Depth 215 is a Sealed type Powered Subwoofer by MartinLogan with a frequency range of 18-120 Hz. It was released in October 2025. It features 2 x 15" Aluminium Woofer, and powered by a Class D 2200 watts amplifier.
A sealed subwoofer with 2 x 15 inch woofers on a 2200 W RMS (4400 W peak) Class D amplifier, 18 Hz to 120 Hz. Anthem Room Correction is built in. Depth subwoofers run opposed woofers in MartinLogan's BalancedForce arrangement, so the cabinet's reaction forces cancel instead of shaking the floor.
Depth 215 is a member of MartinLogan's Depth series of Powered subwoofers. Below you can see the main specs of these subwoofers as well as review and comparison links.
MartinLogan Depth Series Subwoofers
Frequency Response
Where should the crossover go? → · What will your room do to this bass? →
MartinLogan Depth 215 has a Frequency response range of 18-120 Hz. Thanks to its 2 x 15-inch driver and 2200 watts RMS (4400 watts MAX) amplifier, at 18Hz the Depth 215 can generate bass levels that is even below 20Hz which is considered to be the bottom limit of Full Range sound (20Hz -20kHz) that human can hear.
Here we have a comparison of how Depth 215's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Powered Subwoofers
High Frequency
Subwoofer Speakers
Among all subwoofers in our database with a max MSRP price of 10000$, these are the 5 Powered Subwoofer models that can reach deeper bass levels than the MartinLogan Depth 215's 18Hz:
Inputs and Outputs
- PreampLevel Inputs: Stereo RCA line, LFE, XLR, speaker level
- SpeakerLevel Inputs: Yes
MartinLogan Depth 215 External Dimensions and Weight
MartinLogan Depth 215 has external dimensions of (Height x Width x Depth) 22-1/2 x 22-13/16 x 23-7/16inch (572.0 x 580.0 x 595.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of MartinLogan Depth 215 is approximately 3451.0cm2 / 534.9inch2.
Find speakers that fit your shelf or alcove →
WeightThe MartinLogan Depth 215 weighs 78.50kg / 172.7lbs. Weight of a subwoofer is an important factor when you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. Here is a comparison of how Depth 215's weight compares with the average, max and min weights in its class.
Weight
All Subwoofer Speakers
Weight
Subwoofer Speakers under $10000
Cabinet type and Materials
MartinLogan Depth 215 has a
Acoustic Suspension type cabinet. Acoustic suspension aka Sealed subwoofers are preferred for music oriented systems whereas the Ported subwoofers are generally accepted to be more suitable for home theatre systems.
Does the MartinLogan Depth 215 come with a Grille?
Depth 215 comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.
Recommended Accessories
Here is a list of accessories that we think you may need for the MartinLogan Depth 215.
Official Product Page
Official manufacturer's product page for the MartinLogan Depth 215 speaker can be found below:
Official Product Page for MartinLogan Depth 215
| General |
| Brand | MartinLogan |
| Full Model Name | MartinLogan Depth 215 |
| Type | Powered Subwoofer |
| Release Date | October 2025 |
| Frequency Response | 18-120 Hz |
| Enclosure Type | Sealed |
| Enclosure | Acoustic Suspension |
| Firing Direction | Front |
Amplifier & Driver |
| Power (RMS) | 2200 watts |
| Power (Peak) | 4400 watts |
| Amplifier Type | Class D |
| Woofer | 2 x 15-inch Aluminium |
| Controls & Connections |
| Phase Control | Yes |
| Line-level Inputs | Stereo RCA line, LFE, XLR, speaker level |
| Speaker-level Inputs | Yes |
Physical |
| Dimensions (HxWxD) | 22-1/2" x 22-13/16" x 23-7/16" (572.0 x 580.0 x 595.0mm) |
| Weight | 78.5 kg (173.1 lbs) |
| Grille | Yes |