JTR Speakers Captivator 1400 vs Monoprice Monolith M-215

Last updated: September 16, 2026

Short answer: the Monoprice Monolith M-215 if sound quality matters most, the JTR Speakers Captivator 1400 if price matters most. The Monoprice Monolith M-215 ranks #23 of 110 subwoofers at $2999.99. The JTR Speakers Captivator 1400 ranks #28 at $2495, $504.99 cheaper.

JTR Speakers Captivator 1400 vs Monoprice Monolith M-215

What the JTR Speakers Captivator 1400 offers: Independent CEA-2010 testing records 116.1 dB at 20 Hz and 125.2 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room. Watch for: The 508.0H x 762.0W x 571.5D mm cabinet and 64.4 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

What the Monoprice Monolith M-215 offers: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room. Watch for: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 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 1400 if the price matters more than sound quality. Buy the Monoprice Monolith M-215 if sound quality matters more than the price.

Still deciding? The full Subwoofers rankings cover every ranked option.

Buy the Monoprice Monolith M-215 at Monoprice ($2999.99) →

Specifications Side By Side

JTR Speakers Captivator 1400 Monoprice Monolith M-215
Price$2495$2999.99
Ranked#28 of 110 in Large Home Subwoofers (Over 75 lbs)#23 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 12.5 Hz99.3 dB103.9 dB
Output SPL at 15 Hz111.9 dB113.1 dB
Output SPL at 20 Hz116.1 dB118.9 dB
Output SPL at 25 Hz119.2 dB122.6 dB
Output SPL at 31.5 Hz121.7 dB125.2 dB
Output SPL at 40 Hz124.8 dB126.4 dB
Output SPL at 50 Hz126.4 dB126.1 dB
Output SPL at 63 Hz125.4 dB125.6 dB
Output SPL at 80 Hz124.0 dB125.6 dB
Output SPL at 100 Hz126.0 dB125.7 dB
Output SPL at 125 Hz124.7 dB126.3 dB
CEA-2010-A Average (40-80Hz)125.2 dB125.9 dB
Dimensions20"H x 30"W x 22.5"D (508.0 x 762.0 x 571.5 mm)42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Weight142 lbs (64.4 kg)216.1 lbs (98.0 kg)
Warranty5/35
CountryUnited StatesUnited States
Measurement SourceData-bassBrent Butterworth
Drivers18" (457mm) driver2x 15" (381mm) drivers
Cabinet Color-black
Buy the Monoprice Monolith M-215 at Monoprice ($2999.99) →

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The Two Speakers In Full

JTR Speakers Captivator 1400: $2495 eBay

JTR Speakers Captivator 1400 ranking card

Pros: Independent CEA-2010 testing records 116.1 dB at 20 Hz and 125.2 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 508.0H x 762.0W x 571.5D mm cabinet and 64.4 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 JTR Speakers Captivator 1400 review and specifications →

CEA-2010-A Average (40-80Hz)125.2 dB
CountryUnited States
Dimensions20"H x 30"W x 22.5"D (508.0 x 762.0 x 571.5 mm)
Drivers18" (457mm) driver
Enclosureported, front
Measurement SourceData-bass
Output SPL at 12.5 Hz99.3 dB
Output SPL at 15 Hz111.9 dB
Output SPL at 20 Hz116.1 dB
Output SPL at 25 Hz119.2 dB
Output SPL at 31.5 Hz121.7 dB
Output SPL at 40 Hz124.8 dB
Output SPL at 50 Hz126.4 dB
Output SPL at 63 Hz125.4 dB
Output SPL at 80 Hz124.0 dB
Output SPL at 100 Hz126.0 dB
Output SPL at 125 Hz124.7 dB
Warranty5/3
Weight142 lbs (64.4 kg)
Search eBay for JTR Speakers Captivator 1400 →

Monoprice Monolith M-215: $2999.99 Monoprice eBay

Monoprice Monolith M-215 ranking card

Pros: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room.

Cons: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Notes: Product # 38543

Full Monoprice Monolith M-215 review and specifications →

CEA-2010-A Average (40-80Hz)125.9 dB
Cabinet Colorblack
CountryUnited States
Dimensions42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Drivers2x 15" (381mm) drivers
Enclosureported, front
Measurement SourceBrent Butterworth
Output SPL at 12.5 Hz103.9 dB
Output SPL at 15 Hz113.1 dB
Output SPL at 20 Hz118.9 dB
Output SPL at 25 Hz122.6 dB
Output SPL at 31.5 Hz125.2 dB
Output SPL at 40 Hz126.4 dB
Output SPL at 50 Hz126.1 dB
Output SPL at 63 Hz125.6 dB
Output SPL at 80 Hz125.6 dB
Output SPL at 100 Hz125.7 dB
Output SPL at 125 Hz126.3 dB
Warranty5
Weight216.1 lbs (98.0 kg)
Check current price at Monoprice ($2999.99) →Search eBay for Monoprice Monolith M-215 →