JTR Speakers Captivator S2 vs XTZ Sound SUB 3X12

Short answer: the JTR Speakers Captivator S2 on measured sound quality, the XTZ Sound SUB 3X12 on price. The JTR Speakers Captivator S2 ranks #9 of 110 subwoofers at $3995. The XTZ Sound SUB 3X12 ranks #26 at $1412.84, $2582.16 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 XTZ Sound SUB 3X12 offers: Independent CEA-2010 testing records 114.5 dB at 20 Hz and 125.3 dB through 40-80 Hz. The ported, front enclosure with 3x 12” (305mm) drivers has the headroom for demanding film bass in a large room. Watch for: The 1158.2H x 535.9W x 556.3D mm cabinet and 77.4 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 JTR Speakers Captivator S2 if sound quality matters more than the price. Buy the XTZ Sound SUB 3X12 if the price matters more than sound quality.

Looking for alternatives? See the complete Subwoofers rankings.

Specifications Side By Side

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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
  • JTR Speakers Captivator S2 Website
• 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
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XTZ Sound SUB 3X12: $1,412.84 eBay

Pros: Independent CEA-2010 testing records 114.5 dB at 20 Hz and 125.3 dB through 40-80 Hz. The ported, front enclosure with 3x 12” (305mm) drivers has the headroom for demanding film bass in a large room.

Cons: The 1158.2H x 535.9W x 556.3D mm cabinet and 77.4 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 XTZ Sound SUB 3X12 review and specifications →

CEA-2010-A Average (40-80Hz)	125.3 dB
Cabinet Color	black
Country	Sweden
Dimensions	45.6"H x 21.1"W x 21.9"D (1158.2 x 535.9 x 556.3 mm)
Drivers	3x 12" (305mm) drivers
Enclosure	ported, front
Measurement Source	Audioholics
Output SPL at 12.5 Hz	100.0 dB
Output SPL at 15 Hz	109.1 dB
Output SPL at 20 Hz	114.5 dB
Output SPL at 25 Hz	118.5 dB
Output SPL at 31.5 Hz	121.8 dB
Output SPL at 40 Hz	124.8 dB
Output SPL at 50 Hz	125.4 dB
Output SPL at 63 Hz	125.4 dB
Output SPL at 80 Hz	125.6 dB
Output SPL at 100 Hz	126.1 dB
Output SPL at 125 Hz	126.4 dB
Warranty	5/2
Weight	170.6 lbs (77.4 kg)

• Links
  • XTZ Sound SUB 3X12 Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • XTZ Sound SUB 3X12 vs Power Sound Audio (PSA) XS30
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