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Denon AH-C400 Music Maniac

In-ear headphones

1 Review

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Item # 033AHC400

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Our take on the Denon AH-C400 Music Maniac™

Not convinced that in-ear headphones can deliver audiophile-grade, full-range sound? Let Denon's AH-C400 make a believer out of you. Small yet robust, these in-ears will blow away expectations for listeners used to punchless stock earbuds.

Seriously upgrade your in-ear experience

Denon AH-C400 Music Maniac

Not convinced that in-ear headphones can deliver audiophile-grade, full-range sound? Let Denon's AH-C400 make a believer out of you. Small yet robust, these in-ears will blow away expectations for listeners used to punchless stock earbuds.

The AH-C400s use dual balanced armature drivers to generate stunning clarity across the musical spectrum, from deep bass to smooth mids and shimmering highs. A durable zinc die-cast housing protects the tiny drivers, isolating noise and reducing distortion so only your music comes through. The drivers are tuned for a flat, accurate response to deliver neutral sound that's free from the coloration introduced by many other headphones.

Customizable for ultimate comfort

Denon includes a wide assortment of eartips with the AH-C400, letting you find the perfect fit. This ensures not just comfort but a tight seal for optimum sound quality and noise reduction. The highly portable AH-C400 comes with a carrying case and features a Teflon-coated cable that reduces tangles. A convenient in-line remote with built-in microphone gives you iPhone®, iPod® and iPad® compatability for one-touch music playback and phone calls.

Includes the Denon Audio app

When listening to your mobile device, take advantage of the free Denon Audio app for Apple® and Android™ devices. This app features built-in graphic EQ, seamless music library integration and access to TuneIn® Radio's thousands of worldwide radio station streams.

The free Denon Audio app includes graphic EQ

Get graphic EQ with the Denon Audio app.

Product Highlights:

  • dual balanced armature drivers tuned for accurate, transparent sound
  • in-line remote and microphone for use with iPhone®, iPod® and iPad®
  • 54" teflon-coated cable prevents tangling
  • 8 pairs of eartips (silicone, double silicone and foam) for comfortable fit and noise isolation
  • designed for use with the free Denon Audio app for Apple and Android devices
  • gold-plated 1/8" to 1/4" adapter
  • carrying case with removable carabiner
  • frequency response: 4-20,000 Hz
  • sensitivity: 106 dB
  • impedance: 43 ohms
  • weight: 0.32 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • In-ear headphones (medium silicon ear tips installed) with attached 54" cord (right-angle 3.5mm plug)
  • 3.5mm-to-1/4" plug adapter
  • 3 Pairs of silicon ear tips (XS/S/L)
  • 3 Pairs of double solid silicon ear tips
  • 1 Pair of Comply Foam TX-100M ear tips
  • Artificial leather carrying case
  • Carabiner clip
  • Owner's Manual
  • Precautions on the Use of Headphones
  • Denon Service Network sheet
  • Comply Foam tips order information

Featured Video:


Denon AH-C400 Music Maniac™ Reviews

Average Customer Review(s):

(1 Review)

Great sound

Errol from New York on 4/28/2013

Crutchfield Customer Review (What's this?)

Great sound, close to reference

Pros: Light, convenient



Hands-on research

Features and Specs

Fit Style In-ear/Earbud
Earcup Type Closed
Earcup Width x Height 0.451" x 0.736"
Noise-canceling No
Bluetooth No
Mic For Taking Calls Yes
iPhone Control ---
Lightning Connector No
Android Control ---
Frequency Response 4-20k Hz
Sensitivity 106 dB
Impedance 43 Ohms
Weight 0.32 ounces
Cord Length 54"
1/4-inch Adapter Included Yes
Volume Control Yes
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Drivers: The AH-C400 Music Maniac in-ear headphones feature Denon's dual-balanced armature driver technology for studio-quality sound. These balanced armature drivers are set in a zinc die-cast housing to effectively isolate noise and enhance durability. The headphones are tuned to a flat EQ for acoustic transparency.

Compatibility: The headphones feature an in-line Apple-compatible remote control and microphone. These can control music operation on compatible Apple devices and conduct phone calls or perform voice recognition activities. The AH-C400s 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.

In-line Remote/Microphone: The integrated 3-button remote and microphone, found on the left side cable, gives you control of your iPod, iPhone, and iPad. The volume can be raised or lowered incrementally with the two outer buttons. While listening to music, you can control playback by pressing the center button 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 54" 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-C400 Music Maniac headphones are designed for comfort and fit. After studying over 4000 pairs of ears, Denon's engineers designed the earpieces to account for subtle differences in ear placement, ear canal size, head size, and jaw depression. The headphones come with multiple pairs of ear tips so you can choose the pair that gives you the best fit and performance: 4 pairs of silicon ear tips (XS, S, M, L), 3 pairs of double solid silicon ear tips (S, M, L), and a pair of Comply Foam ear tips.

Included Accessories: In addition to the ear tips, the headphones come with a zippered, artificial leather case with a detachable carabiner so you can hook the case onto a belt loop, a purse strap, or a backpack.

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.

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 verify what’s in the box, 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.

Staff Reviews

Product reviews from the Crutchfield Labs

A lot to like

Written by Ralph Graves, Staff Writer - Creative, on 9/6/2012 11:10:00 AM

There is a lot to like with these headphones. First, they came with a good selection of eartips. I found a pair that fit comfortably in my ears and provided a good seal to keep out extraneous noises in the Crutchfield Labs.

Second, the headphones have a stylish, but practical design. The earbuds are almost minimalist, which meant I could barely feel them in my ears. The in-line controller is simple to use — volume up and down buttons, with a bigger control button in between. That button controls play and pause. Here's a tip: it also lets you skip forward or back through tracks. Two quick taps for skip forward, three quick taps for skip back.

Third, the sound is just what I want in a quality set of portable headphones. The bass full, the highs clean, and there was plenty of detail in the mid-range.

What are the Labs?