Short answer: the Rythmik FV15HP on measured sound quality, the RSL (Rogersound Labs) Speedwoofer 12S on price. The Rythmik FV15HP ranks #48 of 110 subwoofers at $2127. The RSL (Rogersound Labs) Speedwoofer 12S ranks #98 at $800, $1327 cheaper.
What the Rythmik FV15HP offers: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more. Watch for: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.
What the RSL (Rogersound Labs) Speedwoofer 12S offers: Independent CEA-2010 testing records 109.3 dB at 20 Hz and 113.2 dB through 40-80 Hz. The ported, rear enclosure with 12” (305mm) driver has the headroom for demanding film bass in a large room. Watch for: The 565.1H x 479.4W x 562.0D mm cabinet and 37.2 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
Buy the Rythmik FV15HP if sound quality is the priority over the price, or the RSL (Rogersound Labs) Speedwoofer 12S if the price is the priority over sound quality.
If sound quality matters at all to you, skip the RSL (Rogersound Labs) Speedwoofer 12S. It ranks near the bottom of the 110 subwoofers, so look higher up the list instead.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| Rythmik FV15HP | RSL (Rogersound Labs) Speedwoofer 12S | |
|---|---|---|
| Price | $1,770 | $800 |
| Ranked | #48 of 110 in Large Home Subwoofers (Over 75 lbs) | #98 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, rear |
| Output SPL at 12.5 Hz | 92.8 dB | - |
| Output SPL at 15 Hz | 105.1 dB | 104.4 dB |
| Output SPL at 20 Hz | 111.1 dB | 109.3 dB |
| Output SPL at 25 Hz | 116.1 dB | 110.9 dB |
| Output SPL at 31.5 Hz | 120.0 dB | 112.5 dB |
| Output SPL at 40 Hz | 122.5 dB | 113.4 dB |
| Output SPL at 50 Hz | 122.1 dB | 113.4 dB |
| Output SPL at 63 Hz | 121.8 dB | 113.0 dB |
| Output SPL at 80 Hz | 121.4 dB | 113.1 dB |
| Output SPL at 100 Hz | 121.2 dB | 112.2 dB |
| Output SPL at 125 Hz | 121.1 dB | - |
| CEA-2010-A Average (40-80Hz) | 122.0 dB | 113.2 dB |
| Dimensions | 24.5"H x 18.2"W x 24.2"D (622.3 x 463.5 x 615.9 mm) | 22.2"H x 18.9"W x 22.1"D (565.1 x 479.4 x 562.0 mm) |
| Weight | 115.1 lbs (52.2 kg) | 82 lbs (37.2 kg) |
| Warranty | 5/3 | ? |
| Cabinet Color | black, white | black, white |
| Country | United States | United States |
| Measurement Source | Audioholics | ErinsAudioCorner |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
Related Speaker Comparisons
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- Power Sound Audio (PSA) TRIAX vs Rythmik FV15HP
- JTR Speakers Captivator 4000ULF vs Rythmik FV15HP
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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 FV15HP: $1,770 Rythmik Audio eBay
Pros: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more.
Cons: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.
Full Rythmik FV15HP review and specifications →
| CEA-2010-A Average (40-80Hz) | 122.0 dB |
|---|---|
| Cabinet Color | black, white |
| Country | United States |
| Dimensions | 24.5"H x 18.2"W x 24.2"D (622.3 x 463.5 x 615.9 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Audioholics |
| Output SPL at 12.5 Hz | 92.8 dB |
| Output SPL at 15 Hz | 105.1 dB |
| Output SPL at 20 Hz | 111.1 dB |
| Output SPL at 25 Hz | 116.1 dB |
| Output SPL at 31.5 Hz | 120.0 dB |
| Output SPL at 40 Hz | 122.5 dB |
| Output SPL at 50 Hz | 122.1 dB |
| Output SPL at 63 Hz | 121.8 dB |
| Output SPL at 80 Hz | 121.4 dB |
| Output SPL at 100 Hz | 121.2 dB |
| Output SPL at 125 Hz | 121.1 dB |
| Warranty | 5/3 |
| Weight | 115.1 lbs (52.2 kg) |
- 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
- Rythmik FV15HP vs JTR Speakers Captivator RS1
- Rythmik FV15HP vs HSU Research VTF-15H MK2
- Rythmik FV15HP vs HSU Research VTF-3 MK5 HP
- Rythmik FV15HP vs SVS PB-4000
- Rythmik FV15HP vs Monoprice Monolith M-15 V2
- Rythmik FV15HP vs JTR Speakers Captivator 1400
- Rythmik FV15HP vs Rythmik F18
- Rythmik FV15HP vs Monoprice Monolith M15-S
- See all 24 comparisons
RSL (Rogersound Labs) Speedwoofer 12S: $800 eBay
Pros: Independent CEA-2010 testing records 109.3 dB at 20 Hz and 113.2 dB through 40-80 Hz. The ported, rear enclosure with 12” (305mm) driver has the headroom for demanding film bass in a large room.
Cons: The 565.1H x 479.4W x 562.0D mm cabinet and 37.2 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 RSL (Rogersound Labs) Speedwoofer 12S review and specifications →
| CEA-2010-A Average (40-80Hz) | 113.2 dB |
|---|---|
| Cabinet Color | black, white |
| Country | United States |
| Dimensions | 22.2"H x 18.9"W x 22.1"D (565.1 x 479.4 x 562.0 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, rear |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 15 Hz | 104.4 dB |
| Output SPL at 20 Hz | 109.3 dB |
| Output SPL at 25 Hz | 110.9 dB |
| Output SPL at 31.5 Hz | 112.5 dB |
| Output SPL at 40 Hz | 113.4 dB |
| Output SPL at 50 Hz | 113.4 dB |
| Output SPL at 63 Hz | 113.0 dB |
| Output SPL at 80 Hz | 113.1 dB |
| Output SPL at 100 Hz | 112.2 dB |
| Warranty | ? |
| Weight | 82 lbs (37.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- RSL (Rogersound Labs) Speedwoofer 12S vs HSU Research VTF-3 MK3
- RSL (Rogersound Labs) Speedwoofer 12S vs BK Electronics Monolith-DF
- RSL (Rogersound Labs) Speedwoofer 12S vs SVS SB13-Plus
- RSL (Rogersound Labs) Speedwoofer 12S vs Rythmik F18
- RSL (Rogersound Labs) Speedwoofer 12S vs SVS PB-4000
- RSL (Rogersound Labs) Speedwoofer 12S vs JTR Speakers Captivator 1400
- RSL (Rogersound Labs) Speedwoofer 12S vs Monoprice Monolith M-215
- RSL (Rogersound Labs) Speedwoofer 12S vs Rythmik FV25HP
- See all 13 comparisons