Rythmik F18 vs SVS PB-4000

Last updated: September 17, 2026

Short answer: the SVS PB-4000. It ranks #62 of 110 subwoofers by sound quality, rated 4.2/5, at $2158.97; the Rythmik F18 ranks #69, rated 4.1/5, and costs $2344, so there is little reason to consider the other one.

Rythmik F18 vs SVS PB-4000

Buy the SVS PB-4000. It is rated higher for sound quality than the Rythmik F18 and costs less, which settles it without a real tradeoff to make.

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

Buy the SVS PB-4000 at Amazon ($2,158.97) →Buy the Rythmik F18 at Rythmik Audio ($2,344) →

Specifications Side By Side

Rythmik F18 SVS PB-4000
Price$1,850$2,158.97
Ranked#69 of 110 in Large Home Subwoofers (Over 75 lbs)#62 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
Output SPL at 10 Hz93.7 dB-
Output SPL at 12.5 Hz97.4 dB-
Output SPL at 15 Hz102.0 dB102.1 dB
Output SPL at 20 Hz106.2 dB115.3 dB
Output SPL at 25 Hz110.9 dB116.3 dB
Output SPL at 31.5 Hz114.3 dB117.8 dB
Output SPL at 40 Hz117.1 dB119.8 dB
Output SPL at 50 Hz119.1 dB121.7 dB
Output SPL at 63 Hz120.5 dB120.7 dB
Output SPL at 80 Hz121.2 dB119.2 dB
Output SPL at 100 Hz121.4 dB118.1 dB
Output SPL at 125 Hz121.4 dB117.5 dB
CEA-2010-A Average (40-80Hz)119.5 dB120.3 dB
Dimensions20.5"H x 20.5"W x 21"D (520.7 x 520.7 x 533.4 mm)23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm)
Weight115.1 lbs (52.2 kg)153.2 lbs (69.5 kg)
Warranty5/35
Cabinet Colorblackblack
CountryUnited StatesUnited States
Measurement SourceData-bassAudioholics
Drivers18" (457mm) driver13.5" (343mm) driver with ported design
InputsXLR (2), RCA (line/LFE)XLR (balanced), RCA (LFE/stereo)
XLR InputYesYes
RCA InputYesYes
TRS InputNoNo
Optical InputNoNo
Coaxial InputNoNo
USB InputNoNo
HDMI InputNoNo
AES InputNoNo
Aux InputNoNo
Buy the SVS PB-4000 at Amazon ($2,158.97) →Buy the Rythmik F18 at Rythmik Audio ($2,344) →

More worthwhile head-to-heads for SVS PB-4000:

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

Rythmik F18: $1,850 Rythmik Audio eBay

Rythmik F18 ranking card

Pros: Independent CEA-2010 testing records 106.2 dB at 20 Hz and 119.5 dB through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 520.7H x 520.7W x 533.4D mm cabinet and 52.2 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

Full Rythmik F18 review and specifications →

AES InputNo
Aux InputNo
CEA-2010-A Average (40-80Hz)119.5 dB
Cabinet Colorblack
Coaxial InputNo
CountryUnited States
Dimensions20.5"H x 20.5"W x 21"D (520.7 x 520.7 x 533.4 mm)
Drivers18" (457mm) driver
Enclosuresealed
HDMI InputNo
InputsXLR (2), RCA (line/LFE)
Measurement SourceData-bass
Optical InputNo
Output SPL at 10 Hz93.7 dB
Output SPL at 12.5 Hz97.4 dB
Output SPL at 15 Hz102.0 dB
Output SPL at 20 Hz106.2 dB
Output SPL at 25 Hz110.9 dB
Output SPL at 31.5 Hz114.3 dB
Output SPL at 40 Hz117.1 dB
Output SPL at 50 Hz119.1 dB
Output SPL at 63 Hz120.5 dB
Output SPL at 80 Hz121.2 dB
Output SPL at 100 Hz121.4 dB
Output SPL at 125 Hz121.4 dB
RCA InputYes
TRS InputNo
USB InputNo
Warranty5/3
Weight115.1 lbs (52.2 kg)
XLR InputYes
Check current price at Rythmik Audio ($2,344) →Search eBay for Rythmik F18 →

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 →