HSU Research ULS-15 MK2 vs Monitor Audio RXW12

Last updated: September 16, 2026

Short answer: the HSU Research ULS-15 MK2 on measured sound quality, the Monitor Audio RXW12 on price. The HSU Research ULS-15 MK2 ranks #3 of 145 subwoofers at $999. The Monitor Audio RXW12 ranks #98 at $799, $200 cheaper.

HSU Research ULS-15 MK2 vs Monitor Audio RXW12

What the HSU Research ULS-15 MK2 offers: Sealed design delivers tight, accurate bass with low bloat. 600W BASH amplifier. 30% less expensive and 20 lbs lighter than predecessor. Easy integration with Q and EQ controls. Great value in the 15” sub market at under $850 shipped. Watch for: No detailed measurement caveats are currently recorded.

What the Monitor Audio RXW12 offers: Sealed 12-inch with 500W RMS delivers terrific output peaking at 122dB at 63Hz. Powerful punchy bass with excellent pitch definition. Well-suited for small to medium rooms. Watch for: No detailed measurement caveats are currently recorded.

Buy the HSU Research ULS-15 MK2 if sound quality matters more than the price. Buy the Monitor Audio RXW12 if the price matters more than sound quality.

Want more options? Browse the full Subwoofers rankings.

Buy the HSU Research ULS-15 MK2 at HSU Research ($999.00) →

Specifications Side By Side

HSU Research ULS-15 MK2 Monitor Audio RXW12
Price$1,035$799
Ranked#3 of 145 in Medium Home Subwoofers (30-75 lbs)#98 of 145 in Medium Home Subwoofers (30-75 lbs)
Enclosuresealedsealed
Output SPL at 12.5 Hz93.7 dB-
Output SPL at 15 Hz98.0 dB-
Output SPL at 20 Hz102.4 dB88.9 dB
Output SPL at 25 Hz107.7 dB92.0 dB
Output SPL at 31.5 Hz113.4 dB97.9 dB
Output SPL at 40 Hz118.3 dB111.5 dB
Output SPL at 50 Hz120.8 dB114.9 dB
Output SPL at 63 Hz121.2 dB106.3 dB
Output SPL at 80 Hz121.1 dB-
Output SPL at 100 Hz120.7 dB-
Output SPL at 125 Hz120.7 dB-
CEA-2010-A Average (40-80Hz)120.3 dB110.9 dB (avg of 3/4 bands)
Dimensions19"H x 18"W x 19.5"D (482.6 x 457.2 x 495.3 mm)15"H x 16.9"W x 16.9"D (381.0 x 430.0 x 430.0 mm)
Weight65 lbs (29.5 kg)49.8 lbs (22.6 kg)
Warranty7/2(+3)5
Cabinet Colorblack, wood-
CountryUnited StatesUnited Kingdom
Measurement SourceAudioholicsBrent Butterworth
Frequency Response20-200Hz, ±1dB21-40Hz
Amplifier Power600W RMS / 2000W peak500W RMS
Crossover Frequency30-90Hz adjustable-
Phase Control0°-180°-
FeaturesQ control, sealed subwoofer, EQ1/EQ2 modes-
Drivers15" (381mm) driver12" (305mm) driver
Buy the HSU Research ULS-15 MK2 at HSU Research ($999.00) →

How HSU Research ULS-15 MK2 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

HSU Research ULS-15 MK2: $1,035 HSU Research eBay

HSU Research ULS-15 MK2 ranking card

Pros: Sealed design delivers tight, accurate bass with low bloat. 600W BASH amplifier. 30% less expensive and 20 lbs lighter than predecessor. Easy integration with Q and EQ controls. Great value in the 15” sub market at under $850 shipped.

Notes: Price includes shipping

Full HSU Research ULS-15 MK2 review and specifications →

Amplifier Power600W RMS / 2000W peak
CEA-2010-A Average (40-80Hz)120.3 dB
Cabinet Colorblack, wood
CountryUnited States
Crossover Frequency30-90Hz adjustable
Dimensions19"H x 18"W x 19.5"D (482.6 x 457.2 x 495.3 mm)
Drivers15" (381mm) driver
Enclosuresealed
FeaturesQ control, sealed subwoofer, EQ1/EQ2 modes
Frequency Response20-200Hz, ±1dB
Measurement SourceAudioholics
Output SPL at 12.5 Hz93.7 dB
Output SPL at 15 Hz98.0 dB
Output SPL at 20 Hz102.4 dB
Output SPL at 25 Hz107.7 dB
Output SPL at 31.5 Hz113.4 dB
Output SPL at 40 Hz118.3 dB
Output SPL at 50 Hz120.8 dB
Output SPL at 63 Hz121.2 dB
Output SPL at 80 Hz121.1 dB
Output SPL at 100 Hz120.7 dB
Output SPL at 125 Hz120.7 dB
Phase Control0°-180°
Warranty7/2(+3)
Weight65 lbs (29.5 kg)
Check current price at HSU Research ($999.00) →Search eBay for HSU Research ULS-15 MK2 →

Monitor Audio RXW12: $799 eBay

Monitor Audio RXW12 ranking card

Pros: Sealed 12-inch with 500W RMS delivers terrific output peaking at 122dB at 63Hz. Powerful punchy bass with excellent pitch definition. Well-suited for small to medium rooms.

Full Monitor Audio RXW12 review and specifications →

Amplifier Power500W RMS
CEA-2010-A Average (40-80Hz)110.9 dB (avg of 3/4 bands)
CountryUnited Kingdom
Dimensions15"H x 16.9"W x 16.9"D (381.0 x 430.0 x 430.0 mm)
Drivers12" (305mm) driver
Enclosuresealed
Frequency Response21-40Hz
Measurement SourceBrent Butterworth
Output SPL at 20 Hz88.9 dB
Output SPL at 25 Hz92.0 dB
Output SPL at 31.5 Hz97.9 dB
Output SPL at 40 Hz111.5 dB
Output SPL at 50 Hz114.9 dB
Output SPL at 63 Hz106.3 dB
Warranty5
Weight49.8 lbs (22.6 kg)
Search eBay for Monitor Audio RXW12 →