Funk Audio Classic 18.0 vs Monoprice Monolith M-215

Last updated: September 16, 2026

Short answer: the Funk Audio Classic 18.0 on measured sound quality, the Monoprice Monolith M-215 on price. The Funk Audio Classic 18.0 ranks #16 of 110 subwoofers at $4893.35. The Monoprice Monolith M-215 ranks #23 at $2999.99, $1893.36 cheaper.

Funk Audio Classic 18.0 vs Monoprice Monolith M-215

What the Funk Audio Classic 18.0 offers: Independent CEA-2010 testing records 106.5 dB at 20 Hz and 127.3 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver delivers formidable upper-bass output for movie effects and music. Watch for: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 571.5H x 558.8W x 520.7D mm cabinet and 52.2 kg mass still require deliberate placement and calibration.

What the Monoprice Monolith M-215 offers: 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. Watch for: 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.

Buy the Funk Audio Classic 18.0 when sound quality outweighs the price for you, and the Monoprice Monolith M-215 when the price outweighs sound quality 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

Funk Audio Classic 18.0 Monoprice Monolith M-215
Price$4,893.35$2999.99
Ranked#16 of 110 in Large Home Subwoofers (Over 75 lbs)#23 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
Output SPL at 10 Hz94.6 dB-
Output SPL at 12.5 Hz98.4 dB103.9 dB
Output SPL at 15 Hz102.3 dB113.1 dB
Output SPL at 20 Hz106.5 dB118.9 dB
Output SPL at 25 Hz111.7 dB122.6 dB
Output SPL at 31.5 Hz119.0 dB125.2 dB
Output SPL at 40 Hz124.6 dB126.4 dB
Output SPL at 50 Hz126.8 dB126.1 dB
Output SPL at 63 Hz128.4 dB125.6 dB
Output SPL at 80 Hz129.6 dB125.6 dB
Output SPL at 100 Hz130.2 dB125.7 dB
Output SPL at 125 Hz130.8 dB126.3 dB
CEA-2010-A Average (40-80Hz)127.3 dB125.9 dB
Dimensions22.5"H x 22"W x 20.5"D (571.5 x 558.8 x 520.7 mm)42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Weight115.1 lbs (52.2 kg)216.1 lbs (98.0 kg)
Warranty35
Cabinet Colorwood, customblack
CountryCanadaUnited States
Measurement SourceData-bassBrent Butterworth
Drivers18" (457mm) driver2x 15" (381mm) drivers
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The Two Speakers In Full

Funk Audio Classic 18.0: $4,893.35 eBay

Funk Audio Classic 18.0 ranking card

Pros: Independent CEA-2010 testing records 106.5 dB at 20 Hz and 127.3 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver delivers formidable upper-bass output for movie effects and music.

Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 571.5H x 558.8W x 520.7D mm cabinet and 52.2 kg mass still require deliberate placement and calibration.

Notes: Data-bass labeled this sub as ‘FW18.0’, but original name is 18.0

Full Funk Audio Classic 18.0 review and specifications →

CEA-2010-A Average (40-80Hz)127.3 dB
Cabinet Colorwood, custom
CountryCanada
Dimensions22.5"H x 22"W x 20.5"D (571.5 x 558.8 x 520.7 mm)
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceData-bass
Output SPL at 10 Hz94.6 dB
Output SPL at 12.5 Hz98.4 dB
Output SPL at 15 Hz102.3 dB
Output SPL at 20 Hz106.5 dB
Output SPL at 25 Hz111.7 dB
Output SPL at 31.5 Hz119.0 dB
Output SPL at 40 Hz124.6 dB
Output SPL at 50 Hz126.8 dB
Output SPL at 63 Hz128.4 dB
Output SPL at 80 Hz129.6 dB
Output SPL at 100 Hz130.2 dB
Output SPL at 125 Hz130.8 dB
Warranty3
Weight115.1 lbs (52.2 kg)
Search eBay for Funk Audio Classic 18.0 →

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)
Check current price at Monoprice ($2999.99) →Search eBay for Monoprice Monolith M-215 →