Monoprice SW-15 vs Monoprice Monolith 10 THX Select

Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the Monoprice Monolith 10 THX Select ranks #90 and costs $699, so there is little reason to consider the other one.

What the Monoprice SW-15 offers: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup. Watch for: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.

What the Monoprice Monolith 10 THX Select offers: THX-certified 10-inch ported with 500W amp extends down to 20Hz with no internal resonance or port noise. HDF cabinet construction ensures inert enclosure. Variable phase adjustment and robust built-to-last design. Watch for: No detailed measurement caveats are currently recorded.

Buy the Monoprice SW-15. It ranks higher for sound quality than the Monoprice Monolith 10 THX Select and costs less, so the other one has nothing left to offer.

Looking for alternatives? See the complete Subwoofers rankings.

Specifications Side By Side

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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 SW-15: $374.99 Amazon eBay

Pros: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup.

Cons: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.

Notes: Product # 41499

Full Monoprice SW-15 review and specifications →

Amplifier Power	600W RMS / 800W peak
CEA-2010-A Average (40-80Hz)	119.0 dB
Cabinet Color	black
Country	United States
Crossover Frequency	40-150Hz, 18dB/octave
Dimensions	18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm)
Drivers	15" (381mm) driver
Enclosure	ported, bottom
Frequency Response	30-150Hz (-10dB)
Inputs	Stereo line level and speaker level
Measurement Source	Audioholics
Output SPL at 15 Hz	90.0 dB
Output SPL at 20 Hz	101.2 dB
Output SPL at 25 Hz	106.3 dB
Output SPL at 31.5 Hz	111.2 dB
Output SPL at 40 Hz	116.0 dB
Output SPL at 50 Hz	120.2 dB
Output SPL at 63 Hz	120.5 dB
Output SPL at 80 Hz	119.5 dB
Phase Control	0° or 180°
Warranty	1
Weight	66.1 lbs (30.0 kg)

• Links
  • Monoprice SW-15 Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
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Monoprice Monolith 10 THX Select: $699 eBay

Pros: THX-certified 10-inch ported with 500W amp extends down to 20Hz with no internal resonance or port noise. HDF cabinet construction ensures inert enclosure. Variable phase adjustment and robust built-to-last design.

Notes: Product # 24456

Full Monoprice Monolith 10 THX Select review and specifications →

Amplifier Power	500W RMS
CEA-2010-A Average (40-80Hz)	111.5 dB
Cabinet Color	black
Country	United States
Dimensions	18.9"H x 15"W x 19.7"D (480.1 x 381.0 x 500.4 mm)
Drivers	10" (254mm) driver
Enclosure	ported, front
Frequency Response	17-20Hz
Measurement Source	ErinsAudioCorner
Output SPL at 15 Hz	95.4 dB
Output SPL at 20 Hz	102.6 dB
Output SPL at 25 Hz	107.7 dB
Output SPL at 31.5 Hz	109.0 dB
Output SPL at 40 Hz	110.0 dB
Output SPL at 50 Hz	112.0 dB
Output SPL at 63 Hz	112.0 dB
Output SPL at 80 Hz	112.0 dB
Output SPL at 100 Hz	112.0 dB
Output SPL at 125 Hz	111.0 dB
Warranty	5
Weight	72.5 lbs (32.9 kg)

• Links
  • Monoprice Monolith 10 THX Select Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • Monoprice Monolith 10 THX Select vs SVS SB-3000