Short answer: the MartinLogan Depth 215. It ranks #39 of 139 subwoofers by sound quality, rated 4.3/5, at $6,999.99. The MartinLogan Depth 212 ranks #103, rated 4.1/5, at $5,499.99, $1,500 cheaper, which does not close the gap in sound quality.
The case for the MartinLogan Depth 215: The flagship of MartinLogan’s Depth series: two opposed 15” Carbon Aerocore woofers in a force-cancelling sealed cabinet with a 4400W peak amplifier, rated 18 to 120Hz (±3dB), with app control and Anthem Room Correction. The tradeoff: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from MartinLogan’s measured subs, the best of which, the single-15” Dynamo 1600X, reached 120.5dB in the 40 to 80Hz CEA-2010 bands.
Why pick the MartinLogan Depth 212: MartinLogan’s luxury subwoofer, with two opposed 12” Carbon Aerocore woofers in cast aluminum baskets that cancel cabinet vibration, a 2200W peak amplifier, and a finished rear panel so it looks good from any side. Watch for: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from MartinLogan’s measured subs, the best of which, the single-15” Dynamo 1600X, reached 120.5dB in the 40 to 80Hz CEA-2010 bands.
Buy the MartinLogan Depth 215. It is rated higher for sound quality, and the $1,500 you would save on the MartinLogan Depth 212 does not close the gap.
About the ratings: neither speaker has been measured yet, so both ratings are estimated from measured siblings and predecessors (likely ranges: MartinLogan Depth 215 3.9 to 4.5; MartinLogan Depth 212 3.7 to 4.4). Treat this verdict as provisional.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| MartinLogan Depth 215 | MartinLogan Depth 212 | |
|---|---|---|
| Price | $6,999.99 | $5,499.99 |
| Ranked | #39 of 139 in Large Home Subwoofers (Over 75 lbs) Estimated | #103 of 139 in Large Home Subwoofers (Over 75 lbs) Estimated |
| Enclosure | sealed | sealed |
| Drivers | 2 x 15” Carbon Aerocore woofers (opposed) | 2 x 12” Carbon Aerocore woofers (opposed) |
| Amplifier Power | 4400W peak | 2200W peak |
| Frequency Response | 18-120Hz ±3dB (manufacturer specified) | 18-120Hz ±3dB (manufacturer specified) |
| Dimensions | 22.5”H x 22.8”W x 23.4”D (572 x 580 x 595 mm) | 21”H x 19.8”W x 20.4”D (533 x 503 x 518 mm) |
| Weight | 173.1 lbs (78.5 kg) | 127 lbs (57.6 kg) |
| XLR Input | Yes | Yes |
| AES Input | No | No |
Related Speaker Comparisons
How MartinLogan Depth 215 compares with other leading options:
- Perlisten Audio D215s vs RTJ Audio 18Sub
- Monoprice Monolith 16 THX Ultra vs Perlisten Audio D215s
- Perlisten Audio D215s vs BK Electronics Extreme
- Perlisten Audio D215s vs RBH Sound Unrivaled 21-SF/R
- MartinLogan Grotto 15 vs MartinLogan Grotto 12
Prices on this page were last checked October 7, 2026 at 9:25 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
MartinLogan Depth 215: $6,999.99 Estimated MartinLogan eBay
Same family: the MartinLogan Depth 212 (smaller subwoofer, ranked lower, estimated 4.1/5).
Pros: The flagship of MartinLogan’s Depth series: two opposed 15” Carbon Aerocore woofers in a force-cancelling sealed cabinet with a 4400W peak amplifier, rated 18 to 120Hz (±3dB), with app control and Anthem Room Correction.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from MartinLogan’s measured subs, the best of which, the single-15” Dynamo 1600X, reached 120.5dB in the 40 to 80Hz CEA-2010 bands. Two opposed 15” drivers and 4400W peak should go beyond that. It weighs 78.5kg.
Full MartinLogan Depth 215 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 4400W peak |
| Dimensions | 22.5”H x 22.8”W x 23.4”D (572 x 580 x 595 mm) |
| Drivers | 2 x 15” Carbon Aerocore woofers (opposed) |
| Enclosure | sealed |
| Frequency Response | 18-120Hz ±3dB (manufacturer specified) |
| Weight | 173.1 lbs (78.5 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
MartinLogan Depth 212: $5,499.99 Estimated MartinLogan eBay
Same family: the MartinLogan Depth 215 (larger subwoofer, ranked higher, estimated 4.3/5).
Pros: MartinLogan’s luxury subwoofer, with two opposed 12” Carbon Aerocore woofers in cast aluminum baskets that cancel cabinet vibration, a 2200W peak amplifier, and a finished rear panel so it looks good from any side. Rated 18 to 120Hz (±3dB).
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from MartinLogan’s measured subs, the best of which, the single-15” Dynamo 1600X, reached 120.5dB in the 40 to 80Hz CEA-2010 bands. Two opposed 12” drivers in a sealed box should land close to it. It weighs 57.6kg.
Full MartinLogan Depth 212 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 2200W peak |
| Dimensions | 21”H x 19.8”W x 20.4”D (533 x 503 x 518 mm) |
| Drivers | 2 x 12” Carbon Aerocore woofers (opposed) |
| Enclosure | sealed |
| Frequency Response | 18-120Hz ±3dB (manufacturer specified) |
| Weight | 127 lbs (57.6 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.