JBL 4645C vs JTR Speakers Growler (2015)

Last updated: August 9, 2026

Short answer: the JTR Speakers Growler (2015). It ranks #2 of 7 subwoofers at $2995; the JBL 4645C ranks #5 and costs $4999, so there is not much of a tradeoff to weigh.

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

Buy the JBL 4645C if the price matters more than the ranking. Buy the JTR Speakers Growler (2015) if the ranking matters more than the price.

Specifications Side By Side

JBL 4645C JTR Speakers Growler (2015)
Price$4999$2995
Ranked#5 of 7 in Large Passive Home Subwoofers (Over 75 lbs)#2 of 7 in Large Passive Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
PassiveYesYes
Output SPL at 20 Hz98.9 dB92.8 dB
Output SPL at 25 Hz114.0 dB97.2 dB
Output SPL at 31.5 Hz118.7 dB106.6 dB
Output SPL at 40 Hz122.0 dB122.7 dB
Output SPL at 50 Hz123.7 dB130.0 dB
Output SPL at 63 Hz129.7 dB133.6 dB
Output SPL at 80 Hz133.9 dB134.4 dB
Output SPL at 100 Hz135.1 dB135.5 dB
Output SPL at 125 Hz135.8 dB136.0 dB
CEA-2010-A Average (40-80Hz)127.3 dB130.2 dB
Dimensions39.75"H x 26.5"W x 17.75"D (1009.6 x 673.1 x 450.8 mm)22.5"H x 30.0"W x 20.0"D (571.5 x 762.0 x 508.0 mm)
Weight138 lbs / 62.6 kg100.1 lbs / 45.4 kg
Warranty5/3/2-
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceData-bassData-bass
Drivers18" (457mm) driver12" (305mm) driver

The Two Speakers In Full

JBL 4645C: $4999

JBL 4645C ranking card

CEA-2010-A Average (40-80Hz)127.3 dB
Cabinet Colorblack
CountryUnited States
Dimensions39.75"H x 26.5"W x 17.75"D (1009.6 x 673.1 x 450.8 mm)
Drivers18" (457mm) driver
Enclosureported, front
Measurement SourceData-bass
Output SPL at 20 Hz98.9 dB
Output SPL at 25 Hz114.0 dB
Output SPL at 31.5 Hz118.7 dB
Output SPL at 40 Hz122.0 dB
Output SPL at 50 Hz123.7 dB
Output SPL at 63 Hz129.7 dB
Output SPL at 80 Hz133.9 dB
Output SPL at 100 Hz135.1 dB
Output SPL at 125 Hz135.8 dB
PassiveYes
Warranty5/3/2
Weight138 lbs / 62.6 kg

JTR Speakers Growler (2015): $2995

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”

CEA-2010-A Average (40-80Hz)130.2 dB
CountryUnited States
Dimensions22.5"H x 30.0"W x 20.0"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

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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.