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Definitive UIW RLS II vs MartinLogan Motion XT CI XTW6 Comparison

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Definitive UIW RLS II

Passive In-wall | 22-30kHz

Definitive Technology UIW RLS II
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MartinLogan Motion XT CI XTW6

Passive In-wall | 56-25kHz

MartinLogan Motion XT CI XTW6
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Definitive UIW RLS II Definitive UIW RLS I...
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MartinLogan Motion XT CI XTW6 MartinLogan Motion X...
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Definitive UIW RLS II vs MartinLogan Motion XT CI XTW6 Speaker Comparison

In this review, we will be comparing UIW RLS II and Motion XT CI XTW6, two Passive In-wall speakers from Definitive Technology and MartinLogan.

Let's have a brief look at the main features of Definitive UIW RLS II and MartinLogan Motion XT CI XTW6 first before getting into our more detailed comparison.

Definitive UIW RLS II Key Specs

  • 2-way Design
  • 1" Hard-Dome Tweeter
  • 2 x 6.5" Polypropylene Woofer
  • 22-30kHz Frequency Response
  • 92 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:10-350watts
  • Dimensions (H x W x D): 724.0" x 7.0000" x 3.8750"( 724.0 x 178.0 x 99.0mm )

MartinLogan Motion XT CI XTW6 Key Specs

  • 2-way Design
  • 1.27 x 2.4" Folded Motion Ribbon Tweeter
  • 6.5" Kevlar Woofer
  • 56-25kHz Frequency Response
  • 91 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:50-100watts
  • Dimensions (H x W x D): 258.0" x 7.0000" x 3.4375"( 258.0 x 178.0 x 88.0mm )

What size room are the Definitive UIW RLS II and MartinLogan Motion XT CI XTW6 speakers good for?

The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:

Listening Environment* Definitive UIW RLS II MartinLogan Motion XT CI XTW6
Near-field Are you nuts? Average
Small Room Bad Good
Mid-size Room Poor Average
Large Room Good Poor
Very Large Room Good Bad

(* 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.)

In the following sections, we will get into more detail in order to better understand how the Definitive UIW RLS II and MartinLogan Motion XT CI XTW6 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**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.


Drivers

Both UIW RLS II and Motion XT CI XTW6 are 2-way speakers.

Driver Definitive UIW RLS II MartinLogan Motion XT CI XTW6
Driver Setup 2-way 2-way
Tweeter 1-inch 1.27 x 2.4-inch
Midrange - -
Woofer 2 x 6.5-inch 1 x 6.5-inch

UIW RLS II features a 1" Hard-Dome Tweeter and 2 x 6.5" Polypropylene Woofer . On the other hand, the Motion XT CI XTW6 features a 1.27 x 2.4" Folded Motion Ribbon Tweeter and 1 x 6.5" Kevlar Woofer .

Frequency Response

UIW RLS II has a frequency range of 22-30kHz whereas Motion XT CI XTW6 has a frequency range of 56-25kHz. With a minimum frequency of 22Hz, the UIW RLS II can go significantly deeper on the low side and provide stronger bass compared to the Motion XT CI XTW6's min frequency of 56Hz.

Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the In-wall class in our database.

Low Frequency

In-wall Speakers

UIW RLS II
Motion XT CI XTW6
Min
Average
Max
High Frequency

In-wall Speakers

Definitive UIW RLS II
MartinLogan Motion XT CI XTW6
Min
Average
Max

None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

UIW RLS II and Motion XT CI XTW6 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. UIW RLS II sensitivity is rated at 92 dB and the Motion XT CI XTW6's is at 91 dB. This 1 dB difference makes the Definitive UIW RLS II a more sensitive speaker compared to MartinLogan Motion XT CI XTW6, hence will play louder with the same amount of watts.

Sensitivity

In-wall Speakers

UIW RLS II
Motion XT CI XTW6
Min
Average
Max

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.

UIW RLS II can handle a max power of 350 watts RMS from the amp the whereas Motion XT CI XTW6 has a max power handling value of 100 watts RMS, 250 watts less than the UIW RLS II.

Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.

Input Type and Bi-Amping / Bi-Wiring

UIW RLS II features Spring post type posts and Motion XT CI XTW6 has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.

Physical Specs

Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Definitive UIW RLS II's and MartinLogan Motion XT CI XTW6's external dimensions. Definitive UIW RLS II has external dimensions of 724.0 x 178.0 x 99.0mm ( 28.5000-inch x 7.0000-inch x 3.8750-inch) whereas MartinLogan Motion XT CI XTW6 has external dimensions of 258.0 x 178.0 x 88.0mm ( 10.1250-inch x 7.0000-inch x 3.4375-inch) .

What's in the Box of Definitive UIW RLS II?

Here are the items that are included inside the box of UIW RLS II:
  • In-wall loudspeaker
  • Grille
  • Self-adhesive foam gasket
  • Paint mask
  • Wall-Mount Template
  • Owners Manual
  • Online Product Registration Card
  • What's in the Box of MartinLogan Motion XT CI XTW6?

    Here are the items that come with the Motion XT CI XTW6:
  • In-wall loudspeaker
  • Grille
  • T20 torx-bit
  • User-feets Manual
  • Cutout Template

  • Reasons to choose Definitive Technology UIW RLS II over MartinLogan Motion XT CI XTW6
    Max Input Power 350 watts vs 100 watts Handle more power from your amplifier
    Sensitivity 92 dB vs 91 dB Play louder with same amount of amplification power
    Number of Woofers 2 vs 1 More woofers
    Low Frequency Response 22 Hz vs 56 Hz Generates deeper bass
    High Frequency Response 30k Hz vs 25k Hz Generates higher frequency
    Passive Radiator 2 x 6.5-inch vs None Increases the bass performance

    Reasons to choose MartinLogan Motion XT CI XTW6 over Definitive Technology UIW RLS II

    Height 258mm vs 724mm Easier to fit in smaller spaces
    Base Surface Area 156cm2 vs 176cm2 Takes less floor space
    Price per pair* 1600USD vs 1998USD costs less (*prices may change depending on the seller, location and time)
    Definitive UIW RLS II vs MartinLogan Motion XT CI XTW6 Specs Table
    Detailed comparison of specifications
    General Definitive Technology UIW RLS II MartinLogan Motion XT CI XTW6
    Brand Definitive Technology MartinLogan
    Speaker Type Passive In-wall Speaker Passive In-wall Speaker
    Power Range 10-350 watts 50-100 watts
    Sensitivity 92 dB 91 dB
    Impedance 8 ohms 8 ohms
    Frequency Response 22-30kHz 56-25kHz
    Drivers
    Woofer Quantity 2 1
    Woofer Size 6.5" 6.5"
    Woofer Composition Polypropylene Kevlar
    Woofer Surround Material Butly Rubber Rubber
    Tweeter Size 1" 1.27 x 2.4"
    Tweeter Type Hard-Dome Folded Motion Ribbon
    Aimable Tweeter No No
    Midrange Driver N/A" N/A"
    Physical Specs
    Height 724.0mm (28.5") 258.0mm (10.2")
    Width 178.0mm (7") 178.0mm (7")
    Depth 99.0mm (3.9") 88.0mm (3.5")
    Enclosure In-wall In-wall
    Moisture Resistancy Yes No
    Connections
    Biamp Inputs No No
    Other
    Parts Warranty 5 Years 5 Years
    Labor Warranty 5 Years 5 Years

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