Monoprice Monolith M-15 V2 vs Monoprice Monolith M-215

Last updated: September 17, 2026

Short answer: the Monoprice Monolith M-215 on measured sound quality, the Monoprice Monolith M-15 V2 on price. The Monoprice Monolith M-215 ranks #23 of 110 subwoofers, rated 4.4/5, at $2999.99. The Monoprice Monolith M-15 V2 ranks #64, rated 4.2/5, at $1500, $1499.99 cheaper.

Monoprice Monolith M-15 V2 vs Monoprice Monolith M-215

Buy the Monoprice Monolith M-15 V2 when the price outweighs sound quality for you, and the Monoprice Monolith M-215 when sound quality outweighs the price instead.

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

Buy the Monoprice Monolith M-215 at Monoprice ($2999.99) →

Specifications Side By Side

Monoprice Monolith M-15 V2 Monoprice Monolith M-215
Price$1,500 Discontinued$2999.99
Ranked#64 of 110 in Large Home Subwoofers (Over 75 lbs)#23 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 12.5 Hz91.0 dB103.9 dB
Output SPL at 15 Hz106.3 dB113.1 dB
Output SPL at 20 Hz112.6 dB118.9 dB
Output SPL at 25 Hz116.6 dB122.6 dB
Output SPL at 31.5 Hz119.5 dB125.2 dB
Output SPL at 40 Hz120.9 dB126.4 dB
Output SPL at 50 Hz120.6 dB126.1 dB
Output SPL at 63 Hz120.0 dB125.6 dB
Output SPL at 80 Hz118.7 dB125.6 dB
Output SPL at 100 Hz120.1 dB125.7 dB
Output SPL at 125 Hz120.2 dB126.3 dB
CEA-2010-A Average (40-80Hz)120.0 dB125.9 dB
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Weight132.9 lbs (60.3 kg)216.1 lbs (98.0 kg)
Warranty55
Cabinet Colorblackblack
CountryUnited StatesUnited States
Measurement SourceManufacturerBrent Butterworth
Drivers15" (381mm) driver2x 15" (381mm) drivers
DiscontinuedYes-
InputsXLR, RCA-
XLR InputYes-
RCA InputYes-
TRS InputNo-
Optical InputNo-
Coaxial InputNo-
USB InputNo-
HDMI InputNo-
AES InputNo-
Aux InputNo-
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How Monoprice Monolith M-215 compares with other leading options:

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

Monoprice Monolith M-15 V2: $1,500 Discontinued eBay

Monoprice Monolith M-15 V2 ranking card

Pros: Published CEA-2010 specifications list 112.6 dB at 20 Hz and 120.0 dB through 40-80 Hz. Its front-ported 15-inch design has substantial deep-bass and midbass headroom for cinema playback.

Cons: Discontinued and no longer sold new. At 60.3 kg and 729.0H x 449.6W x 680.7D mm, it needs committed floor space and careful room integration. Discontinued.

Notes: Product # 42851

Full Monoprice Monolith M-15 V2 review and specifications →

AES InputNo
Aux InputNo
CEA-2010-A Average (40-80Hz)120.0 dB
Cabinet Colorblack
Coaxial InputNo
CountryUnited States
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)
DiscontinuedYes
Drivers15" (381mm) driver
Enclosureported, front
HDMI InputNo
InputsXLR, RCA
Measurement SourceManufacturer
Optical InputNo
Output SPL at 12.5 Hz91.0 dB
Output SPL at 15 Hz106.3 dB
Output SPL at 20 Hz112.6 dB
Output SPL at 25 Hz116.6 dB
Output SPL at 31.5 Hz119.5 dB
Output SPL at 40 Hz120.9 dB
Output SPL at 50 Hz120.6 dB
Output SPL at 63 Hz120.0 dB
Output SPL at 80 Hz118.7 dB
Output SPL at 100 Hz120.1 dB
Output SPL at 125 Hz120.2 dB
RCA InputYes
TRS InputNo
USB InputNo
Warranty5
Weight132.9 lbs (60.3 kg)
XLR InputYes
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Monoprice Monolith M-215: $2999.99 Monoprice eBay

Monoprice Monolith M-215 ranking card

Pros: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room.

Cons: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Notes: Product # 38543

Full Monoprice Monolith M-215 review and specifications →

CEA-2010-A Average (40-80Hz)125.9 dB
Cabinet Colorblack
CountryUnited States
Dimensions42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Drivers2x 15" (381mm) drivers
Enclosureported, front
Measurement SourceBrent Butterworth
Output SPL at 12.5 Hz103.9 dB
Output SPL at 15 Hz113.1 dB
Output SPL at 20 Hz118.9 dB
Output SPL at 25 Hz122.6 dB
Output SPL at 31.5 Hz125.2 dB
Output SPL at 40 Hz126.4 dB
Output SPL at 50 Hz126.1 dB
Output SPL at 63 Hz125.6 dB
Output SPL at 80 Hz125.6 dB
Output SPL at 100 Hz125.7 dB
Output SPL at 125 Hz126.3 dB
Warranty5
Weight216.1 lbs (98.0 kg)
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