HSU Research VTF-3 MK5 HP vs JBL 4645C

Last updated: September 14, 2026

Short answer: the JBL 4645C on measured sound quality, the HSU Research VTF-3 MK5 HP on price. The JBL 4645C ranks #24 of 110 subwoofers at $4999. The HSU Research VTF-3 MK5 HP ranks #52 at $1049, $3950 cheaper.

HSU Research VTF-3 MK5 HP vs JBL 4645C

What the HSU Research VTF-3 MK5 HP offers: Ported cabinet delivers 121.4dB CEA-2010-A average, one of the best price-to-output ratios in this weight class. Watch for: Ported design requires careful room placement, mid-size 39 kg cabinet, and mid-range output.

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-3 MK5 HP if the price matters more than sound quality. Buy the JBL 4645C if sound quality matters more than the price.

Still deciding? The full Subwoofers rankings cover every ranked option.

Buy the HSU Research VTF-3 MK5 HP at HSU Research ($1,049.00) →

Specifications Side By Side

HSU Research VTF-3 MK5 HP JBL 4645C
Price$1,099$4999 Passive
Ranked#52 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 Hz100.8 dB-
Output SPL at 20 Hz108.2 dB98.9 dB
Output SPL at 25 Hz113.4 dB114.0 dB
Output SPL at 31.5 Hz118.2 dB118.7 dB
Output SPL at 40 Hz121.9 dB122.0 dB
Output SPL at 50 Hz122.3 dB123.7 dB
Output SPL at 63 Hz121.1 dB129.7 dB
Output SPL at 80 Hz120.4 dB133.9 dB
CEA-2010-A Average (40-80Hz)121.4 dB127.3 dB
Dimensions25"H x 17.2"W x 24"D (635.0 x 438.1 x 609.6 mm)39.7"H x 26.5"W x 17.7"D (1009.6 x 673.1 x 450.8 mm)
Weight85.1 lbs (38.6 kg)138 lbs (62.6 kg)
Warranty7/2(+3)5/3/2
Cabinet Colorblackblack
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
Buy the HSU Research VTF-3 MK5 HP at HSU Research ($1,049.00) →

How JBL 4645C compares with other leading options:

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

HSU Research VTF-3 MK5 HP: $1,099 HSU Research eBay

HSU Research VTF-3 MK5 HP ranking card

Pros: Ported cabinet delivers 121.4dB CEA-2010-A average, one of the best price-to-output ratios in this weight class.

Cons: Ported design requires careful room placement, mid-size 39 kg cabinet, and mid-range output.

Notes: Price includes shipping

Full HSU Research VTF-3 MK5 HP review and specifications →

CEA-2010-A Average (40-80Hz)121.4 dB
Cabinet Colorblack
CountryUnited States
Dimensions25"H x 17.2"W x 24"D (635.0 x 438.1 x 609.6 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceManufacturer
Output SPL at 15 Hz100.8 dB
Output SPL at 20 Hz108.2 dB
Output SPL at 25 Hz113.4 dB
Output SPL at 31.5 Hz118.2 dB
Output SPL at 40 Hz121.9 dB
Output SPL at 50 Hz122.3 dB
Output SPL at 63 Hz121.1 dB
Output SPL at 80 Hz120.4 dB
Warranty7/2(+3)
Weight85.1 lbs (38.6 kg)
Check current price at HSU Research ($1,049.00) →Search eBay for HSU Research VTF-3 MK5 HP →

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 →