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Definitive Technology UIW RSS III Review
Definitive Technology UIW RSS III

Main Features

  • 1" Hard-Dome Tweeter
  • 2 x 3.5" Polypropylene Woofer
  • 2 x 3.5-inch Passive Radiators
  • 40-30kHz Frequency Response
  • 90 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: 10-200watts
  • Dimensions(HxWxD): 9.8750"x8.3750"x3.8750" / 251.0 x 213.0 x 99.0mm
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Definitive UIW RSS III Review
Definitive UIW RSS III Definitive UIW RSS I...
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Definitive Technology UIW RSS III is a 2-way Passive In-wall In-wall speaker by Definitive Technology. It features a 1" Hard-Dome Tweeter and 2 x 3.5" Polypropylene Woofer. UIW RSS III also employs 2 x 3.5-inch passive radiators. The speaker has a frequency range of 40-30kHz and a sensitivity of 90 dB. Definitive UIW RSS III has an MSRP of 1098$ per pair.

Room Size Suitability

The size of the room where you plan to use the Definitive UIW RSS III is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:

Listening Environment* Suitability
Near-fieldPoor
Small RoomAverage
Mid-size RoomGood
Large RoomAverage
Very Large RoomPoor

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Frequency Response of the Definitive UIW RSS III Speaker

Definitive UIW RSS III has a Frequency response range of 40-30kHz at ±3dB and Power Range of 10-200 watts. With a minimum frequency of 40 Hz, UIW RSS III delivers deep bass that will likely satisfy most listeners, especially those who enjoy music. However, movie enthusiasts and music fans who prefer a full range of sound may still benefit from adding a subwoofer.

To focus on the subwoofers that are in a similar price range with Definitive UIW RSS III, check out the Powered Subwoofers under $1500. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how UIW RSS III's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
In-wall Speakers
Definitive UIW RSS III
Min
Average
Max
High Frequency
In-wall Speakers
Definitive UIW RSS III
Min
Average
Max

Impedance and Sensitivity

Definitive UIW RSS III's nominal impedance level is 8 ohms and has a sensitivity of 90 dB.

Sensitivity
In-wall Speakers
Definitive UIW RSS III
Min
Average
Max

8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Definitive Technology UIW RSS III is not considered a difficult to drive speaker from nominal Impedance perspective.

Sensitivity

90dB of the Definitive Technology UIW RSS III is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise.

Check the amplifiers that are in a similar price range to the Definitive UIW RSS III:

  • Integrated Amps under 1000 USD
  • Integrated Amps under 1500 USD
  • Integrated Amps under 2000 USD
  • All Integrated Amplifiers

Input Type

UIW RSS III features Spring post type connectors. Bi-amping and Bi-wiring are not possible.

Definitive UIW RSS III External Dimensions and Weight

Definitive UIW RSS III has external dimensions of (Height x Width x Depth) 9.8750-inch x 8.3750-inch x 3.8750-inch (251.0 x 213.0 x 99.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of Definitive UIW RSS III is approximately 210.9cm2 / 32.7inch2.

How does the Definitive UIW RSS III compare to the Definitive Technology UIW RSS II?

One of the natural alternative to the Definitive UIW RSS III is the UIW RSS II which is located one step higher in Definitive Technology's Passive In-wall selection.

Check the Detailed Comparison of Definitive UIW RSS III vs UIW RSS II for more details.

Cabinet type and Materials

Definitive UIW RSS III has a In-wall type cabinet.

What's in the Box of Definitive UIW RSS III?

Here are the items that are included inside the box of UIW RSS III:
  • In-wall/In-cieling bipolar speaker
  • Grille
  • 7 Foam strips
  • 2 Screws
  • Paint mask
  • Wall template
  • Owners Manual
  • Online Product Registration Card
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the Definitive Technology UIW RSS III.

    • Speaker Cable and Connectors
      • Speaker Cables with Banana Plugs: If you know the lenght of the cable you need, this is the easier option to connect your speakers with your amp.
      • Speaker Cables without Connectors: If you are not sure about the lenght or need longer than standard cables with plugs, choose this option.
      • Banana Connectors and Plugs: If you chose the cables without connectors option or already have some cable around, pick the banana plugs separately.
    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

    Warranty

    5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.

    Definitive Technology UIW RSS III Alternatives in Passive In-wall Speakers
    Model Type Sensitivity Impedance Frequency
    Definitive UIW RSS II
    Compare
    2-way 90 dB 8 ohms 26-30kHz
    Focal 100 IW LCR5
    Compare
    2-way 90.5 dB 8 ohms 55-23kHz
    Definitive UIW RLS III
    Compare
    2-way 92 dB 8 ohms 24-30kHz
    Monitor Audio CP-WT150
    Compare
    2-way 85 dB 6 ohms 75-25kHz
    JBL Studio 6 88LCR
    Compare
    2-way 96 dB 6 ohms 43-20kHz
    Monitor Audio W250-LCR
    Compare
    2-way 88 dB 8 ohms 60-30kHz
    Polk Audio 265-LS
    Compare
    3-way 91 dB 8 ohms 28-33kHz
    Definitive UIW RLS II
    Compare
    2-way 92 dB 8 ohms 22-30kHz
    Frequently Asked Questions about Definitive Technology UIW RSS III
    What is the External Dimensions of Definitive Technology UIW RSS III
    What is the Speaker Sensitivity of Definitive Technology UIW RSS III
    is the Definitive Technology UIW RSS III an easy to drive speaker?

    Definitive UIW RSS III Detailed Specifications

    General
    BrandDefinitive Technology
    Full Model NameDefinitive Technology UIW RSS III
    Speaker Type2-way In-wall
    Power Range10-200 watts
    Sensitivity90 dB
    Impedance8 ohms
    Frequency Response40-30kHz
    DRIVERS
    Woofer Size3.5-inch
    Woofer CompositionPolypropylene
    Woofer SurroundButyl Rubber
    Tweeter Size1-inch
    Tweeter TypeHard-Dome
    Aimable TweeterNo
    Midrange SizeN/A-inch

    CONNECTIONS
    Connector TypeSpring post
    Biamp InputsNo
    PHYSICAL SPECS
    Height251.0mm ( 9.8750-inch)
    Width213.0mm ( 8.3750-inch)
    Depth99.0mm ( 3.8750-inch)
    Height251.0mm ( 9.8750-inch)
    Weightkg ( lbs)
    EnclosureIn-wall
    Moisture ResistanceYes
    OTHER
    Handheld RemoteNo
    Parts Warranty5 Years
    Labor Warranty5 Years
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