JTR Speakers Captivator 2400 vs Monoprice Monolith 16 THX Ultra

Last updated: August 9, 2026

Short answer: the Monoprice Monolith 16 THX Ultra. It ranks #13 of 97 subwoofers at $2300; the JTR Speakers Captivator 2400 ranks #15 and costs $3500, so there is not much of a tradeoff to weigh.

The case for the Monoprice Monolith 16 THX Ultra: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked. The catch: Heavy at 78 kg and ported design can interact with room acoustics.

Buy the JTR Speakers Captivator 2400 if the price matters more than the ranking. Buy the Monoprice Monolith 16 THX Ultra if the ranking matters more than the price.

Specifications Side By Side

JTR Speakers Captivator 2400 Monoprice Monolith 16 THX Ultra
Price$3,500$2,300
Ranked#15 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#13 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 10 Hz104.8 dB-
Output SPL at 12.5 Hz109.1 dB-
Output SPL at 15 Hz113.6 dB107.3 dB
Output SPL at 20 Hz115.5 dB118.4 dB
Output SPL at 25 Hz120.0 dB123.3 dB
Output SPL at 31.5 Hz123.3 dB125.1 dB
Output SPL at 40 Hz126.2 dB126.3 dB
Output SPL at 50 Hz126.7 dB126.5 dB
Output SPL at 63 Hz126.3 dB126.6 dB
Output SPL at 80 Hz125.8 dB126.8 dB
Output SPL at 100 Hz125.8 dB127.2 dB
Output SPL at 125 Hz124.2 dB127.6 dB
CEA-2010-A Average (40-80Hz)126.2 dB126.5 dB
Dimensions30.0"H x 20.0"W x 22.5"D (762.0 x 508.0 x 571.5 mm)25.6"H x 22.0"W x 28.1"D (650.2 x 558.8 x 713.7 mm)
Weight147.9 lbs / 67.1 kg171.5 lbs / 77.8 kg
Warranty5/35
Cabinet Colorblack, customblack
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Drivers18" (457mm) driver16" (406mm) driver

The Two Speakers In Full

JTR Speakers Captivator 2400: $3,500

JTR Speakers Captivator 2400 ranking card

CEA-2010-A Average (40-80Hz)126.2 dB
Cabinet Colorblack, custom
CountryUnited States
Dimensions30.0"H x 20.0"W x 22.5"D (762.0 x 508.0 x 571.5 mm)
Drivers18" (457mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 10 Hz104.8 dB
Output SPL at 12.5 Hz109.1 dB
Output SPL at 15 Hz113.6 dB
Output SPL at 20 Hz115.5 dB
Output SPL at 25 Hz120.0 dB
Output SPL at 31.5 Hz123.3 dB
Output SPL at 40 Hz126.2 dB
Output SPL at 50 Hz126.7 dB
Output SPL at 63 Hz126.3 dB
Output SPL at 80 Hz125.8 dB
Output SPL at 100 Hz125.8 dB
Output SPL at 125 Hz124.2 dB
Warranty5/3
Weight147.9 lbs / 67.1 kg

Monoprice Monolith 16 THX Ultra: $2,300

Monoprice Monolith 16 THX Ultra ranking card

Pros: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked above it.

Cons: Heavy at 78 kg and ported design can interact with room acoustics.

Notes: Product # 42031

CEA-2010-A Average (40-80Hz)126.5 dB
Cabinet Colorblack
CountryUnited States
Dimensions25.6"H x 22.0"W x 28.1"D (650.2 x 558.8 x 713.7 mm)
Drivers16" (406mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 15 Hz107.3 dB
Output SPL at 20 Hz118.4 dB
Output SPL at 25 Hz123.3 dB
Output SPL at 31.5 Hz125.1 dB
Output SPL at 40 Hz126.3 dB
Output SPL at 50 Hz126.5 dB
Output SPL at 63 Hz126.6 dB
Output SPL at 80 Hz126.8 dB
Output SPL at 100 Hz127.2 dB
Output SPL at 125 Hz127.6 dB
Warranty5
Weight171.5 lbs / 77.8 kg

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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.