Rythmik F18 vs JTR Speakers Growler (2015)

Last updated: September 16, 2026

Short answer: the JTR Speakers Growler (2015) on measured sound quality, the Rythmik F18 on price. The JTR Speakers Growler (2015) ranks #13 of 110 subwoofers at $2995. The Rythmik F18 ranks #69 at $2344, $651 cheaper.

Rythmik F18 vs JTR Speakers Growler (2015)

What the Rythmik F18 offers: Independent CEA-2010 testing records 106.2 dB at 20 Hz and 119.5 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room. Watch for: The 520.7H x 520.7W x 533.4D mm cabinet and 52.2 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

What the JTR Speakers Growler (2015) offers: 12-inch ported driver reaches 130.2dB CEA-2010-A average, nearly matching the class leader for about $1,000 less. Watch for: Ported design room interaction, 45 kg size, and $2,995 cost.

Buy the Rythmik F18 if the price matters more than sound quality. Buy the JTR Speakers Growler (2015) if sound quality matters more than the price.

Looking for alternatives? See the complete Subwoofers rankings.

Buy the Rythmik F18 at Rythmik Audio ($2,344) →

Specifications Side By Side

Rythmik F18 JTR Speakers Growler (2015)
Price$1,850$2995 Passive
Ranked#69 of 110 in Large Home Subwoofers (Over 75 lbs)#13 of 110 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)
Warranty5/3-
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceData-bassData-bass
Drivers18" (457mm) driver12" (305mm) driver
Passive-Yes
Buy the Rythmik F18 at Rythmik Audio ($2,344) →

More worthwhile head-to-heads for JTR Speakers Growler (2015):

Prices on this page were last checked September 16, 2026 at 12:41 AM 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

Rythmik F18: $1,850 Rythmik Audio eBay

Rythmik F18 ranking card

Pros: Independent CEA-2010 testing records 106.2 dB at 20 Hz and 119.5 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 520.7H x 520.7W x 533.4D mm cabinet and 52.2 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

Full Rythmik F18 review and specifications →

CEA-2010-A Average (40-80Hz)119.5 dB
Cabinet Colorblack
CountryUnited States
Dimensions20.5"H x 20.5"W x 21"D (520.7 x 520.7 x 533.4 mm)
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceData-bass
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 dB
Output SPL at 25 Hz110.9 dB
Output SPL at 31.5 Hz114.3 dB
Output SPL at 40 Hz117.1 dB
Output SPL at 50 Hz119.1 dB
Output SPL at 63 Hz120.5 dB
Output SPL at 80 Hz121.2 dB
Output SPL at 100 Hz121.4 dB
Output SPL at 125 Hz121.4 dB
Warranty5/3
Weight115.1 lbs (52.2 kg)
Check current price at Rythmik Audio ($2,344) →Search eBay for Rythmik F18 →

JTR Speakers Growler (2015): $2995 Passive eBay

JTR Speakers Growler (2015) ranking card

Pros: 12-inch ported driver reaches 130.2dB CEA-2010-A average, nearly matching the class leader for about $1,000 less.

Cons: Ported design room interaction, 45 kg size, and $2,995 cost.

Notes: Looks like “PA sub”

Full JTR Speakers Growler (2015) review and specifications →

CEA-2010-A Average (40-80Hz)130.2 dB
CountryUnited States
Dimensions22.5"H x 30"W x 20"D (571.5 x 762.0 x 508.0 mm)
Drivers12" (305mm) driver
Enclosureported, front
Measurement SourceData-bass
Output SPL at 20 Hz92.8 dB
Output SPL at 25 Hz97.2 dB
Output SPL at 31.5 Hz106.6 dB
Output SPL at 40 Hz122.7 dB
Output SPL at 50 Hz130.0 dB
Output SPL at 63 Hz133.6 dB
Output SPL at 80 Hz134.4 dB
Output SPL at 100 Hz135.5 dB
Output SPL at 125 Hz136.0 dB
PassiveYes
Weight100.1 lbs (45.4 kg)
Search eBay for JTR Speakers Growler (2015) →