Short answer: the Dynamo 1600X for output headroom, the RSL Speedwoofer 10S MKII for a compact ported design. The sealed 15-inch Dynamo’s 900W RMS and 1800W peak produce forceful, clean, tight low bass, but it costs $1,606.77 and its 121.5 dB mid-range output is a limitation. The 10-inch ported RSL runs 400W RMS and 1020W peak through its XDR amplifier.
Buy the RSL (Rogersound Labs) Speedwoofer 10S MKII new; the MartinLogan Dynamo 1600X is no longer sold new, so it only makes sense as a used find.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $1,606.77 Discontinued | $499 |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #124 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 15 Hz | 86.2 dB | 89.0 dB |
| Output SPL at 20 Hz | 99.4 dB | 100.0 dB |
| Output SPL at 25 Hz | 103.9 dB | 105.0 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 107.7 dB |
| Output SPL at 40 Hz | 118.4 dB | 110.3 dB |
| Output SPL at 50 Hz | 121.0 dB | 112.9 dB |
| Output SPL at 63 Hz | 121.8 dB | 113.0 dB |
| Output SPL at 80 Hz | 121.0 dB | 112.1 dB |
| Output SPL at 100 Hz | 120.2 dB | 111.4 dB |
| Output SPL at 125 Hz | 119.0 dB | 110.7 dB |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 112.1 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 15.5”H x 15”W x 15.7”D (393.7 x 381.0 x 400.0 mm) |
| Weight | 56 lbs (25.4 kg) | 40.6 lbs (18.4 kg) |
| Warranty | 3 | 5/2 |
| Cabinet Color | black | black, white |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±3dB | 21-200Hz |
| Amplifier Power | 900W RMS / 1800W peak | 400W RMS |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | - |
| Drivers | 15” (381mm) driver | 10” (254mm) driver |
| XLR Input | Yes | - |
| RCA Input | Yes | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
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