Funk Audio Ultra 21.0LX vs JTR Speakers Captivator 2400

Last updated: October 21, 2026

Short answer: the JTR Speakers Captivator 2400. Both are rated 4.4/5 for sound quality (#21 and #20 of 143 subwoofers), and the JTR Speakers Captivator 2400 costs $3,500 against $17,065 for the Funk Audio Ultra 21.0LX, and with sound quality even, the cheaper one is the better buy.

Check JTR Speakers Captivator 2400 price at JTR Speakers ($3,500) →Check Funk Audio Ultra 21.0LX price at Funk Audio ($17,065) →

Funk Audio Ultra 21.0LX vs JTR Speakers Captivator 2400

Buy the JTR Speakers Captivator 2400. Both are rated the same for sound quality, and it costs $13,565 less than the Funk Audio Ultra 21.0LX.

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

Prices on this page were last checked November 7, 2026 at 7:34 PM 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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Specifications Side By Side

Funk Audio Ultra 21.0LX JTR Speakers Captivator 2400
Price$17,065$3,500
Ranked#20 of 143 in Large Home Subwoofers (Over 75 lbs)#21 of 143 in Large 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”D (647.7 x 622.3 x 609.6 mm)30”H x 20”W x 22.5”D (762.0 x 508.0 x 571.5 mm)
Weight145.1 lbs (65.8 kg)147.9 lbs (67.1 kg)
Warranty35/3
Cabinet Colorwood, customblack, custom
CountryCanadaUnited States
Measurement SourceManufacturerAudioholics
Drivers21” (533mm) driver18” (457mm) driver
InputsXLR (balanced)XLR, RCA
XLR InputYesYes
RCA InputNoYes
TRS InputNoNo
Optical InputNoNo
Coaxial InputNoNo
USB InputNoNo
HDMI InputNoNo
AES InputNoNo
Aux InputNoNo
Output SPL at 125 Hz-124.2 dB
Check JTR Speakers Captivator 2400 price at JTR Speakers ($3,500) →Check Funk Audio Ultra 21.0LX price at Funk Audio ($17,065) →

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