In this review, we will be comparing CP-WT140LCR and CWM663, two Passive In-wall speakers from Monitor Audio and Bowers Wilkins. Let's have a brief look at the main features
of Monitor Audio CP-WT140LCR and B&W CWM663 first before getting into our more
detailed comparison.
Monitor Audio CP-WT140LCR Key Specs
- 2-way Design
- 1" Hard-Dome Tweeter
- 2 x 4" Polymer Woofer
- 60-25kHz Frequency Response
- 88 dB Sensitivity
- Impedance: 6ohms
- Power Range:20-100watts
- Dimensions (H x W x D): 299.0" x 7.1875" x 3.8125"( 299.0 x 183.0 x 97.0mm )
B&W CWM663 Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 6" Kevlar Woofer
- 45-50kHz Frequency Response
- 88 dB Sensitivity
- Impedance: 8ohms
- Power Range:25-150watts
- Dimensions (H x W x D): 280.0" x 7.2500" x 3.7500"( 280.0 x 185.0 x 96.0mm )
What size room are the Monitor Audio CP-WT140LCR and B&W CWM663 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-WT140LCR |
B&W CWM663 |
| Near-field |
Average |
Poor |
| Small Room |
Good |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Average |
| Very Large Room |
Bad |
Poor |
(* 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-WT140LCR and B&W CWM663 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
Both CP-WT140LCR and CWM663 are 2-way speakers.
| Driver |
Monitor Audio CP-WT140LCR |
B&W CWM663 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 4-inch
|
1 x 6-inch
|
CP-WT140LCR features a 1" Hard-Dome Tweeter and 2 x 4" Polymer Woofer . On the other hand, the CWM663 features a 1" Soft-Dome Tweeter and 1 x 6" Kevlar Woofer .
Frequency Response
CP-WT140LCR has a frequency range of 60-25kHz whereas CWM663 has a frequency range of 45-50kHz. With a minimum frequency of 45Hz, the CWM663 can go significantly deeper on the low side and provide stronger bass compared to the CP-WT140LCR's min frequency of 60Hz.
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-WT140LCR
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-WT140LCR is a 6 ohms speaker compared to the CWM663 which has a nominal impedance of 8 ohms.
On the other hand, they have the same sensitivity of 88 dBdB.
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-WT140LCR can handle a max power of 150 watts RMS from the amp the whereas CP-WT140LCR has a max power handling value of 100 watts RMS , 50 watts less than the CWM663.
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-WT140LCR features Spring post type posts and CWM663 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-WT140LCR's and B&W CWM663's external dimensions. Monitor Audio CP-WT140LCR has external dimensions of 299.0 x 183.0 x 97.0mm ( 11.7500-inch x 7.1875-inch x 3.8125-inch) whereas B&W CWM663 has external dimensions of 280.0 x 185.0 x 96.0mm ( 11.0000-inch x 7.2500-inch x 3.7500-inch) .
B&W CWM663 is 19mm shorter and 1mm less deeper than Monitor Audio CP-WT140LCR but it is also 2mm wider.
What's in the Box of Monitor Audio CP-WT140LCR?
Here are the items that are included inside the box of CP-WT140LCR:
In-wall LCR loudspeakerMagnetic grilleCosmetic scrimInstallation GuideImportant Safety InstructionsLimited Warranty/Registration CardMountingTemplate
What's in the Box of B&W CWM663?
Here are the items that come with the CWM663:
2 In-wall loudspeakers2 Mounting frames2 Grilles2 Paint mask2 Cut-out templatesQuick Start GuideTemplateWarranty Information
Number of Woofers 
Base Surface Area 
Max Input Power 
Nominal Impedance 
High Frequency Response 
Height 
Price per pair*