones designed for mixing and other pro audio applications. With a frequency response of 6 Hz to 38 kHz, these headphones provide clear reproduction of audio.

The dynamic drivers utilize a specialized polymer blend in its diaphragm as well as a high-powered magnet to drive the system. The damping system manages ventilation, which allows for deeper bass while mitigating the distortion that otherwise impacts clarity. The open earcups and angled transducers allow for a wide and transparent soundstage, recreating the optimal listening position found in high-end recording studios.

The lightweight HD 400 PRO sports velour earpads, which provide the ultimate comfort for long listening sessions. A single-ended, coiled cable with a 3.5mm plug provides you the freedom to operate. A straight cable and a 3.5mm to 1/4" adapter are also included.

Circumaural, Open-Back Design    Neutral Sound Reproduction    Padded Headset for Prolonged Listening    6 Hz to 38 kHz Frequency Response    Distortion-Free Sound Reproduction    SPL up to 110 dB    9.8' Coiled Cable with 3.5mm Plug    5.9' Straight Cable with 3.5mm Plug    Includes 3.5mm to 1/4" Adapter

• A professional's tool with neutral sound reproduction
• Lightweight design for all-day usage
• Single-sided, coiled cable allows the freedom to operate. For convenience, a straight cable is also included
• Angled transducers designed for low distortion at high SPLs provide a spacious and accurate soundstage

Related Questions and Answers

Q: 1. Can these ATH-R70x headphones be properly powered by an iphone or do they need to be connected to an amplifier?

A: You wouldn't need an external amplifier these headphones. You could get better performance out of them if you did however.

Q: 2. How long is the cord? no info here nor at A-T website on length.

A: The headphone cable included with the Audio-Technica ATH-R70x Pro Reference Headphones is 3 meters long.

Q: 3. Are they closed back?

A: Yes, they cover the ears entirely. The only downside in my opinion is that the bass isn't the best, but if you boost it on iTunes the product gets better.

Q: 4. Good day B&H. Can these headphones be used for HIFI music enjoyment listening like my HD650? Is the soundstage wider as well?

A: Yes, the Sennheiser HD 490 PRO Professional Reference Open-Back Studio Headphones can be used for music listening. "Soundstage" is not a technical or measurable concept. The HD 490 PRO have an open-backed design, similar to the HD 650, which provides a more natural listening experience than closed-back headphones, due to the lack of a proximity effect.

Q: 5. how well do these hold up to sweat from a boom operator on an outdoor set on a warm/hot day?

A: They are not sweat or weather resistant, but they are well made. Impossible to predict, but average sweat and humidity should not effect the performance or reliability very much.

Q: 6. Do I have to have an amp with this or can I plug this into my yamaha board and it will work right away without any issues?

A: You would require a headphone amplifier.

Q: 7. Will this work on the Sennheiser HD 280 Pro?

A: No. The Sennheiser Padding Set for HD 300 & HMD 300 Pro Headphones is not compatible for use on the Sennheiser HD 280 Pro Headphones.

Q: 8. Is it made in germany or irland?

A: Mine say MADE IN IRELAND above the inside of the earcups.

Q: 9. Does it have mic?

A: No

Q: 10. does this cable work with Sennheiser IE200 ?

A: The Sennheiser Black Cable for IE 400/500 is only compatible with the IE400 and IE500 models.