In this review, we will be comparing BalancedForce 210 and Monitor XT12, two Powered Subwoofer speakers from MartinLogan 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 MartinLogan BalancedForce 210 and Polk Monitor XT12 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the MartinLogan BalancedForce 210 and Polk Monitor XT12 compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.MartinLogan BalancedForce 210 and Polk Monitor XT12 have a totally different setup: the MartinLogan BalancedForce 210 features 2 x 10-inch drivers whereas the Monitor XT12 features 1 x 12-inch drivers.
Frequency Response
BalancedForce 210 has a frequency range of 20-120 Hz whereas Monitor XT12 has a frequency range of 24-160 Hz. With a minimum frequency of 20Hz, the BalancedForce 210 can go slightly deeper then the Monitor XT12's min frequency of 24Hz.
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
MartinLogan BalancedForce 210
High Frequency
Subwoofer Speakers
MartinLogan BalancedForce 210
Cabinet Type
The MartinLogan BalancedForce 210 has a Acoustic Suspension type cabinet. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs. On the other hand the Polk Monitor XT12 have Bass Reflex type enclosure. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
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 MartinLogan BalancedForce 210's and Polk Monitor XT12's external dimensions. MartinLogan BalancedForce 210 has external dimensions of 485.0 x 486.0 x 543.0mm ( 19-1/16inch x 19-1/8inch x 21-3/8inch ) 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 ) .
MartinLogan BalancedForce 210 is clearly the larger of the two speakers. Its body is 78mm wider, 67mm taller and 58mm deeper than Polk Monitor XT12.
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 MartinLogan BalancedForce 210 is approximately 2639.0cm2 / 409.0inch2 and base area of the Polk Monitor XT12 is approximately 1978.8cm2 / 306.7inch2. The BalancedForce 210 requires 33% more surface area than the Monitor XT12 which gives it a small disadvantage 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 MartinLogan BalancedForce 210 weighs 43.64kg / 96lbs and the Polk Monitor XT12 weighs 17.73kg / 39lbs. This makes the BalancedForce 210 146% heavier than the Monitor XT12.
Here is a comparison of how BalancedForce 210 and Monitor XT12's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
MartinLogan BalancedForce 210
What's in the Box of MartinLogan BalancedForce 210?
Here are the items that are included inside the box of BalancedForce 210:
Powered subwooferTop-glass cover2 Grilles8-feet AC power cord4 Spike feet4 CollarsUSB thumbdriveUser-feets ManualOnline Registration Card
What's in the Box of Polk Monitor XT12?
Here are the items that come with the Monitor XT12:
Black powered subwoofer6.5-feet AC power cordGrilleOwners ManualOnline registration card
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
20 Hz
vs
24 Hz
|
Generates deeper bass |
 Driver Setup |
1-way
vs
-way
|
Have a dedicated mid-range driver |
| Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
 High Frequency Response |
160k Hz
vs
120k Hz
|
Generates higher frequency |
 Height |
418mm
vs
485mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1978cm2 (408x485mm)
vs
2639cm2 (486x543mm)
|
Takes less floor space |
 Price per pair* |
399USD
vs
3499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
MartinLogan BalancedForce 210 |
Polk Monitor XT12 |
| Brand |
MartinLogan |
Polk Audio |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
850 watts |
50 watts |
| Frequency Response |
20-120 Hz |
24-160 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
850-watt RMS |
50-watt RMS |
| Watts Peak (Max) |
1700-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
10" |
12" |
| Woofer Composition |
Aluminum |
Bi-laminate paper |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
485.0mm (19.1") |
418.0mm (16.5") |
| Width |
486.0mm (19.1") |
408.0mm (16.1") |
| Depth |
543.0mm (21.4") |
485.0mm (19.1") |
| Weight |
43.64kg (96lbs) |
17.73kg (39lbs) |
| Enclosure |
Acoustic Suspension |
Bass Reflex |
| Available Colors |
Gloss Black, Black Ash |
n/a |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years w/ Registration |
3 Years |
| Labor Warranty |
3 Years w/ Registration |
3 Years |