Funk Audio Ultra 21.0LX vs JTR Speakers Captivator 2400

Last updated: August 9, 2026

Short answer: the Funk Audio Ultra 21.0LX for the higher ranking, the JTR Speakers Captivator 2400 for the lower price. The Funk Audio Ultra 21.0LX ranks #14 of 97 subwoofers at $9487.26. The JTR Speakers Captivator 2400 ranks #15 at $3500, $5987.26 cheaper.

Buy the Funk Audio Ultra 21.0LX if the ranking matters more than the price. Buy the JTR Speakers Captivator 2400 if the price matters more than the ranking.

Specifications Side By Side

Funk Audio Ultra 21.0LX JTR Speakers Captivator 2400
Price$9,487.26$3,500
Ranked#14 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#15 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
Output SPL at 10 Hz99.9 dB104.8 dB
Output SPL at 12.5 Hz102.3 dB109.1 dB
Output SPL at 15 Hz108.4 dB113.6 dB
Output SPL at 20 Hz116.6 dB115.5 dB
Output SPL at 25 Hz120.5 dB120.0 dB
Output SPL at 31.5 Hz121.2 dB123.3 dB
Output SPL at 40 Hz125.0 dB126.2 dB
Output SPL at 50 Hz127.2 dB126.7 dB
Output SPL at 63 Hz126.5 dB126.3 dB
Output SPL at 80 Hz126.6 dB125.8 dB
Output SPL at 100 Hz127.6 dB125.8 dB
CEA-2010-A Average (40-80Hz)126.3 dB126.2 dB
Dimensions25.5"H x 24.5"W x 24.0"D (647.7 x 622.3 x 609.6 mm)30.0"H x 20.0"W x 22.5"D (762.0 x 508.0 x 571.5 mm)
Weight145.1 lbs / 65.8 kg147.9 lbs / 67.1 kg
Warranty35/3
Cabinet Colorwood, customblack, custom
CountryCanadaUnited States
Measurement SourceManufacturerAudioholics
Drivers21" (533mm) driver18" (457mm) driver
Output SPL at 125 Hz-124.2 dB

The Two Speakers In Full

Funk Audio Ultra 21.0LX: $9,487.26

Funk Audio Ultra 21.0LX ranking card

CEA-2010-A Average (40-80Hz)126.3 dB
Cabinet Colorwood, custom
CountryCanada
Dimensions25.5"H x 24.5"W x 24.0"D (647.7 x 622.3 x 609.6 mm)
Drivers21" (533mm) driver
Enclosuresealed
Measurement SourceManufacturer
Output SPL at 10 Hz99.9 dB
Output SPL at 12.5 Hz102.3 dB
Output SPL at 15 Hz108.4 dB
Output SPL at 20 Hz116.6 dB
Output SPL at 25 Hz120.5 dB
Output SPL at 31.5 Hz121.2 dB
Output SPL at 40 Hz125.0 dB
Output SPL at 50 Hz127.2 dB
Output SPL at 63 Hz126.5 dB
Output SPL at 80 Hz126.6 dB
Output SPL at 100 Hz127.6 dB
Warranty3
Weight145.1 lbs / 65.8 kg

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

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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.