Monoprice SW-15 vs MartinLogan Dynamo 1500X

Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the MartinLogan Dynamo 1500X ranks #30 and costs $1299, which makes this an easy call rather than a real tradeoff.

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 MartinLogan Dynamo 1500X offers: 15-inch sealed with 650W RMS, 1300W peak delivers forceful clean tight low bass. Variable orientation (front or down-firing) configuration offers flexible room placement. PBK room correction calibrates performance across multiple listening positions. Watch for: No detailed measurement caveats are currently recorded.

Buy the Monoprice SW-15. It ranks higher for sound quality than the MartinLogan Dynamo 1500X 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 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

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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MartinLogan Dynamo 1500X: $1299 eBay

Pros: 15-inch sealed with 650W RMS, 1300W peak delivers forceful clean tight low bass. Variable orientation (front or down-firing) configuration offers flexible room placement. PBK room correction calibrates performance across multiple listening positions.

Full MartinLogan Dynamo 1500X review and specifications →

Amplifier Power	650W RMS / 1300W peak
CEA-2010-A Average (40-80Hz)	116.5 dB
Country	United States
Dimensions	18.3"H x 16.7"W x 17.6"D (464.8 x 425.4 x 447.0 mm)
Drivers	15" (381mm) driver
Enclosure	sealed
Frequency Response	20Hz+ (with room correction)
Measurement Source	Audioholics
Output SPL at 12.5 Hz	92.9 dB
Output SPL at 15 Hz	95.6 dB
Output SPL at 20 Hz	100.4 dB
Output SPL at 25 Hz	104.4 dB
Output SPL at 31.5 Hz	108.3 dB
Output SPL at 40 Hz	113.0 dB
Output SPL at 50 Hz	117.1 dB
Output SPL at 63 Hz	118.3 dB
Output SPL at 80 Hz	117.4 dB
Output SPL at 100 Hz	116.2 dB
Output SPL at 125 Hz	115.1 dB
Warranty	3
Weight	52 lbs (23.6 kg)

• Links
  • MartinLogan Dynamo 1500X Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • MartinLogan Dynamo 1500X vs MartinLogan Dynamo 1100X