In this review, we will be comparing CP-WT380IDC and Motion XT CI XTW6, two Passive In-wall speakers from Monitor Audio and MartinLogan. Let's have a brief look at the main features
of Monitor Audio CP-WT380IDC and MartinLogan Motion XT CI XTW6 first before getting into our more
detailed comparison.
Monitor Audio CP-WT380IDC Key Specs
- 3-way Design
- 1" Hard-Dome Tweeter
- 4" Midrange
- 8" C-CAM Woofer
- 50-30kHz Frequency Response
- 89 dB Sensitivity
- Impedance: 6ohms
- Power Range:30-120watts
- Dimensions (H x W x D): 437.0" x 10.5625" x 3.8750"( 437.0 x 269.0 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 Monitor Audio CP-WT380IDC 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* |
Monitor Audio CP-WT380IDC |
MartinLogan Motion XT CI XTW6 |
| Near-field |
Poor |
Average |
| Small Room |
Average |
Good |
| Mid-size Room |
Good |
Average |
| Large Room |
Average |
Poor |
| Very Large Room |
Poor |
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 Monitor Audio CP-WT380IDC 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.
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Drivers
One of the fundamental differences between these two speakers is that CP-WT380IDC is a 3-way design whereas the Motion XT CI XTW6 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
Monitor Audio CP-WT380IDC |
MartinLogan Motion XT CI XTW6 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1.27 x 2.4-inch
|
|
Midrange
|
1 x 4-inch |
- |
|
Woofer
|
1 x 8-inch
|
1 x 6.5-inch
|
CP-WT380IDC features a 1" Hard-Dome Tweeter , a 4" Midrange and 1 x 8" C-CAM 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
CP-WT380IDC has a frequency range of 50-30kHz whereas Motion XT CI XTW6 has a frequency range of 56-25kHz. With a minimum frequency of 50Hz, the CP-WT380IDC 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
High Frequency
In-wall Speakers
Monitor Audio CP-WT380IDC
MartinLogan Motion XT CI XTW6
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
CP-WT380IDC is a 6 ohms speaker compared to the Motion XT CI XTW6 which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. CP-WT380IDC sensitivity is rated at 89 dB and the Motion XT CI XTW6's is rated at 91 dB. This 2 dB difference makes the MartinLogan Motion XT CI XTW6 a more sensitive speaker compared to Monitor Audio CP-WT380IDC, hence will play louder with the same amount of watts.
Sensitivity
In-wall Speakers
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.
CP-WT380IDC can handle a max power of 120 watts RMS from the amp the whereas Motion XT CI XTW6 has a max power handling value of 100 watts RMS, 20 watts less than the CP-WT380IDC.
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
CP-WT380IDC 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 Monitor Audio CP-WT380IDC's and MartinLogan Motion XT CI XTW6's external dimensions. Monitor Audio CP-WT380IDC has external dimensions of 437.0 x 269.0 x 99.0mm ( 17.1875-inch x 10.5625-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) .
Monitor Audio CP-WT380IDC is clearly the larger of the two speakers. Its body is 91mm wider, 179mm taller and 11mm deeper than MartinLogan Motion XT CI XTW6.
What's in the Box of Monitor Audio CP-WT380IDC?
Here are the items that are included inside the box of CP-WT380IDC:
In-Wall speakerMagnetic grillePaint skimInstallation GuideImportant Safety InstructionsLimited Warranty/Registration CardMountingTemplate
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 loudspeakerGrilleT20 torx-bitUser-feets ManualCutout Template
Max Input Power 
Driver Setup 
Woofer Size 
High Frequency Response 
Sensitivity 
Nominal Impedance 
Height 
Base Surface Area 
Price per pair*