Short answer: the Rythmik FVX12. It ranks #105 of 143 subwoofers by sound quality, rated 4.1/5, at $1,459. The SVS PB12-Plus ranks #112, rated 3.9/5, at $1,399.99, $59.01 cheaper, which does not close the gap in sound quality.
What the Rythmik FVX12 does well: A 12” Direct Servo subwoofer in a multi-tuned ported cabinet, so the port can be set for more output or plugged for a sealed-like roll-off, with one band of parametric EQ. The catch: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Rythmik LV12 (120.3dB in the 40 to 80Hz CEA-2010 bands and 107.7dB at 20Hz).
The case for the SVS PB12-Plus: Independent CEA-2010 testing records 110.0 dB at 20 Hz and 118.0 dB (avg of 3/4 bands) through 40-80 Hz. Watch for: The 558.8H x 502.9W x 675.6D mm cabinet and 127 lbs (57.6 kg) mass make this a serious placement and moving commitment.
Buy the Rythmik FVX12. It is rated higher for sound quality, and saving $59.01 with the SVS PB12-Plus does not make up for the sound-quality gap.
Worth knowing: the Rythmik FVX12 has not been measured yet. Its rating is estimated from related models, with a likely range of 3.8 to 4.3, so treat this verdict as provisional.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Rythmik FVX12 | SVS PB12-Plus | |
|---|---|---|
| Price | $1,459.00 | $1,399.99 |
| Ranked | #105 of 143 in Large Home Subwoofers (Over 75 lbs) Estimated | #112 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Country | United States | United States |
| Warranty | 5/3 | 5 |
| Enclosure | ported, front (multi-tuned) | ported, front |
| Drivers | 12” servo-controlled woofer | 12” (305mm) driver with ported design |
| Dimensions | 20.5”H x 17”W x 22”D (521 x 432 x 559 mm) | 22”H x 19.8”W x 26.6”D (558.8 x 502.9 x 675.6 mm) |
| Weight | 96.8 lbs (43.9 kg) | 127 lbs (57.6 kg) |
| Output SPL at 20 Hz | - | 110.0 dB |
| Output SPL at 25 Hz | - | 112.5 dB |
| Output SPL at 31.5 Hz | - | 114.5 dB |
| Output SPL at 40 Hz | - | 117.3 dB |
| Output SPL at 50 Hz | - | 118.3 dB |
| Output SPL at 63 Hz | - | 118.3 dB |
| CEA-2010-A Average (40-80Hz) | - | 118.0 dB (avg of 3/4 bands) |
| Measurement Source | - | Audioholics |
| Inputs | - | XLR (balanced), RCA (stereo) |
| 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 |
Related Speaker Comparisons
More worthwhile head-to-heads for Rythmik FVX12:
- Rythmik FVX12 vs Rythmik FVX15
- Rythmik FVX12 vs Klipsch Reference Premiere RP-1400SW
- Klipsch Reference Premiere RP-1400SW vs SVS PB12-Plus
- HSU Research VTF-3 MK5 HP vs SVS PB12-Plus
- SVS PB12-Plus vs REL Acoustics HT/1510 Predator II
Prices on this page were last checked October 11, 2026 at 4:59 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
Rythmik FVX12: $1,459.00 Estimated Rythmik Audio eBay
Same family: the Rythmik FVX15 (larger subwoofer, ranked higher, estimated 4.1/5).
Pros: A 12” Direct Servo subwoofer in a multi-tuned ported cabinet, so the port can be set for more output or plugged for a sealed-like roll-off, with one band of parametric EQ. Sold direct.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured Rythmik LV12 (120.3dB in the 40 to 80Hz CEA-2010 bands and 107.7dB at 20Hz). It weighs 43.9kg.
Full Rythmik FVX12 review and specifications →
| Released | May 2021 (5 years ago) |
|---|---|
| Country | United States |
| Dimensions | 20.5”H x 17”W x 22”D (521 x 432 x 559 mm) |
| Drivers | 12” servo-controlled woofer |
| Enclosure | ported, front (multi-tuned) |
| Warranty | 5/3 |
| Weight | 96.8 lbs (43.9 kg) |
- 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.
- Head-to-Head Comparisons
SVS PB12-Plus: $1,399.99 SVS eBay
Pros: Independent CEA-2010 testing records 110.0 dB at 20 Hz and 118.0 dB (avg of 3/4 bands) through 40-80 Hz. The ported, front enclosure with 12” (305mm) driver with ported design has the headroom for demanding film bass in a large room.
Cons: The 558.8H x 502.9W x 675.6D mm cabinet and 57.6 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
Full SVS PB12-Plus review and specifications →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 118.0 dB (avg of 3/4 bands) |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 22”H x 19.8”W x 26.6”D (558.8 x 502.9 x 675.6 mm) |
| Drivers | 12” (305mm) driver with ported design |
| Enclosure | ported, front |
| HDMI Input | No |
| Inputs | XLR (balanced), RCA (stereo) |
| Measurement Source | Audioholics |
| Optical Input | No |
| Output SPL at 20 Hz | 110.0 dB |
| Output SPL at 25 Hz | 112.5 dB |
| Output SPL at 31.5 Hz | 114.5 dB |
| Output SPL at 40 Hz | 117.3 dB |
| Output SPL at 50 Hz | 118.3 dB |
| Output SPL at 63 Hz | 118.3 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 127 lbs (57.6 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons