Short answer: the JTR Speakers Captivator S2. It ranks #9 of 110 subwoofers by sound quality at $3995; the Magico Audio ASUB ranks #104 and costs $6500, which makes this an easy call rather than a real tradeoff.

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 Magico Audio ASUB offers: Independent CEA-2010 testing records 94.3 dB at 20 Hz and 111.1 dB through 40-80 Hz. The sealed enclosure with 10” (254mm) 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 457.2H x 368.3W x 447.0D mm cabinet and 49.0 kg mass still require deliberate placement and calibration.
Buy the JTR Speakers Captivator S2. It ranks higher for sound quality than the Magico Audio ASUB and costs less, which settles it without a real tradeoff to make.
If sound quality matters at all to you, skip the Magico Audio ASUB. 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
| JTR Speakers Captivator S2 | Magico Audio ASUB | |
|---|---|---|
| Price | $3995 | $6,500 |
| Ranked | #9 of 110 in Large Home Subwoofers (Over 75 lbs) | #104 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | sealed |
| 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 | 94.3 dB |
| Output SPL at 25 Hz | 119.7 dB | 99.8 dB |
| Output SPL at 31.5 Hz | 124.8 dB | 105.8 dB |
| Output SPL at 40 Hz | 129.3 dB | 110.8 dB |
| Output SPL at 50 Hz | 130.3 dB | 112.7 dB |
| Output SPL at 63 Hz | 129.4 dB | 111.9 dB |
| Output SPL at 80 Hz | 128.5 dB | 109.1 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 | 111.1 dB |
| Dimensions | 40"H x 21"W x 18"D (1016.0 x 533.4 x 457.2 mm) | 18"H x 14.5"W x 17.6"D (457.2 x 368.3 x 447.0 mm) |
| Weight | 220 lbs (99.8 kg) | 108 lbs (49.0 kg) |
| Warranty | 5/3 | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Brian Kahn |
| Drivers | 2x 18" (457mm) drivers | 10" (254mm) driver |
| Cabinet Color | - | black |
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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
Magico Audio ASUB: $6,500 eBay
Pros: Independent CEA-2010 testing records 94.3 dB at 20 Hz and 111.1 dB through 40-80 Hz. The sealed enclosure with 10” (254mm) 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 457.2H x 368.3W x 447.0D mm cabinet and 49.0 kg mass still require deliberate placement and calibration.
Full Magico Audio ASUB review and specifications →
| CEA-2010-A Average (40-80Hz) | 111.1 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 18"H x 14.5"W x 17.6"D (457.2 x 368.3 x 447.0 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | sealed |
| Measurement Source | Brian Kahn |
| Output SPL at 20 Hz | 94.3 dB |
| Output SPL at 25 Hz | 99.8 dB |
| Output SPL at 31.5 Hz | 105.8 dB |
| Output SPL at 40 Hz | 110.8 dB |
| Output SPL at 50 Hz | 112.7 dB |
| Output SPL at 63 Hz | 111.9 dB |
| Output SPL at 80 Hz | 109.1 dB |
| Weight | 108 lbs (49.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brian Kahn; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons

