In this review, we will be comparing Depth 215 and Depth 212, two Powered Subwoofer speakers by MartinLogan. 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 Depth 215 and MartinLogan Depth 212 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 Depth 215 and MartinLogan Depth 212 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.Both MartinLogan Depth 215and MartinLogan Depth 212 have a double woofer setup however the MartinLogan Depth 215's woofer is 15-inch whereas the MartinLogan Depth 212 features a 12-inch woofer.
Frequency Response
Depth 215 and Depth 212 has exactly the same frequency range of 18-120 Hz.
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
High Frequency
Subwoofer Speakers
Cabinet Type
Both MartinLogan Depth 215 and MartinLogan Depth 212 have Acoustic Suspension type cabinets. 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.
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 Depth 215's and MartinLogan Depth 212's external dimensions. MartinLogan Depth 215 has external dimensions of 572.0 x 580.0 x 595.0mm ( 22-1/2 x 22-13/16 x 23-7/16inch) whereas MartinLogan Depth 212 has external dimensions of 533.0 x 503.0 x 518.0mm ( 21 x 19-13/16 x 20-3/8inch) .
MartinLogan Depth 215 is clearly the larger of the two speakers. Its body is 77mm wider, 39mm taller and 77mm deeper than MartinLogan Depth 212.
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 Depth 215 is approximately 3451.0cm2 / 534.9inch2 and base area of the MartinLogan Depth 212 is approximately 2605.5cm2 / 403.9inch2. The Depth 215 requires 32% more surface area than the Depth 212 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 Depth 215 weighs 78.50kg / 172.7lbs and the MartinLogan Depth 212 weighs 57.60kg / 126.7lbs. This makes the Depth 215 36% heavier than the Depth 212.
Here is a comparison of how Depth 215 and Depth 212's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
 Height |
533mm
vs
572mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
2605cm2
vs
3451cm2
|
Takes less floor space |
 Price per pair* |
5500USD
vs
7000USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
MartinLogan Depth 215 |
MartinLogan Depth 212 |
| Brand |
MartinLogan |
MartinLogan |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
2200 watts |
1100 watts |
| Frequency Response |
18-120 Hz |
18-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
2200-watt RMS |
1100-watt RMS |
| Watts Peak (Max) |
4400-watt RMS |
2200-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Aluminium |
Aluminium |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
35–120Hz |
35–120Hz |
Physical Specs |
|
|
| Height |
572.0mm (22.5") |
533.0mm (21") |
| Width |
580.0mm (22.8") |
503.0mm (19.8") |
| Depth |
595.0mm (23.4") |
518.0mm (20.4") |
| Weight |
78.50kg (172.7lbs) |
57.60kg (126.7lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
|
|
| Labor Warranty |
|
|