Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Amplified Drivers: The AH-D400 Urban Raver over-ear headphones feature 50mm drivers powered by a built-in amplifier. This combination gives you explosive bass response and enhanced treble. The headphone amplifier runs on a 3.7 volt Lithium-polymer rechargeable battery, which provides up to 12 hours of use on a full charge. The amplifier can be switched on or off via a 2-way switch, while a red LED on the left earcup indicates the level of battery charge. You can turn on or off the blue LEDs on both earcups as you listen, if desired. The headphones can still be used in the passive mode after the battery power runs out. The battery charges via the supplied USB cable.

Compatibility: The headphones feature integrated Apple-compatible controls and microphone on the right earpiece. These can control music operation on compatible Apple devices and conduct phone calls or perform voice recognition activities. The AH-D400s are compatible with iPod nano (4th gen or later), iPod classic (120GB/160GB), iPod touch (2nd gen or later), iPod shuffle (3rd gen and later), iPhone (3GS, 4, and 4S), and iPad. Audio is supported by all iPod models, as well as virtually any device with a 3.5mm minijack output.

On-ear Remote/Microphone: Denon's patent-pending Control Wheel, located on the right ear piece, gives you control of your iPod, iPhone, and iPad. The volume can be raised or lowered incrementally with a twist of the wheel. While listening to music, you can control playback by pressing the center of the wheel for play/pause, next track, previous track, fast forward, and fast reverse. Phone controls include answer/end a call, switch to an incoming or on-hold call, put a call on hold, or decline a call.

Headphone Cable: The headphones have a 55" Teflon-coated OFC cable with a 3.5mm miniplug terminal. The clear, low-friction outer coating helps keep the cable from getting tangled and reduces the chance you'll get contact noise as you move. A 3.5mm-to-1/4" adapter is included for listening to home components with a full-sized headphone output.

Comfortable Fit: The AH-D400 Music Maniac headphones are designed for comfort and fit. Denon's patent-pending Pentagonally-shaped Memory Foam Ear Pads provide superior comfort. The ear cups feature two-axis articulation and an adjustable padded headband to give you a perfect, custom fit.

Carrying Case: The headphones come with a carrying case with a carabiner which allows you to clip the headphones to a backpack or purse strap.

Denon Club App: The Denon Club Smartphone Application for iPhone, iPad, or Android is designed to enhance your listening experience. It includes a real-time spectrum analyzer, and allows you to use any of 10 EQ presets, or create, store, and share your own custom EQ curves. The app gives you access to song lyrics, and create and store custom playlists. With the TuneIn Internet Radio service, you can listen to any of over 50,000 internet radio stations.