Short answer: the Rythmik FV25HP for better sound quality, the SVS PB-4000 for the lower price. The Rythmik FV25HP ranks #22 of 110 subwoofers at $2499. The SVS PB-4000 ranks #62 at $2158.97, $340.03 cheaper.
What the Rythmik FV25HP offers: Independent CEA-2010 testing records 116.6 dB at 20 Hz and 126.2 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room. Watch for: The 1054.1H x 533.4W x 558.8D mm cabinet and 95.3 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
What the SVS PB-4000 offers: Independent CEA-2010 testing records 115.3 dB at 20 Hz and 120.3 dB through 40-80 Hz. The ported, front enclosure with 13.5” (343mm) driver with ported design has the headroom for demanding film bass in a large room. Watch for: The 594.4H x 520.7W x 703.6D mm cabinet and 69.5 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 FV25HP if sound quality matters more than the price. Buy the SVS PB-4000 if the price matters more than sound quality.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Rythmik FV25HP | SVS PB-4000 | |
|---|---|---|
| Price | $2499 | $2,158.97 |
| Ranked | #22 of 110 in Large Home Subwoofers (Over 75 lbs) | #62 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 10 Hz | 99.7 dB | - |
| Output SPL at 12.5 Hz | 108.4 dB | - |
| Output SPL at 15 Hz | 113.2 dB | 102.1 dB |
| Output SPL at 20 Hz | 116.6 dB | 115.3 dB |
| Output SPL at 25 Hz | 119.1 dB | 116.3 dB |
| Output SPL at 31.5 Hz | 122.4 dB | 117.8 dB |
| Output SPL at 40 Hz | 124.7 dB | 119.8 dB |
| Output SPL at 50 Hz | 126.1 dB | 121.7 dB |
| Output SPL at 63 Hz | 126.7 dB | 120.7 dB |
| Output SPL at 80 Hz | 127.3 dB | 119.2 dB |
| Output SPL at 100 Hz | 127.9 dB | 118.1 dB |
| Output SPL at 125 Hz | 127.8 dB | 117.5 dB |
| CEA-2010-A Average (40-80Hz) | 126.2 dB | 120.3 dB |
| Dimensions | 41.5"H x 21"W x 22"D (1054.1 x 533.4 x 558.8 mm) | 23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm) |
| Weight | 210.1 lbs (95.3 kg) | 153.2 lbs (69.5 kg) |
| Warranty | 5/3 | 5 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Data-bass | Audioholics |
| Drivers | 2x 15" (381mm) driver | 13.5" (343mm) driver with ported design |
Related Speaker Comparisons
How Rythmik FV25HP compares with other leading options:
- Rythmik FV25HP vs Funk Audio Ultra 24.0
- Rythmik FV25HP vs JTR Speakers Growler (2015)
- Rythmik FV25HP vs Harbinger V2218S
- Rythmik FV25HP vs Funk Audio Classic 18.0
- Monoprice Monolith 16 THX Ultra vs Rythmik FV25HP
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 FV25HP: $2499 eBay
Pros: Independent CEA-2010 testing records 116.6 dB at 20 Hz and 126.2 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room.
Cons: The 1054.1H x 533.4W x 558.8D mm cabinet and 95.3 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 Rythmik FV25HP review and specifications →
| CEA-2010-A Average (40-80Hz) | 126.2 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 41.5"H x 21"W x 22"D (1054.1 x 533.4 x 558.8 mm) |
| Drivers | 2x 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 99.7 dB |
| Output SPL at 12.5 Hz | 108.4 dB |
| Output SPL at 15 Hz | 113.2 dB |
| Output SPL at 20 Hz | 116.6 dB |
| Output SPL at 25 Hz | 119.1 dB |
| Output SPL at 31.5 Hz | 122.4 dB |
| Output SPL at 40 Hz | 124.7 dB |
| Output SPL at 50 Hz | 126.1 dB |
| Output SPL at 63 Hz | 126.7 dB |
| Output SPL at 80 Hz | 127.3 dB |
| Output SPL at 100 Hz | 127.9 dB |
| Output SPL at 125 Hz | 127.8 dB |
| Warranty | 5/3 |
| Weight | 210.1 lbs (95.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Rythmik FV25HP vs Monoprice Monolith M-215
- Rythmik FV25HP vs Monoprice Monolith 16 THX Ultra
- Rythmik FV25HP vs JTR Speakers Captivator 1400
- Rythmik FV25HP vs Funk Audio Classic 18.0
- Rythmik FV25HP vs Harbinger V2218S
- Rythmik FV25HP vs JTR Speakers Growler (2015)
- Rythmik FV25HP vs Funk Audio Ultra 24.0
- Rythmik FV25HP vs Rythmik FV15HP
- See all 13 comparisons
SVS PB-4000: $2,158.97 Amazon eBay
Pros: Independent CEA-2010 testing records 115.3 dB at 20 Hz and 120.3 dB through 40-80 Hz. The ported, front enclosure with 13.5” (343mm) driver with ported design has the headroom for demanding film bass in a large room.
Cons: The 594.4H x 520.7W x 703.6D mm cabinet and 69.5 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 PB-4000 review and specifications →
| CEA-2010-A Average (40-80Hz) | 120.3 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm) |
| Drivers | 13.5" (343mm) driver with ported design |
| Enclosure | ported, front |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 102.1 dB |
| Output SPL at 20 Hz | 115.3 dB |
| Output SPL at 25 Hz | 116.3 dB |
| Output SPL at 31.5 Hz | 117.8 dB |
| Output SPL at 40 Hz | 119.8 dB |
| Output SPL at 50 Hz | 121.7 dB |
| Output SPL at 63 Hz | 120.7 dB |
| Output SPL at 80 Hz | 119.2 dB |
| Output SPL at 100 Hz | 118.1 dB |
| Output SPL at 125 Hz | 117.5 dB |
| Warranty | 5 |
| Weight | 153.2 lbs (69.5 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
- SVS PB-4000 vs SVS SB-4000
- SVS PB-4000 vs Monoprice Monolith M-15 V2
- SVS PB-4000 vs Rythmik F18
- SVS PB-4000 vs HSU Research VTF-3 MK5 HP
- SVS PB-4000 vs Monoprice Monolith M15-S
- SVS PB-4000 vs HSU Research VTF-15H MK2
- SVS PB-4000 vs Rythmik FV15HP
- SVS PB-4000 vs JTR Speakers Captivator 1400
- See all 24 comparisons