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In-ceiling speakers

Item # 228IC4

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Our take on the NHT iC4

An optional iCB8 in-ceiling bracket is recommended for installing the iC4 in a home with new construction.

25 years of audio know-how in every in-ceiling speaker

NHT is renowned for exceptional sound. Even their name invites you to "Now Hear This." The iC4 is the "big daddy" of the NHT in-ceiling lineup. It packs a cluster of three 1" fluid-cooled aluminum dome tweeters to weave a blanket of sound over your space so you don't just get a "sweet spot" you get a sweet room. The tweeter array is centered inside of an 8" aluminum woofer to bring the subtleties of musical instruments and dialogue to life, as well as the power of percussion instruments and percussive movie soundtracks. This array is packaged in a slim, circular design that mounts discreetly in your ceiling. It all adds up to a high-fidelity speaker that can be placed where traditional speakers can't go, or would simply be in the way. For optimal performance, give them plenty of clean power, and you'll be rewarded with rich sonic goodness.

The beauty's in the details

You'll love the design details of these NHTs. Their super-accurate aluminum drivers deliver wide frequency response and are mounted securely in a low-resonance frame. Moisture-resistant materials and a gasketed mounting ring let you install these speakers in any room in the house, including kitchen and bath, worry-free. The spring-loaded mounting cams help ensure that the iC4s will install firmly without coming loose or cracking the surrounding drywall over time, so you can expect years of fine performance. Just prepare the opening in your ceiling and run UL-rated wiring from your receiver and you can secure this flush-mount speaker with a few turns of a screwdriver. And you can paint the white matte grilles to match any décor.

An optional iCB8 in-ceiling bracket is recommended for installing the iC4 in a home with new construction.

Got wire?

Most speakers don't include any. Learn more about in-wall wiring at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • array of three 1" aluminum dome tweeters for wide sound dispersion
  • long-throw 8" aluminum woofer
  • handles up to 150 watts
  • moisture-resistant materials allow safe use in bathrooms, kitchens, and saunas
  • not recommended for outdoor use
  • frequency response 40-20,000 Hz (±3dB)
  • sensitivity 87 dB
  • 8-ohm impedance
  • paintable aluminum speaker grilles
  • cutout dimensions: 10-1/16" diameter
  • mounting depth: 4-13/16"
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 In-ceiling speakers
  • 2 Grilles
  • 2 Diffusers
  • 8 Mounting screws
  • Dum-dum
  • Grille removal-tool
  • 2 Cardboard templates/paint shieds
  • Owner's Manual
  • "Improve Your In-Wall Performance" sheet
  • Product Registration Card

Hands-on research

Features and Specs

Quantity in Package Pair
Tweeter Dome
Midrange Size N/A
Woofer Size 8
Cutout Size 10.0625
Woofer Composition Aluminum
Woofer Surround Rubber
Power Range (Watts) 10-150
Sensitivity 87 dB
Impedance (Ohms) 8
Frequency Response 40-20kHz
Connector Type Spring posts
Bi-Amp Inputs No
Enclosure Type In-ceiling
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research



Overview: The NHT iC4 in-ceiling speaker features an all aluminum version of NHT's patented 3-tweeter array that produces a flat frequency response up to 60° off-axis and creates a consistent sound-field. The iC4 is recommended for the most critical fixed-installation and distributed sound applications in your home, office or in commercial installations. It is suitable for the highest performance home theaters, high end stereo system, dens, dining rooms, master bedrooms, patios where high quality sound is desired.

2-Way Coaxial/3-Tweeter Array: The NHT iC4 in-ceiling speaker is a very high quality 2-way system; employing an 8" long-throw, anodized aluminum woofer and coaxially mounted tweeter array, which consists of three 1" fluid-cooled aluminum dome tweeters.

Crossover Network: The drivers are managed by a very high quality 2nd order crossover network (1.6kHz, 18dB/oct HP, 6dB/oct LP).

Diffuser: A proprietary diffuser is also included for inside the grille center, which provides a smooth response when a listener is located directly under the speaker.

Moisture Resistant: The driver units are moisture resistant, the frame is polypropylene, all the hardware is stainless steel, and the mounting lip has a foam gasket. This allows the in-ceiling speaker to be installed in moisture prone interior environments, such as bathrooms, indoor swimming pools, and sauna rooms.

Note: Installation in outdoor locations is not recommended.

Spring Post Terminals: The in-ceiling speaker features gold-plated, spring-post terminals which will maintain contact with the speaker wire over the life of the installation.

Note: 16-AWG, 2-conductor in-ceiling speaker wire is recommended for runs of 10 feet or less, with heavier gauge cable used for longer runs.


Dog-Ear Clamping System: The NHT iC4 in-ceiling speaker has a fail-proof, 4-point spring-loaded, dog ear clamping system that grabs the ceiling's surface with integrity and simplicity, even when the mounting surface is uneven. The spring-loaded clamps maintain the bezel's pressure and seal with the ceiling surface and therefore eliminates the speaker from coming loose and paint lines from cracking over the life of the installation. This feature is important because typical sheetrock compresses when clamped; non-spring loaded, rigid clamping systems will become loose over time and begin to vibrate and the air seal can leak causing the speaker to lose bass and crack the paint line.

Note: NHT in-ceiling loudspeakers are designed for in-ceiling installation between standard wood joists. The four spring-loaded dog ear clamps can accommodate ceilings 0.25" to 1.5" thick.

Cut-Out Template: A convenient cardboard template for the in-ceiling speaker's cutout is included to make installation location and retrofit cutting easier.

Paintable: The iC4 is painted with a neutral white primer and may be painted to match your ceiling decor with typical latex paints. A convenient paint shield is included to protect the drive units in the speaker frame. Take care not to cover the grille's tiny perforated holes, which are essential to sound performance.

Note: Do not attempt to paint the black baffle surface (which houses the drivers). Its black finish prevents the speaker's black drivers from being visible once the grille is attached.

New Construction Bracket (optional): For new construction, NHT makes the ICB8 (228ICB8, sold separately); a new construction framing bracket which lets you accurately place the iC4 in-ceiling speakers location during the framing stages of construction much like a recessed lighting fixture. The iCB8 provides a lip that the sheetrock or wall finishing crew uses to mount the NHT iC4, once the ceiling is installed.

Note: The iCB8 is not required for retrofit installations in existing ceilings.

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.