Short answer: the RSL (Rogersound Labs) Speedwoofer 12S. It ranks #131 of 143 subwoofers by sound quality (rated 3.7/5) at $884.96 and is still sold new; the BK Electronics Monolith-DF ranks #141 (rated 3.3/5) and is discontinued, so it is only an option used.
The RSL (Rogersound Labs) Speedwoofer 12S is the better-sounding choice. An affordable rear ported 12 inch subwoofer with strong deep bass output for movies. The tradeoff: The 565.1H x 479.4W x 562.0D mm cabinet and 82 lbs (37.2 kg) mass make this a serious placement and moving commitment.
The case for the BK Electronics Monolith-DF: A down ported 12 inch subwoofer with balanced XLR and RCA inputs at a low price, now discontinued. The tradeoff: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority.
Buy the RSL (Rogersound Labs) Speedwoofer 12S. It is rated higher for sound quality; the BK Electronics Monolith-DF is no longer sold new.
Looking for alternatives? See the complete Subwoofers rankings.
An affordable rear ported 12 inch subwoofer with strong deep bass output for movies.
A down ported 12 inch subwoofer with balanced XLR and RCA inputs at a low price, now discontinued.
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Specifications Side By Side
| RSL (Rogersound Labs) Speedwoofer 12S | BK Electronics Monolith-DF | |
|---|---|---|
| Price | $884.96 | £406.95 Discontinued |
| Ranked | #131 of 143 in Large Home Subwoofers (Over 75 lbs) | #141 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, rear | ported, bottom |
| Output SPL at 15 Hz | 104.4 dB | 91.3 dB |
| Output SPL at 20 Hz | 109.3 dB | 102.0 dB |
| Output SPL at 25 Hz | 110.9 dB | 106.4 dB |
| Output SPL at 31.5 Hz | 112.5 dB | 108.3 dB |
| Output SPL at 40 Hz | 113.4 dB | 108.6 dB |
| Output SPL at 50 Hz | 113.4 dB | 108.7 dB |
| Output SPL at 63 Hz | 113.0 dB | 108.6 dB |
| Output SPL at 80 Hz | 113.1 dB | 107.7 dB |
| Output SPL at 100 Hz | 112.2 dB | - |
| CEA-2010-A Average (40-80Hz) | 113.2 dB | 108.4 dB |
| Dimensions | 22.2”H x 18.9”W x 22.1”D (565.1 x 479.4 x 562.0 mm) | 23.8”H x 21.3”W x 16.5”D (603.8 x 539.8 x 419.9 mm) |
| Weight | 82 lbs (37.2 kg) | 103.2 lbs (46.8 kg) |
| Cabinet Color | black, white | black, wood |
| Country | United States | United Kingdom |
| Measurement Source | ErinsAudioCorner | Ilkka Rissanen |
| Drivers | 12” (305mm) driver | 12” (305mm) driver with ported design |
| Warranty | 5/3 | 2 |
| Inputs | - | XLR (balanced), RCA (unbalanced) |
| 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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