Reaction Audio PV-15X vs JBL 4645C

Last updated: September 14, 2026

Short answer: the Reaction Audio PV-15X. It ranks #21 of 110 subwoofers by sound quality at $1999; the JBL 4645C ranks #24 and costs $4999, so there is little reason to consider the other one.

Reaction Audio PV-15X vs JBL 4645C

What the Reaction Audio PV-15X offers: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet. Watch for: Passive design requires a separate external amplifier and weighs 68 kg.

What the JBL 4645C offers: Independent CEA-2010 testing records 98.9 dB at 20 Hz and 127.3 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver is best suited to upper-bass support in a modest room. Watch for: Deep-bass output is limited relative to its midbass result, so it is not the right choice for the lowest movie effects. The 1009.6H x 673.1W x 450.8D mm cabinet and 62.6 kg mass still need deliberate placement and calibration.

Buy the Reaction Audio PV-15X. It ranks higher for sound quality than the JBL 4645C and costs less, so the other one has nothing left to offer.

Looking for alternatives? See the complete Subwoofers rankings.

Specifications Side By Side

Reaction Audio PV-15X JBL 4645C
Price$1999 Discontinued$4999 Passive
Ranked#21 of 110 in Large Home Subwoofers (Over 75 lbs)#24 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, rearported, front
Output SPL at 15 Hz105.3 dB-
Output SPL at 20 Hz111.3 dB98.9 dB
Output SPL at 25 Hz116.1 dB114.0 dB
Output SPL at 31.5 Hz119.8 dB118.7 dB
Output SPL at 40 Hz125.3 dB122.0 dB
Output SPL at 50 Hz126.8 dB123.7 dB
Output SPL at 63 Hz126.1 dB129.7 dB
Output SPL at 80 Hz126.5 dB133.9 dB
Output SPL at 100 Hz126.4 dB135.1 dB
Output SPL at 125 Hz126.1 dB135.8 dB
CEA-2010-A Average (40-80Hz)126.2 dB127.3 dB
Dimensions18"H x 22"W x 29"D (457.2 x 558.8 x 736.6 mm)39.7"H x 26.5"W x 17.7"D (1009.6 x 673.1 x 450.8 mm)
Measurement SourceData-bassData-bass
DiscontinuedYes-
Weight149.9 lbs (68 kg)138 lbs (62.6 kg)
Drivers15" (381mm) driver18" (457mm) driver
Passive-Yes
Warranty-5/3/2
Cabinet Color-black
Country-United States

More worthwhile head-to-heads for Reaction Audio PV-15X:

Prices on this page were last checked September 14, 2026 at 1:47 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

Reaction Audio PV-15X: $1999 Discontinued eBay

Reaction Audio PV-15X ranking card

Pros: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet.

Cons: Passive design requires a separate external amplifier and weighs 68 kg. Discontinued.

Full Reaction Audio PV-15X review and specifications →

CEA-2010-A Average (40-80Hz)126.2 dB
Dimensions18"H x 22"W x 29"D (457.2 x 558.8 x 736.6 mm)
DiscontinuedYes
Drivers15" (381mm) driver
Enclosureported, rear
Measurement SourceData-bass
Output SPL at 15 Hz105.3 dB
Output SPL at 20 Hz111.3 dB
Output SPL at 25 Hz116.1 dB
Output SPL at 31.5 Hz119.8 dB
Output SPL at 40 Hz125.3 dB
Output SPL at 50 Hz126.8 dB
Output SPL at 63 Hz126.1 dB
Output SPL at 80 Hz126.5 dB
Output SPL at 100 Hz126.4 dB
Output SPL at 125 Hz126.1 dB
Weight149.9 lbs (68 kg)
Search eBay for Reaction Audio PV-15X →

JBL 4645C: $4999 Passive eBay

JBL 4645C ranking card

Pros: Independent CEA-2010 testing records 98.9 dB at 20 Hz and 127.3 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver is best suited to upper-bass support in a modest room.

Cons: Deep-bass output is limited relative to its midbass result, so it is not the right choice for the lowest movie effects. The 1009.6H x 673.1W x 450.8D mm cabinet and 62.6 kg mass still need deliberate placement and calibration.

Full JBL 4645C review and specifications →

CEA-2010-A Average (40-80Hz)127.3 dB
Cabinet Colorblack
CountryUnited States
Dimensions39.7"H x 26.5"W x 17.7"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)
Search eBay for JBL 4645C →