Rythmik F18 vs JTR Speakers Growler (2015)

Last updated: October 21, 2026

Short answer: the Rythmik F18, if you are buying new. The JTR Speakers Growler (2015) ranks higher than it (#13 vs #85 of 143 subwoofers, 4.5/5 vs 4.1/5) but is discontinued, so only consider it used; the Rythmik F18 is still sold new at $2,344.

Rythmik F18 vs JTR Speakers Growler (2015)

What the Rythmik F18 does well: A massive sealed 18 inch subwoofer with tight, powerful bass and balanced XLR inputs, built for big home theaters. The tradeoff: The 520.7H x 520.7W x 533.4D mm cabinet and 115.1 lbs (52.2 kg) mass make this a serious placement and moving commitment.

The JTR Speakers Growler (2015) is the better-sounding choice. A 12 inch ported subwoofer with output close to far bigger flagships, a strong used pick now that it is discontinued. Watch for: Ported design room interaction, 99.2 lbs (45 kg) size, and $2995 cost.

Buy the Rythmik F18 new; the JTR Speakers Growler (2015) is no longer sold new, so it only makes sense as a used find.

Looking for alternatives? See the complete Subwoofers rankings.

Rythmik F18

A massive sealed 18 inch subwoofer with tight, powerful bass and balanced XLR inputs, built for big home theaters.

Driver: 18"Enclosure: SealedOutput 40-80 Hz: 119.5 dBWeight: 115.1 lbs
Rythmik Audio $2,344 eBay
$2,344
JTR Speakers Growler (2015) PassiveDiscontinued

A 12 inch ported subwoofer with output close to far bigger flagships, a strong used pick now that it is discontinued.

Driver: 12"Enclosure: PortedOutput 40-80 Hz: 130.2 dBWeight: 100.1 lbs
eBay
$2,995

Prices on this page were last checked October 31, 2026 at 7:11 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

Rythmik F18 JTR Speakers Growler (2015)
Price$2,344$2,995 Passive, Discontinued
Ranked#85 of 143 in Large Home Subwoofers (Over 75 lbs)#13 of 143 in Large Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
Output SPL at 10 Hz93.7 dB-
Output SPL at 12.5 Hz97.4 dB-
Output SPL at 15 Hz102.0 dB-
Output SPL at 20 Hz106.2 dB92.8 dB
Output SPL at 25 Hz110.9 dB97.2 dB
Output SPL at 31.5 Hz114.3 dB106.6 dB
Output SPL at 40 Hz117.1 dB122.7 dB
Output SPL at 50 Hz119.1 dB130.0 dB
Output SPL at 63 Hz120.5 dB133.6 dB
Output SPL at 80 Hz121.2 dB134.4 dB
Output SPL at 100 Hz121.4 dB135.5 dB
Output SPL at 125 Hz121.4 dB136.0 dB
CEA-2010-A Average (40-80Hz)119.5 dB130.2 dB
Dimensions20.5”H x 20.5”W x 21”D (520.7 x 520.7 x 533.4 mm)22.5”H x 30”W x 20”D (571.5 x 762.0 x 508.0 mm)
Weight115.1 lbs (52.2 kg)100.1 lbs (45.4 kg)
Warranty5/35 years
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceData-bassData-bass
Drivers18” (457mm) driver12” (305mm) driver
InputsXLR (2), RCA (line/LFE)-
XLR InputYes-
RCA InputYes-
TRS InputNo-
Optical InputNo-
Coaxial InputNo-
USB InputNo-
HDMI InputNo-
AES InputNo-
Aux InputNo-
Passive-Yes

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