JBL 4645C vs JTR Speakers Growler (2015)

Last updated: October 21, 2026

Short answer: both are discontinued, so this only matters if you are buying used. Used, the JTR Speakers Growler (2015) is the better pick: it ranks #13 of 143 subwoofers by sound quality (rated 4.5/5), against #25 (rated 4.4/5) for the JBL 4645C. If you want one new, the JTR Speakers Orbit Shifter PRO ranks #1 at $4,499.

JBL 4645C vs JTR Speakers Growler (2015)

Buy the JTR Speakers Growler (2015) only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the JTR Speakers Orbit Shifter PRO instead.

Looking for alternatives? See the complete Subwoofers rankings.

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

JBL 4645C JTR Speakers Growler (2015)
Price$4,999 Passive, Discontinued$2,995 Passive, Discontinued
Ranked#25 of 143 in Large Home Subwoofers (Over 75 lbs)#13 of 143 in Large 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
Dimensions39.7”H x 26.5”W x 17.7”D (1009.6 x 673.1 x 450.8 mm)22.5”H x 30”W x 20”D (571.5 x 762.0 x 508.0 mm)
Weight138 lbs (62.6 kg)100.1 lbs (45.4 kg)
Warranty5/3/25 years
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceData-bassData-bass
Drivers18” (457mm) driver12” (305mm) driver

How JTR Speakers Growler (2015) compares with other leading options: