HSU Research VTF-15H MK2 vs JBL 4645C

Last updated: September 16, 2026

Short answer: the JBL 4645C if sound quality matters most, the HSU Research VTF-15H MK2 if price matters most. The JBL 4645C ranks #24 of 110 subwoofers at $4999. The HSU Research VTF-15H MK2 ranks #50 at $1499, $3500 cheaper.

HSU Research VTF-15H MK2 vs JBL 4645C

What the HSU Research VTF-15H MK2 offers: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series. Watch for: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg size, and $1,500 price point.

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 HSU Research VTF-15H MK2 when the price outweighs sound quality for you, and the JBL 4645C when sound quality outweighs the price instead.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

HSU Research VTF-15H MK2 JBL 4645C
Price$1,499$4999 Passive
Ranked#50 of 110 in Large Home Subwoofers (Over 75 lbs)#24 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 15 Hz101.6 dB-
Output SPL at 20 Hz108.4 dB98.9 dB
Output SPL at 25 Hz114.8 dB114.0 dB
Output SPL at 31.5 Hz119.4 dB118.7 dB
Output SPL at 40 Hz122.9 dB122.0 dB
Output SPL at 50 Hz122.5 dB123.7 dB
Output SPL at 63 Hz121.1 dB129.7 dB
Output SPL at 80 Hz120.5 dB133.9 dB
CEA-2010-A Average (40-80Hz)121.8 dB127.3 dB
Dimensions24"H x 18"W x 26"D (609.6 x 457.2 x 660.4 mm)39.7"H x 26.5"W x 17.7"D (1009.6 x 673.1 x 450.8 mm)
Weight110 lbs (49.9 kg)138 lbs (62.6 kg)
Warranty7/2(+3)5/3/2
Cabinet Colorblack, woodblack
CountryUnited StatesUnited States
Measurement SourceManufacturerData-bass
Drivers15" (381mm) driver18" (457mm) driver
Passive-Yes
Output SPL at 100 Hz-135.1 dB
Output SPL at 125 Hz-135.8 dB

More top alternatives to JBL 4645C:

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

HSU Research VTF-15H MK2: $1,499 eBay

HSU Research VTF-15H MK2 ranking card

Pros: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series.

Cons: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg size, and $1,500 price point.

Notes: Price includes shipping

Full HSU Research VTF-15H MK2 review and specifications →

CEA-2010-A Average (40-80Hz)121.8 dB
Cabinet Colorblack, wood
CountryUnited States
Dimensions24"H x 18"W x 26"D (609.6 x 457.2 x 660.4 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceManufacturer
Output SPL at 15 Hz101.6 dB
Output SPL at 20 Hz108.4 dB
Output SPL at 25 Hz114.8 dB
Output SPL at 31.5 Hz119.4 dB
Output SPL at 40 Hz122.9 dB
Output SPL at 50 Hz122.5 dB
Output SPL at 63 Hz121.1 dB
Output SPL at 80 Hz120.5 dB
Warranty7/2(+3)
Weight110 lbs (49.9 kg)
Search eBay for HSU Research VTF-15H MK2 →

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 →