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  1. Home
  2. Passive In-wall Speakers
  3. Monitor Audio W265 vs B&W CWM663

Monitor Audio W265 vs B&W CWM663 Comparison

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Speaker to replace
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Monitor Audio W265

Passive In-wall | 55-30kHz

Monitor Audio W265
Check price atAmazon›
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B&W CWM663

Passive In-wall | 45-50kHz

Bowers & Wilkins Performance Series CWM663
Check price atAmazon›
Monitor Audio W265 Monitor Audio W265
Check price atAmazon›
B&W CWM663 B&W CWM663
Check price atAmazon›
Monitor Audio W265
See at AMAZON
B&W CWM663
See at AMAZON

Monitor Audio W265 vs B&W CWM663 Speaker Comparison

In this review, we will be comparing W265 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 W265 and B&W CWM663 first before getting into our more detailed comparison.

Key SpecsMonitor Audio W265B&W CWM663
BrandMonitor Audio
United Kingdom · founded 1972
Bowers Wilkins
United Kingdom · founded 1966
Design2-way2-way
Tweeter1" Hard-Dome1" Soft-Dome
Woofer6.5" C-CAM6" Kevlar
Frequency response55-30kHz45-50kHz
Sensitivity88.5 dB88 dB
Impedance6 ohms8 ohms
Power range20-65 watts25-150 watts
Weight2.27kg / 5lbs—
Dimensions (H x W x D)13.0625" x 8.3750" x 3.6250"
332.0 x 213.0 x 93.0mm
11.0000" x 7.2500" x 3.7500"
280.0 x 185.0 x 96.0mm

What size room are the Monitor Audio W265 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 W265 B&W CWM663
Near-field Good Poor
Small Room Good Average
Mid-size Room Average Good
Large Room Poor Average
Very Large Room No way 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.)

The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.


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


Drivers

Both W265 and CWM663 are 2-way speakers.

Tweeter - 1 inchWoofer - 6.5 inch
Monitor Audio W265
Tweeter - 1 inchWoofer - 6 inch
B&W CWM663

TweeterWoofer

Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.

Driver Monitor Audio W265 B&W CWM663
Driver Setup 2-way 2-way
Tweeter 1-inch 1-inch
Midrange - -
Woofer 1 x 6.5-inch 1 x 6-inch

W265 features a 1" Hard-Dome Tweeter and 1 x 6.5" C-CAM Woofer. On the other hand, the CWM663 features a 1" Soft-Dome Tweeter and 1 x 6" Kevlar Woofer.

Frequency Response

W265 has a frequency range of 55-30kHz 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 W265's min frequency of 55Hz.

The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the In-wall class in our database.

Low Frequency

In-wall Speakers

W265
CWM663
Min
Average
Median

Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

W265 is a 6 ohms speaker compared to the CWM663 which has a nominal impedance of 8 ohms.

These two speakers also have different sensitivity levels. W265 sensitivity is rated at 88.5 dB and the CWM663's is rated at 88 dB. This 1 dB difference makes the Monitor Audio W265 a more sensitive speaker compared to B&W CWM663, hence will play louder with the same amount of watts.

Sensitivity

In-wall Speakers

W265
CWM663
Min
Average
Median

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.

CWM663 can handle a max power of 150 watts RMS, whereas W265 has a max power handling value of 65 watts RMS, 85 watts less than the CWM663.

Note that higher power handling does not make a speaker louder: that depends mainly on sensitivity and impedance. The calculator below shows how loud each of these actually plays on a real amplifier.

Which plays louder on your amplifier?

Starting with a popular amplifier - change it to the one you own, or any you are considering, and watch both numbers move.

Monitor Audio W265
 
B&W CWM663
 

Input Type and Bi-Amping / Bi-Wiring

W265 features Spring post type posts and CWM663 has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.

Physical Specs

The size of a speaker can sometimes be 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 W265's and B&W CWM663's external dimensions. Monitor Audio W265 has external dimensions of 332.0 x 213.0 x 93.0mm (13.0625-inch x 8.3750-inch x 3.6250-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 28mm narrower and 52mm shorter than Monitor Audio W265 but it is also 3mm deeper.

