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Definitive Technology UIW RCS II 2-Way In-Ceiling Reference Speaker with 2x 5.25" Woofer, White

SKU: DEUIWRCSII MFR: UDSA
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Key Features

  • Experience audiophile-grade sound with this in-ceiling speaker's precise tweeter!
  • Enjoy deep, rich bass from dual 5.25" woofers, enhancing your home theater audio.
  • Achieve seamless aesthetics; paint the grille to match your decor for a custom look.
  • Benefit from wide dispersion, ensuring balanced sound throughout your listening area.
  • Install easily in any room; perfect for immersive surround sound or whole-house audio.
  • Expect lasting performance with Definitive Technology's 5-year limited speaker warranty.
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Special Order?Estimated to Ship: 08/08/2025
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Reviews about this item

Review Summary

2023-07-18T20:00:00

Rated 5 out of 5

Outstanding Audio

I have been an audiophile since I installed my first car stereo speaker. But, I've always felt that the standard 3-way speaker left something out of what I would call a full range speaker. Ever since I've been focused on a fuller 4-way system. When I first heard the RCS II line (5.1 system with Anthem MRX-520), I cried. It was like the end of a quest. There are many options out there now to replicate a fuller audio spectrum, but I've installed these same speakers in two home theaters now and the sound is outstanding.

ThePCWhisperer

2023-01-08T19:00:00

Rated 5 out of 5

UIW RCS II review and installation tips

I absolutely love the speakers. I replaced AIM EIGHT 5's for my in-ceiling FR/FL/FC with these UIW RCS II's. I'm running these on a Marantz SR 8015. The depth and richness of sound is pretty incredible and exceeded my expectations with my in-ceiling set up. I seriously can't get enough time with these. They sound awesome! My surrounds are AIM EIGHT 5's and my rear surrounds are AIM EIGHT 3's. Installation is straightforward if you take the time to read the included instructions. My ONLY complaint with the speakers was the hardware provided for mounting the speaker box to the ceiling joists. I HIGHLY recommend buying better wood screws than the ones provided. On the first speaker the first screw broke off, the second screw stripped out. This could have been catastrophic had the first one not broken in exactly the way it did and if the second screw stripped out any earlier than it did. My only issue now will be if I ever need to remove the speaker for any reason. For any DIYer's, I suggest Grip Rite #8 x 2-1/4" Trim Head construction screws w/ T-15 Star Drive (bit is included with screws). You will thank me. One other minor complaint...a better description of where to apply the included baffling tape would be helpful. You'll figure it out after the first speaker, but a clear drawing or picture in the instructions would be save some time and frustration (the backing tape is very sticky so get it right the first time).

DN619

2022-08-07T20:00:00

Rated 5 out of 5

Before you buy anything else

I have three sets of these amazing loudspeakers?. I believe they are the most undervalued in wall in ceiling speaker on the market.

Wells

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Definitive Technology UIW RCS II Specifications

  • Color

    White

  • Driver Complement

    1x 1" (2.54cm) d (Round) Tweeter - Tweeter
    2x 5.25" (13.34cm) d (Round) Midrange - Tweeter
    2x 6.5" (16.51cm) d (Round) Bass Radiator - Tweeter

  • Total Frequency Response

    22 Hz-30,000 Hz

  • Nominal Impedance Range

    8 ohms

  • Sensitivity (1 watt @ 1 meter)

    92 dB

  • Dimensions (H x W)

    Grille: 15.5 x 15.5" (39.37 x 39.37cm)

  • UPC Code

    093207051692

About Definitive Technology UIW RCS II

FEATURED REVIEWS

UIW RCS II review and installation tips

By DN619

I absolutely love the speakers. I replaced AIM EIGHT 5's for my in-ceiling FR/FL/FC with these UIW RCS II's. I'm running these on a Marantz SR 8015. The depth and richness of sound is pretty incredible and exceeded my expectations with my in-ceiling set up. I seriously can't get enough time with these. They sound awesome! My surrounds are AIM EIGHT 5's and my rear surrounds are AIM EIGHT 3's. Installation is straightforward if you take the time to read the included instructions....

