Monoprice Monolith 16 THX Ultra vs Power Sound Audio (PSA) XV30F

Last updated: September 16, 2026

Short answer: the Monoprice Monolith 16 THX Ultra. It ranks #18 of 110 subwoofers by sound quality at $2300; the Power Sound Audio (PSA) XV30F ranks #47 and costs $4495, which makes this an easy call rather than a real tradeoff.

Monoprice Monolith 16 THX Ultra vs Power Sound Audio (PSA) XV30F

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 Power Sound Audio (PSA) XV30F offers: Published CEA-2010 specifications list 114.9 dB at 20 Hz and 122.1 dB (avg of 3/4 bands) through 40-80 Hz. The ported, bottom enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room. Watch for: The 1143.0H x 469.9W x 571.5D mm cabinet and 70.3 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. It ranks higher for sound quality than the Power Sound Audio (PSA) XV30F and costs less, so there is no real case for the other one.

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

Specifications Side By Side

Monoprice Monolith 16 THX Ultra Power Sound Audio (PSA) XV30F
Price$2,300$4495
Ranked#18 of 110 in Large Home Subwoofers (Over 75 lbs)#47 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, bottom
Output SPL at 15 Hz107.3 dB-
Output SPL at 20 Hz118.4 dB114.9 dB
Output SPL at 25 Hz123.3 dB114.9 dB
Output SPL at 31.5 Hz125.1 dB114.9 dB
Output SPL at 40 Hz126.3 dB122.1 dB
Output SPL at 50 Hz126.5 dB122.1 dB
Output SPL at 63 Hz126.6 dB122.1 dB
Output SPL at 80 Hz126.8 dB-
Output SPL at 100 Hz127.2 dB-
Output SPL at 125 Hz127.6 dB-
CEA-2010-A Average (40-80Hz)126.5 dB122.1 dB (avg of 3/4 bands)
Dimensions25.6"H x 22"W x 28.1"D (650.2 x 558.8 x 713.7 mm)45"H x 18.5"W x 22.5"D (1143.0 x 469.9 x 571.5 mm)
Weight171.5 lbs (77.8 kg)155 lbs (70.3 kg)
Warranty55
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceAudioholicsManufacturer
Drivers16" (406mm) driver2x 15" (381mm) driver

How Monoprice Monolith 16 THX Ultra compares with other leading options:

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 →

Power Sound Audio (PSA) XV30F: $4495 eBay

Power Sound Audio (PSA) XV30F ranking card

Pros: Published CEA-2010 specifications list 114.9 dB at 20 Hz and 122.1 dB (avg of 3/4 bands) through 40-80 Hz. The ported, bottom enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room.

Cons: The 1143.0H x 469.9W x 571.5D mm cabinet and 70.3 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 Power Sound Audio (PSA) XV30F review and specifications →

CEA-2010-A Average (40-80Hz)122.1 dB (avg of 3/4 bands)
CountryUnited States
Dimensions45"H x 18.5"W x 22.5"D (1143.0 x 469.9 x 571.5 mm)
Drivers2x 15" (381mm) driver
Enclosureported, bottom
Measurement SourceManufacturer
Output SPL at 20 Hz114.9 dB
Output SPL at 25 Hz114.9 dB
Output SPL at 31.5 Hz114.9 dB
Output SPL at 40 Hz122.1 dB
Output SPL at 50 Hz122.1 dB
Output SPL at 63 Hz122.1 dB
Warranty5
Weight155 lbs (70.3 kg)
Search eBay for Power Sound Audio (PSA) XV30F →