Definitive Technology UIW RLS III is a 2-way Passive In-wall In-wall speaker by Definitive Technology. It was released in 2017. It features a 1" Hard-Dome Tweeter and 2 x 5.25" Polypropylene Woofer. UIW RLS III also employs 2 x 5.25-inch passive radiators. The speaker has a frequency range of 24-30kHz and a sensitivity of 92 dB. Definitive UIW RLS III has an MSRP of 1398$ per pair.
Room Size Suitability
The size of the room where you plan to use the Definitive UIW RLS 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-field | Are you nuts? |
| Small Room | Bad |
| Mid-size Room | Poor |
| Large Room | Good |
| Very Large Room | Good |
(* 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.)
Definitive Technology replaced the older UIW RLS II with this model. Follow the link to read our detailed comparison of these models:
Compare Definitive UIW RLS III vs Definitive UIW RLS II
Definitive Technology's UIW Series of Loudspeakers
UIW RLS III is a member of Definitive Technology's UIW series of Passive speakers. The UIW range are Definitive Technology's Ultra In-Wall reference custom-install speakers. Below you can see the main specs of these speakers.
See all 4 Definitive Technology UIW models compared »
Definitive Technology UIW Series Speakers
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Frequency Response of the Definitive UIW RLS III Speaker
Definitive UIW RLS III has a Frequency response range of 24-30kHz and Power Range of 10-325 watts. With a minimum frequency of 24 Hz, UIW RLS 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.
Here we have a comparison of how UIW RLS III's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
In-wall Speakers
Thinking about a subwoofer for the Definitive UIW RLS III?
Impedance and Sensitivity
Definitive UIW RLS III's nominal impedance level is
8 ohms and has a sensitivity of
92 dB.
Sensitivity
In-wall Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Definitive Technology UIW RLS III is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
92dB of the Definitive Technology UIW RLS III is considered a high sensitivity compared to average stereo speaker which makes UIW RLS III an easy to drive from Sensitivity perspective. If you are planning to power your speaker with a Tube amp which are generally very low power, the Definitive UIW RLS III will be a good choice. Work out how loud the Definitive UIW RLS III plays in your room →
What amplifier does the Definitive UIW RLS III need?
At normal listening levels in a medium room, about
4.7–75 W
per channel into 8 ohms.
Set your own conditions and we will rank every amplifier we cover.
Prefer to browse? Integrated amplifiers under $1,500, or every amplifier we cover.
Input Type
UIW RLS III features Spring post type connectors. Bi-amping and Bi-wiring are not possible.
Work out what gauge speaker cable this run needs →
Definitive UIW RLS III External Dimensions and Weight
Definitive UIW RLS III has external dimensions of (Height x Width x Depth) 23.7500-inch x 5.8750-inch x 3.8750-inch (604.0 x 150.0 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 RLS III is approximately 148.5cm2 / 23.0inch2.
Find speakers that fit your shelf or alcove →
How does the Definitive UIW RLS III compare to the Definitive Technology UIW RLS II?
One of the natural alternative to the Definitive UIW RLS III is the UIW RLS II which is located one step higher in Definitive Technology's Passive In-wall selection.
Check the Detailed Comparison of Definitive UIW RLS III vs UIW RLS II for more details.
Cabinet type and Materials
Definitive UIW RLS III has a
In-wall type cabinet.
What's in the Box of Definitive UIW RLS III?
Here are the items that are included inside the box of UIW RLS III:
- In-wall loudspeaker
- Grille
- Self-adhesive foam gasket
- Paint mask
- Wall-Mount 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 RLS III.
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.