JTR Speakers Captivator 212PRO vs Rythmik F12

Short answer: the Rythmik F12 on value, the JTR Captivator 212PRO on amplifier power. The F12 is a sealed 12-inch servo sub with 370W RMS that offers excellent value at $1439 against $2799. The JTR answers with a dual 12-inch ported cabinet and a 1200W DSP amp, though its 32 kg frame and ported design need room integration.

What the JTR Speakers Captivator 212PRO gets right: Dual 12-inch ported with 1200W DSP amp and full digital sound processor. Set against that: Premium pricing at $2,600, ported room interaction, and 32 kg (70.5 lbs) mid-size footprint.

On the Rythmik F12 side: Sealed 12-inch servo with 370W RMS offers excellent value.

Buy the JTR Speakers Captivator 212PRO. It is rated higher for sound quality, and saving $1360 with the Rythmik F12 does not make up for the sound-quality gap.

Looking for alternatives? See the complete Subwoofers rankings.

Specifications Side By Side

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Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full

JTR Speakers Captivator 212PRO: $2,600 JTR Speakers eBay

Pros: Dual 12-inch ported with 1200W DSP amp and full digital sound processor. Dual-12 output beyond impressive with distortion-free performance. Bulletproof construction for pro sound installations.

Cons: Premium pricing at $2799, ported room interaction, and 32 kg mid-size footprint.

Notes: Looks like “PA sub”

Full JTR Speakers Captivator 212PRO review and specifications →

AES Input	No
Amplifier Power	1200W RMS; Class D with DSP
Aux Input	No
CEA-2010-A Average (40-80Hz)	129.1 dB
Cabinet Color	black
Coaxial Input	No
Country	United States
Dimensions	16"H x 30"W x 22.5"D (406.4 x 762.0 x 571.5 mm)
Drivers	2x 12" (305mm) drivers
Enclosure	ported, front
HDMI Input	No
Inputs	XLR and RCA
Measurement Source	Data-bass
Optical Input	No
Output SPL at 25 Hz	95.4 dB
Output SPL at 31.5 Hz	112.2 dB
Output SPL at 40 Hz	122.7 dB
Output SPL at 50 Hz	129.2 dB
Output SPL at 63 Hz	131.3 dB
Output SPL at 80 Hz	133.2 dB
Output SPL at 100 Hz	134.6 dB
Output SPL at 125 Hz	135.2 dB
RCA Input	Yes
TRS Input	No
USB Input	No
Warranty	5/3
Weight	71 lbs (32.2 kg)
XLR Input	Yes

• Links
  • JTR Speakers Captivator 212PRO 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
  • JTR Speakers Captivator 212PRO vs MartinLogan Dynamo 1600X
  • JTR Speakers Captivator 212PRO vs HSU Research ULS-15 MK2
  • JTR Speakers Captivator 212PRO vs Monoprice SW-12
  • JTR Speakers Captivator 212PRO vs Power Sound Audio (PSA) XV15
  • JTR Speakers Captivator 212PRO vs Monoprice SW-15
  • JTR Speakers Captivator 212PRO vs SVS SB-3000
  • JTR Speakers Captivator 212PRO vs Power Sound Audio (PSA) XS15SE
  • JTR Speakers Captivator 212PRO vs JBL HDI-1200P
  • See all 15 comparisons

Rythmik F12: $1,120 Rythmik Audio eBay

Pros: Sealed 12-inch servo with 370W RMS offers excellent value. Very musical and can disappear in small rooms. Digs to 14Hz with excellent build quality and well-braced cabinet.

Full Rythmik F12 review and specifications →

AES Input	No
Amplifier Power	370W RMS
Aux Input	No
CEA-2010-A Average (40-80Hz)	119.3 dB
Cabinet Color	black
Coaxial Input	No
Country	United States
Dimensions	15.7"H x 15.7"W x 17"D (400.0 x 400.0 x 431.8 mm)
Drivers	12" (305mm) driver
Enclosure	sealed
Frequency Response	14Hz extension
HDMI Input	No
Inputs	XLR (2), RCA (line/LFE)
Measurement Source	Brent Butterworth
Optical Input	No
Output SPL at 16 Hz	101.0 dB
Output SPL at 20 Hz	103.6 dB
Output SPL at 25 Hz	106.7 dB
Output SPL at 31.5 Hz	113.5 dB
Output SPL at 40 Hz	118.3 dB
Output SPL at 50 Hz	119.1 dB
Output SPL at 63 Hz	120.4 dB
Output SPL at 80 Hz	119.6 dB
RCA Input	Yes
TRS Input	No
USB Input	No
Warranty	5/3
Weight	75 lbs (34.0 kg)
XLR Input	Yes

• Links
  • Rythmik F12 Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • Rythmik F12 vs Power Sound Audio (PSA) XS15SE
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  • Rythmik F12 vs Monoprice SW-15
  • Rythmik F12 vs Power Sound Audio (PSA) XV15
  • Rythmik F12 vs SVS SB-2000
  • Rythmik F12 vs Monoprice SW-12
  • See all 20 comparisons