Below you can see the front view size comparison of Monitor Audio W265 and B&W CWM663 in scale.

Monitor Audio W265 vs B&W CWM663 Size Comparison - Front View
Comparison image of Monitor Audio W265 and B&W CWM663 Size and External Dimensions

What's in the Box of Monitor Audio W265?

Here are the items that are included inside the box of W265:
  • In-wall speaker
  • Grille
  • Paint skim
  • Installation Guide
  • Important Safety Instructions
  • Cutout Template

What's in the Box of B&W CWM663?

Here are the items that come with the CWM663:
  • 2 In-wall loudspeakers
  • 2 Mounting frames
  • 2 Grilles
  • 2 Paint mask
  • 2 Cut-out templates
  • Quick Start Guide
  • Template
  • Warranty Information


Reasons to choose Monitor Audio W265 over Bowers & Wilkins Performance Series CWM663

Sensitivity 89 dB vs 88 dB Play louder with same amount of amplification power
Woofer Size 6.5 inches vs 6 inches Larger woofer
Price per pair* 780USD vs 900USD costs less (*prices may change depending on the seller, location and time)

Reasons to choose Bowers & Wilkins Performance Series CWM663 over Monitor Audio W265

Max Input Power 150 watts vs 65 watts Handle more power from your amplifier
Nominal Impedance 8 ohms vs 6 ohms Less selective with amplifiers
Low Frequency Response 45 Hz vs 55 Hz Generates deeper bass
High Frequency Response 50k Hz vs 30k Hz Generates higher frequency
Height 280mm vs 332mm Easier to fit in smaller spaces
Base Surface Area 177cm2 vs 198cm2 Takes less floor space

Monitor Audio W265 vs B&W CWM663 Specs Table

Detailed comparison of specifications
General Monitor Audio W265 Bowers & Wilkins Performance Series CWM663
Brand Monitor Audio Bowers Wilkins
Speaker Type Passive In-wall Speaker Passive In-wall Speaker
Power Range 20-65 watts 25-150 watts
Sensitivity 88.5 dB 88 dB
Impedance 6 ohms 8 ohms
Frequency Response 55-30kHz 45-50kHz
Drivers
Woofer Quantity 1 1
Woofer Size 6.5" 6"
Woofer Composition C-CAM Kevlar
Woofer Surround Material Rubber Rubber
Tweeter Size 1" 1"
Tweeter Type Hard-Dome Soft-Dome
Aimable Tweeter Yes No
Midrange Driver No No
Physical Specs
Height 332.0mm (13.1") 280.0mm (11")
Width 213.0mm (8.4") 185.0mm (7.3")
Depth 93.0mm (3.7") 96.0mm (3.8")
Weight 2.27kg (5lbs) n/a
Enclosure In-wall In-wall
Moisture Resistancy No No
Connections
Biamp Inputs No No
Other
Parts Warranty Lifetime 5 Years
Labor Warranty Lifetime 5 Years

Verdict

No single best speaker here - they are built to different priorities, and the right one depends on your room, your amplifier and what you listen to.

AreaBetterWhy
BassBB&W CWM663 digs deeper - 45Hz against 55Hz.
Amplifier needsevenly matchedSimilar sensitivity (89dB vs 88dB) - both want much the same power.
Amplifier matchBB&W CWM663 is the easier load at 8 ohms.
HeadroomBB&W CWM663 takes more power (150W vs 65W) - more in hand in a big room.
SizedependsB&W CWM663 is easier to place; Monitor Audio W265 is bigger, which usually goes with fuller bass. Your room decides.
PriceAMonitor Audio W265 is cheaper - $780 against $900, about 13% less.

A Monitor Audio W265  B B&W CWM663
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.

Which should you choose?

B&W CWM663 leads across most of the measured areas for a fairly modest premium, which makes it the easier pick if the budget stretches. Monitor Audio W265 is the one to take if it does not. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 55Hz anyway, which makes the cheaper Monitor Audio W265 much easier to justify. Match it to your room: we rate Monitor Audio W265 the better fit for near-field listening and a small room, and B&W CWM663 for a mid-size room and a large room.

And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.


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