In this review, we will be comparing MSX Sub 200 and Monitor XT12, two Powered Subwoofer speakers from Cambridge Audio and Polk Audio. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of Cambridge Audio MSX Sub 200 and Polk Monitor XT12 first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both Cambridge Audio MSX Sub 200and Polk Monitor XT12 have a single woofer setup however the Cambridge Audio MSX Sub 200's woofer is 6.5-inch whereas the Polk Monitor XT12 features a 12-inch woofer.
Frequency Response
MSX Sub 200 has a frequency range of 36-200 Hz whereas Monitor XT12 has a frequency range of 24-160 Hz. With a minimum frequency of 24Hz, the Monitor XT12 can go significantly deeper on the low side and provide stronger bass compared to the MSX Sub 200's min frequency of 36Hz.
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 Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
Cambridge Audio MSX Sub 200
High Frequency
Subwoofer Speakers
Cambridge Audio MSX Sub 200
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 Cambridge Audio MSX Sub 200's and Polk Monitor XT12's external dimensions. Cambridge Audio MSX Sub 200 has external dimensions of 217.5 x 209.6 x 257.2mm () whereas Polk Monitor XT12 has external dimensions of 418.0 x 408.0 x 485.0mm (16-7/16inch x 16-1/16inch x 19-1/16inch).
Polk Monitor XT12 is clearly the larger of the two speakers. Its body is 198.4mm wider, 200.5mm taller and 227.8mm deeper than Cambridge Audio MSX Sub 200.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Polk Monitor XT12 needs about 267% more floor or shelf area. Polk Monitor XT12 is 228mm deeper, so it stands that much further out from the wall. Polk Monitor XT12 is 201mm taller.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the Cambridge Audio MSX Sub 200 is approximately 539.1cm2 / 83.6inch2 and base area of the Polk Monitor XT12 is approximately 1978.8cm2 / 306.7inch2. The MSX Sub 200 requires 73% less surface area than the Monitor XT12 which gives it a small advantage on placement in tight spaces.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The Cambridge Audio MSX Sub 200 weighs 4.99kg / 11lbs and the Polk Monitor XT12 weighs 17.73kg / 39lbs. This makes the Monitor XT12 255% heavier than the MSX Sub 200.
Here is a comparison of how MSX Sub 200 and Monitor XT12's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
Cambridge Audio MSX Sub 200
 High Frequency Response |
200 Hz
vs
160 Hz
|
Generates higher frequency |
 Height |
217mm
vs
418mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
539cm2
vs
1978cm2
|
Takes less floor space |
 Woofer Size |
12 inches
vs
6.5 inches
|
Larger woofer |
| Low Frequency Response |
24 Hz
vs
36 Hz
|
Generates deeper bass |
 Price per pair* |
399USD
vs
449USD
|
costs less (*prices may change depending on the seller, location and time) |
Size, drawn to scale
Both subwoofers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same floor and pushed back to the same wall, so the bigger one visibly takes more of the room.
Polk Monitor XT12 needs about 267% more floor area. Polk Monitor XT12 stands 228mm further into the room. Polk Monitor XT12 is 201mm taller.
| General |
Cambridge Audio MSX Sub 200 |
Polk Monitor XT12 |
| Brand |
Cambridge Audio |
Polk Audio |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
36-200 Hz |
24-160 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
50-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
12" |
| Woofer Composition |
|
Bi-laminate paper |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
217.5mm (8.6") |
418.0mm (16.5") |
| Width |
209.6mm (8.3") |
408.0mm (16.1") |
| Depth |
257.2mm (10.1") |
485.0mm (19.1") |
| Weight |
4.99kg (11lbs) |
17.73kg (39lbs) |
| Enclosure |
|
Bass Reflex |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
3 Years |
| Labor Warranty |
2 Years |
3 Years |
A passive radiator subwoofer against a ported one. That is the most consequential line on this page: it decides how the bass rolls off, how it behaves in a small room, and how much output you get for the size of the box.
| Area | Better | Why |
|---|
| Bass depth | B | Polk Monitor XT12 goes deeper - 24Hz against 36Hz. That gap covers the lowest notes of a five-string bass and a concert bass drum. |
| Amplifier power | A | Cambridge Audio MSX Sub 200 has the bigger amplifier - 200W against 50W RMS, about 6dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | B | Polk Monitor XT12 moves more air: 12" against 6.5" is 3.41x the cone area, not the 1.85x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | depends | Cambridge Audio MSX Sub 200 is passive radiator - a passive radiator behaves like a port without the pipe noise, and suits a slim cabinet; Polk Monitor XT12 is ported - a ported box gives more output low down for its size, at the cost of a steeper roll-off below tuning. Neither is better in the abstract; ported tends to suit films and sealed tends to suit music, and both generalisations have exceptions. |
| Cabinet size | depends | Cambridge Audio MSX Sub 200 is about 86% smaller by volume. In a subwoofer that is a real trade rather than a preference: box volume is how you get output low down without a bigger amplifier. |
| Warranty | B | Polk Monitor XT12 carries 3 years on parts against 2 years. A subwoofer amplifier works harder than anything else in the system, so this is not a throwaway line. |
| Price | B | Polk Monitor XT12 costs less - $399 against $449, about 11% less. |
A Cambridge Audio MSX Sub 200 B Polk Monitor XT12
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 subwoofers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Polk Monitor XT12 is the easier recommendation: it leads on most of the measured areas and costs less. Take Cambridge Audio MSX Sub 200 if one of the "depends" rows describes your room. If placement is the constraint - a corner, behind a sofa, under a desk - Cambridge Audio MSX Sub 200 is the one that will actually go there, and a well-placed small subwoofer beats a badly-placed big one every time.
One thing outweighs everything above: where the subwoofer stands. Room modes can add or remove 10dB or more at a given seat, which is far larger than any difference on this page. Before spending more, try the sub in two or three positions - the crawl test, where you put it in the listening seat and crawl the room to find where the bass sounds best, costs nothing and usually beats an upgrade.