Short answer: the JTR Speakers Captivator S2 if sound quality matters most, the HSU Research VTF-3 MK3 if price matters most. The JTR Speakers Captivator S2 ranks #9 of 110 subwoofers at $3995. The HSU Research VTF-3 MK3 ranks #97 at $1499, $2496 cheaper.
What the JTR Speakers Captivator S2 offers: Independent CEA-2010 testing records 115.1 dB at 20 Hz and 129.4 dB through 40-80 Hz. The sealed enclosure with 2x 18” (457mm) drivers has the headroom for demanding film bass in a large room. Watch for: The 1016.0H x 533.4W x 457.2D mm cabinet and 99.8 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.
What the HSU Research VTF-3 MK3 offers: Independent CEA-2010 testing records 104.3 dB at 20 Hz and 113.5 dB through 40-80 Hz. The ported, rear enclosure with 12” (305mm) driver delivers substantial upper-bass output for movie effects and music. Watch for: 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. The 546.1H x 431.8W x 635.0D mm cabinet and 40.8 kg mass still require deliberate placement and calibration.
Buy the JTR Speakers Captivator S2 if sound quality matters more than the price. Buy the HSU Research VTF-3 MK3 if the price matters more than sound quality.
The HSU Research VTF-3 MK3 is not a sound-quality pick. It sits near the bottom of the 110 subwoofers; there are better options higher up.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| JTR Speakers Captivator S2 | HSU Research VTF-3 MK3 | |
|---|---|---|
| Price | $3995 | $1499 |
| Ranked | #9 of 110 in Large Home Subwoofers (Over 75 lbs) | #97 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 10 Hz | 100.3 dB | - |
| Output SPL at 12.5 Hz | 103.3 dB | - |
| Output SPL at 15 Hz | 108.7 dB | 88.5 dB |
| Output SPL at 20 Hz | 115.1 dB | 104.3 dB |
| Output SPL at 25 Hz | 119.7 dB | 108.7 dB |
| Output SPL at 31.5 Hz | 124.8 dB | 109.7 dB |
| Output SPL at 40 Hz | 129.3 dB | 112.1 dB |
| Output SPL at 50 Hz | 130.3 dB | 113.7 dB |
| Output SPL at 63 Hz | 129.4 dB | 114.0 dB |
| Output SPL at 80 Hz | 128.5 dB | 114.0 dB |
| Output SPL at 100 Hz | 128.1 dB | - |
| Output SPL at 125 Hz | 128.0 dB | - |
| CEA-2010-A Average (40-80Hz) | 129.4 dB | 113.5 dB |
| Dimensions | 40"H x 21"W x 18"D (1016.0 x 533.4 x 457.2 mm) | 21.5"H x 17"W x 25"D (546.1 x 431.8 x 635.0 mm) |
| Weight | 220 lbs (99.8 kg) | 89.9 lbs (40.8 kg) |
| Warranty | 5/3 | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Ilkka Rissanen |
| Drivers | 2x 18" (457mm) drivers | 12" (305mm) driver |
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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
JTR Speakers Captivator S2: $3995 eBay
Pros: Independent CEA-2010 testing records 115.1 dB at 20 Hz and 129.4 dB through 40-80 Hz. The sealed enclosure with 2x 18” (457mm) drivers has the headroom for demanding film bass in a large room.
Cons: The 1016.0H x 533.4W x 457.2D mm cabinet and 99.8 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.
Notes: Replaced by “RS2”
Full JTR Speakers Captivator S2 review and specifications →
| CEA-2010-A Average (40-80Hz) | 129.4 dB |
|---|---|
| Country | United States |
| Dimensions | 40"H x 21"W x 18"D (1016.0 x 533.4 x 457.2 mm) |
| Drivers | 2x 18" (457mm) drivers |
| Enclosure | sealed |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 100.3 dB |
| Output SPL at 12.5 Hz | 103.3 dB |
| Output SPL at 15 Hz | 108.7 dB |
| Output SPL at 20 Hz | 115.1 dB |
| Output SPL at 25 Hz | 119.7 dB |
| Output SPL at 31.5 Hz | 124.8 dB |
| Output SPL at 40 Hz | 129.3 dB |
| Output SPL at 50 Hz | 130.3 dB |
| Output SPL at 63 Hz | 129.4 dB |
| Output SPL at 80 Hz | 128.5 dB |
| Output SPL at 100 Hz | 128.1 dB |
| Output SPL at 125 Hz | 128.0 dB |
| Warranty | 5/3 |
| Weight | 220 lbs (99.8 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
- JTR Speakers Captivator S2 vs Power Sound Audio (PSA) T18
- JTR Speakers Captivator S2 vs Power Sound Audio (PSA) V3600I
- JTR Speakers Captivator S2 vs Funk Audio Ultra 24.0
- JTR Speakers Captivator S2 vs JTR Speakers Captivator 215PRO
- JTR Speakers Captivator S2 vs JTR Speakers Captivator 4000ULF
- JTR Speakers Captivator S2 vs Funk Audio Custom 21.0
- JTR Speakers Captivator S2 vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator S2 vs JTR Speakers Growler (2015)
- See all 48 comparisons
HSU Research VTF-3 MK3: $1499 eBay
Pros: Independent CEA-2010 testing records 104.3 dB at 20 Hz and 113.5 dB through 40-80 Hz. The ported, rear enclosure with 12” (305mm) driver delivers substantial upper-bass output for movie effects and music.
Cons: 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. The 546.1H x 431.8W x 635.0D mm cabinet and 40.8 kg mass still require deliberate placement and calibration.
Full HSU Research VTF-3 MK3 review and specifications →
| CEA-2010-A Average (40-80Hz) | 113.5 dB |
|---|---|
| Country | United States |
| Dimensions | 21.5"H x 17"W x 25"D (546.1 x 431.8 x 635.0 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Ilkka Rissanen |
| Output SPL at 15 Hz | 88.5 dB |
| Output SPL at 20 Hz | 104.3 dB |
| Output SPL at 25 Hz | 108.7 dB |
| Output SPL at 31.5 Hz | 109.7 dB |
| Output SPL at 40 Hz | 112.1 dB |
| Output SPL at 50 Hz | 113.7 dB |
| Output SPL at 63 Hz | 114.0 dB |
| Output SPL at 80 Hz | 114.0 dB |
| Weight | 89.9 lbs (40.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Ilkka Rissanen; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- HSU Research VTF-3 MK3 vs RSL (Rogersound Labs) Speedwoofer 12S
- HSU Research VTF-3 MK3 vs Monoprice Monolith 12 THX Ultra
- HSU Research VTF-3 MK3 vs HSU Research VTF-3 MK3 with Turbocharger
- HSU Research VTF-3 MK3 vs BK Electronics Monolith-DF
- HSU Research VTF-3 MK3 vs SVS SB13-Plus
- HSU Research VTF-3 MK3 vs Rythmik F18
- HSU Research VTF-3 MK3 vs SVS PB-4000
- HSU Research VTF-3 MK3 vs HSU Research VTF-3 MK5 HP
- See all 17 comparisons