MartinLogan Dynamo 1600X vs Paradigm Defiance X15

Short answer: a tie on sound quality. Both are rated 4.2/5 (#2 and #38 of 145 subwoofers) at nearly the same price ($1606.77 vs $1606.77), so choose on features and fit.

The case for the MartinLogan Dynamo 1600X: Sealed 15-inch with 900W RMS, 1800W peak delivers forceful clean tight low bass. Set against that: Ported design room integration needs, mid-range 121.5 dB output, and $1,607 price.

Buy the MartinLogan Dynamo 1600X or the Paradigm Defiance X15 on features: they are rated the same for sound quality at close to the same price.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

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Prices on this page were last checked September 23, 2026 at 11:24 PM 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

MartinLogan Dynamo 1600X: $1,606.77 eBay

Pros: Sealed 15-inch with 900W RMS, 1800W peak delivers forceful clean tight low bass. Easily configurable as forward-firing or down-firing. Smartphone app with Anthem Room Correction (ARC) optimizes bass across room. Wireless capable with optional SWT-X module.

Cons: Ported design room integration needs, mid-range 121.5 dB output, and $1607 price.

Full MartinLogan Dynamo 1600X review and specifications →

AES Input	No
Amplifier Power	900W RMS / 1800W peak
Aux Input	No
CEA-2010-A Average (40-80Hz)	120.5 dB
Cabinet Color	black
Coaxial Input	No
Country	United States
Dimensions	20.1"H x 17.9"W x 19.1"D (510.5 x 454.7 x 485.1 mm)
Drivers	15" (381mm) driver
Enclosure	sealed
Frequency Response	20-200Hz, ±3dB
HDMI Input	No
Inputs	RCA (stereo and LFE), XLR (LFE), speaker-level (banana)
Measurement Source	Audioholics
Optical Input	No
Output SPL at 15 Hz	86.2 dB
Output SPL at 20 Hz	99.4 dB
Output SPL at 25 Hz	103.9 dB
Output SPL at 31.5 Hz	111.7 dB
Output SPL at 40 Hz	118.4 dB
Output SPL at 50 Hz	121.0 dB
Output SPL at 63 Hz	121.8 dB
Output SPL at 80 Hz	121.0 dB
Output SPL at 100 Hz	120.2 dB
Output SPL at 125 Hz	119.0 dB
RCA Input	Yes
TRS Input	No
USB Input	No
Warranty	3
Weight	56 lbs (25.4 kg)
XLR Input	Yes

• Links
  • MartinLogan Dynamo 1600X 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 1600X vs HSU Research ULS-15 MK2
  • MartinLogan Dynamo 1600X vs JTR Speakers Captivator 212PRO
  • MartinLogan Dynamo 1600X vs Monoprice SW-12
  • MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15
  • MartinLogan Dynamo 1600X vs Paradigm Defiance X12
  • MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15-BASE
  • MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15SEICE-BASE
  • MartinLogan Dynamo 1600X vs Monoprice SW-15
  • See all 48 comparisons

Paradigm Defiance X15: $1,606.77 eBay

Pros: Independent CEA-2010 testing records 109.2 dB at 20 Hz and 122.9 dB through 40-80 Hz. The ported, bottom enclosure with 15” (381mm) driver has the headroom for demanding film bass in a large room.

Cons: The 625.3H x 588.8W x 625.3D mm cabinet and 41.7 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 Paradigm Defiance X15 review and specifications →

CEA-2010-A Average (40-80Hz)	122.9 dB
Cabinet Color	black
Country	Canada
Dimensions	24.6"H x 23.2"W x 24.6"D (625.3 x 588.8 x 625.3 mm)
Drivers	15" (381mm) driver
Enclosure	ported, bottom
Measurement Source	Audioholics
Output SPL at 15 Hz	102.8 dB
Output SPL at 20 Hz	109.2 dB
Output SPL at 25 Hz	112.2 dB
Output SPL at 31.5 Hz	116.2 dB
Output SPL at 40 Hz	121.3 dB
Output SPL at 50 Hz	123.4 dB
Output SPL at 63 Hz	123.8 dB
Output SPL at 80 Hz	123.1 dB
Output SPL at 100 Hz	121.9 dB
Output SPL at 125 Hz	121.2 dB
Warranty	3
Weight	91.9 lbs (41.7 kg)

• Links
  • Paradigm Defiance X15 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
  • Paradigm Defiance X15 vs JTR Speakers Captivator 118HT
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  • Paradigm Defiance X15 vs Monoprice Monolith 16 THX Ultra
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