Monoprice Monolith 16 THX Ultra vs HSU Research VTF-15H

Last updated: September 16, 2026

Short answer: the Monoprice Monolith 16 THX Ultra if sound quality matters most, the HSU Research VTF-15H if price matters most. The Monoprice Monolith 16 THX Ultra ranks #18 of 110 subwoofers at $2300. The HSU Research VTF-15H ranks #78 at $1199, $1101 cheaper.

Monoprice Monolith 16 THX Ultra vs HSU Research VTF-15H

What the Monoprice Monolith 16 THX Ultra offers: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked above it. Watch for: Heavy at 78 kg and ported design can interact with room acoustics.

What the HSU Research VTF-15H offers: Independent CEA-2010 testing records 107.1 dB at 20 Hz and 118.4 dB through 40-80 Hz. The ported, front enclosure with 15” (381mm) driver has the headroom for demanding film bass in a large room. Watch for: The 635.0H x 457.2W x 660.4D mm cabinet and 55.8 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Buy the Monoprice Monolith 16 THX Ultra if sound quality is the priority over the price, or the HSU Research VTF-15H if the price is the priority over sound quality.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

Monoprice Monolith 16 THX Ultra HSU Research VTF-15H
Price$2,300$1199
Ranked#18 of 110 in Large Home Subwoofers (Over 75 lbs)#78 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 15 Hz107.3 dB96.4 dB
Output SPL at 20 Hz118.4 dB107.1 dB
Output SPL at 25 Hz123.3 dB112.7 dB
Output SPL at 31.5 Hz125.1 dB116.1 dB
Output SPL at 40 Hz126.3 dB118.6 dB
Output SPL at 50 Hz126.5 dB118.3 dB
Output SPL at 63 Hz126.6 dB118.3 dB
Output SPL at 80 Hz126.8 dB118.5 dB
Output SPL at 100 Hz127.2 dB118.6 dB
Output SPL at 125 Hz127.6 dB118.9 dB
CEA-2010-A Average (40-80Hz)126.5 dB118.4 dB
Dimensions25.6"H x 22"W x 28.1"D (650.2 x 558.8 x 713.7 mm)25"H x 18"W x 26"D (635.0 x 457.2 x 660.4 mm)
Weight171.5 lbs (77.8 kg)123 lbs (55.8 kg)
Warranty57/2(+3)
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Drivers16" (406mm) driver15" (381mm) driver

More top alternatives to Monoprice Monolith 16 THX Ultra:

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

Monoprice Monolith 16 THX Ultra: $2,300 eBay

Monoprice Monolith 16 THX Ultra ranking card

Pros: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked above it.

Cons: Heavy at 78 kg and ported design can interact with room acoustics.

Notes: Product # 42031

Full Monoprice Monolith 16 THX Ultra review and specifications →

CEA-2010-A Average (40-80Hz)126.5 dB
Cabinet Colorblack
CountryUnited States
Dimensions25.6"H x 22"W x 28.1"D (650.2 x 558.8 x 713.7 mm)
Drivers16" (406mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 15 Hz107.3 dB
Output SPL at 20 Hz118.4 dB
Output SPL at 25 Hz123.3 dB
Output SPL at 31.5 Hz125.1 dB
Output SPL at 40 Hz126.3 dB
Output SPL at 50 Hz126.5 dB
Output SPL at 63 Hz126.6 dB
Output SPL at 80 Hz126.8 dB
Output SPL at 100 Hz127.2 dB
Output SPL at 125 Hz127.6 dB
Warranty5
Weight171.5 lbs (77.8 kg)
Search eBay for Monoprice Monolith 16 THX Ultra →

HSU Research VTF-15H: $1199 eBay

HSU Research VTF-15H ranking card

Pros: Independent CEA-2010 testing records 107.1 dB at 20 Hz and 118.4 dB through 40-80 Hz. The ported, front enclosure with 15” (381mm) driver has the headroom for demanding film bass in a large room.

Cons: The 635.0H x 457.2W x 660.4D mm cabinet and 55.8 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Full HSU Research VTF-15H review and specifications →

CEA-2010-A Average (40-80Hz)118.4 dB
CountryUnited States
Dimensions25"H x 18"W x 26"D (635.0 x 457.2 x 660.4 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 15 Hz96.4 dB
Output SPL at 20 Hz107.1 dB
Output SPL at 25 Hz112.7 dB
Output SPL at 31.5 Hz116.1 dB
Output SPL at 40 Hz118.6 dB
Output SPL at 50 Hz118.3 dB
Output SPL at 63 Hz118.3 dB
Output SPL at 80 Hz118.5 dB
Output SPL at 100 Hz118.6 dB
Output SPL at 125 Hz118.9 dB
Warranty7/2(+3)
Weight123 lbs (55.8 kg)
Search eBay for HSU Research VTF-15H →