View full Review

Before you buy anything else

By Wells

I have three sets of these amazing loudspeakers?. I believe they are the most undervalued in wall in ceiling speaker on the market.

Let the UIW RCS II 2-Way In-Ceiling Reference Speaker with 2x 5.25" Woofer in white transform your audio experience. This state-of-the-art in-ceiling speaker, expertly designed to be virtually invisible, delivers a rich, immersive sound that fills your space from above. With technology that has been perfected over decades, you'll appreciate the superior audio quality in an instant.

Experience the thrill of front-row audio with our patented Wave Launch technology. The UIW RCS II speaker features two cast-basket midrange/woofers and a 1" pure aluminum dome tweeter, all precisely aimed and angled downward towards your listening area. This unique configuration ensures a full, dynamic audio experience that brings your favorite music and movies to life.

The speaker's deep bass and high punch are delivered by a pair of cast-basket drivers and pressure-coupled low bass radiators. The 1" aluminum dome tweeter extends the range, delivering clear, dynamic highs that reach beyond the audible range, ensuring a distortion-free, high-frequency response.

The UIW RCS II's 5.25" midrange/woofer drivers, featuring butyl rubber surrounds and rigid polypropylene cones in cast baskets, provide superior midrange and bass performance. These drivers offer a greater cone excursion than other comparably-sized drivers, resulting in a compact, stealthy package that doesn't compromise on sound quality.

The speaker also includes twin 6.5" passive bass radiators, which create more bass than comparably sized sealed or ported designs. This extra surface area moves more air, resulting in a deeper, more powerful low end that works beautifully on its own or seamlessly integrates with subwoofers at various crossover points.

The UIW RCS II speaker is fully enclosed and sealed with dense, acoustically inert, anti-resonant, anti-vibration Medite wood. This ensures loud, accurate, uncolored midrange and tight, powerful bass with no buzzing or sound leakage into walls and ceilings.

Whether you're installing in new or existing construction, walls or ceilings, residential or commercial spaces, the UIW RCS II speaker offers simple, secure installation. With features like metal pivoting lock arms and paintable grilles and frames, these speakers are designed to provide both installation simplicity and superior sound quality.

Experience the ultimate in-wall series speakers, designed with the same driver technologies as our flagship floorstanding speakers. The UIW RCS II 2-Way In-Ceiling Reference Speaker with 2x 5.25" Woofer in white delivers freestanding speaker-level performance from within your ceiling and walls, redefining your audio experience.

Definitive Technology UIW RCS II Features

  • Incorporates high power, high definition cast basket Definitive bass/midrange drivers combined with pressure-coupled low frequency radiators and state-of-the-art Definitive 1" dome tweeters
  • Incorporates polypropylene cones with butyl rubber surrounds
  • Incorporates a complete precision crossover system designed by Definitive engineers for seamless driver blending
  • Incorporates a completely sealed non-resonant medite enclosure to assure you of laboratory reference quality performance in your home
  • Is moisture resistant to allow use in bathrooms, etc
  • Is easily paintable and comes complete with mounting templates and plastic paint masks
  • Can be used as an exceptional left main, right main, center channel or rear/side surround in a state-of-the-art home theater system or as stereo pairs in a 2-channel music system

Key Features

  • Experience audiophile-grade sound with this in-ceiling speaker's precise tweeter!
  • Enjoy deep, rich bass from dual 5.25" woofers, enhancing your home theater audio.
  • Achieve seamless aesthetics; paint the grille to match your decor for a custom look.
  • Benefit from wide dispersion, ensuring balanced sound throughout your listening area.
  • Install easily in any room; perfect for immersive surround sound or whole-house audio.
  • Expect lasting performance with Definitive Technology's 5-year limited speaker warranty.

What's in the box:

  • Definitive Technology UIW RCS II 2-Way Reference In-Ceiling Speaker (White)
  • Wall Mounting Template
  • Paint Mask
  • Paintable Grille
  • Self Adhering Foam Gasket
  • Definitive Technology 5 Year Limited Warranty