Monoprice Monolith M-15 V2 vs SVS PB-4000

Last updated: September 17, 2026

Short answer: the SVS PB-4000, if you are buying new. The Monoprice Monolith M-15 V2 measures as well as it (#64 vs #62 of 110 subwoofers, 4.2/5 vs 4.2/5) but is discontinued, so only consider it used; the SVS PB-4000 is still sold new at $2158.97.

Monoprice Monolith M-15 V2 vs SVS PB-4000

Buy the SVS PB-4000 if you want one new; the Monoprice Monolith M-15 V2 is discontinued, so only look for it used.

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

Buy the SVS PB-4000 at Amazon ($2,158.97) →

Specifications Side By Side

Monoprice Monolith M-15 V2 SVS PB-4000
Price$1,500 Discontinued$2,158.97
Ranked#64 of 110 in Large Home Subwoofers (Over 75 lbs)#62 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 12.5 Hz91.0 dB-
Output SPL at 15 Hz106.3 dB102.1 dB
Output SPL at 20 Hz112.6 dB115.3 dB
Output SPL at 25 Hz116.6 dB116.3 dB
Output SPL at 31.5 Hz119.5 dB117.8 dB
Output SPL at 40 Hz120.9 dB119.8 dB
Output SPL at 50 Hz120.6 dB121.7 dB
Output SPL at 63 Hz120.0 dB120.7 dB
Output SPL at 80 Hz118.7 dB119.2 dB
Output SPL at 100 Hz120.1 dB118.1 dB
Output SPL at 125 Hz120.2 dB117.5 dB
CEA-2010-A Average (40-80Hz)120.0 dB120.3 dB
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm)
Weight132.9 lbs (60.3 kg)153.2 lbs (69.5 kg)
Warranty55
Cabinet Colorblackblack
CountryUnited StatesUnited States
Measurement SourceManufacturerAudioholics
Drivers15" (381mm) driver13.5" (343mm) driver with ported design
DiscontinuedYes-
InputsXLR, RCAXLR (balanced), RCA (LFE/stereo)
XLR InputYesYes
RCA InputYesYes
TRS InputNoNo
Optical InputNoNo
Coaxial InputNoNo
USB InputNoNo
HDMI InputNoNo
AES InputNoNo
Aux InputNoNo
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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
Search eBay for Monoprice Monolith M-15 V2 →

SVS PB-4000: $2,158.97 Amazon eBay

SVS PB-4000 ranking card

Pros: Independent CEA-2010 testing records 115.3 dB at 20 Hz and 120.3 dB through 40-80 Hz. The ported, front enclosure with 13.5” (343mm) driver with ported design has the headroom for demanding film bass in a large room.

Cons: The 594.4H x 520.7W x 703.6D mm cabinet and 69.5 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 SVS PB-4000 review and specifications →

AES InputNo
Aux InputNo
CEA-2010-A Average (40-80Hz)120.3 dB
Cabinet Colorblack
Coaxial InputNo
CountryUnited States
Dimensions23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm)
Drivers13.5" (343mm) driver with ported design
Enclosureported, front
HDMI InputNo
InputsXLR (balanced), RCA (LFE/stereo)
Measurement SourceAudioholics
Optical InputNo
Output SPL at 15 Hz102.1 dB
Output SPL at 20 Hz115.3 dB
Output SPL at 25 Hz116.3 dB
Output SPL at 31.5 Hz117.8 dB
Output SPL at 40 Hz119.8 dB
Output SPL at 50 Hz121.7 dB
Output SPL at 63 Hz120.7 dB
Output SPL at 80 Hz119.2 dB
Output SPL at 100 Hz118.1 dB
Output SPL at 125 Hz117.5 dB
RCA InputYes
TRS InputNo
USB InputNo
Warranty5
Weight153.2 lbs (69.5 kg)
XLR InputYes
Check current price at Amazon ($2,158.97) →Search eBay for SVS PB-4000 →