Monoprice Monolith 13 THX Ultra vs SVS PB17-Ultra R-Evolution

Last updated: September 26, 2026

Short answer: the SVS PB17-Ultra R-Evolution, if you are buying new. The Monoprice Monolith 13 THX Ultra ranks higher than it (#56 vs #70 of 110 subwoofers, 4.2/5 vs 4.1/5) but is discontinued, so only consider it used; the SVS PB17-Ultra R-Evolution is still sold new at $2,599.

Monoprice Monolith 13 THX Ultra vs SVS PB17-Ultra R-Evolution

What the Monoprice Monolith 13 THX Ultra does well: Independent CEA-2010 testing records 115.0 dB at 20 Hz and 121.1 dB through 40-80 Hz. The tradeoff: The 604.5H x 515.6W x 739.1D mm cabinet and 69.5 kg mass make this a serious placement and moving commitment.

Why pick the SVS PB17-Ultra R-Evolution: Independent CEA-2010 testing (Standard Mode) records 113.9 dB at 20 Hz and 119.4 dB through 40-80 Hz. The catch: At 167 lbs with recessed feet that leave little clearance, moving or repositioning this cabinet is a two-person job at minimum.

Buy the SVS PB17-Ultra R-Evolution, since the Monoprice Monolith 13 THX Ultra is discontinued and only worth hunting down used.

Looking for alternatives? See the complete Subwoofers rankings.

Buy the SVS PB17-Ultra R-Evolution at Amazon ($2,599.00) →

Specifications Side By Side

Monoprice Monolith 13 THX Ultra SVS PB17-Ultra R-Evolution
Price$1,700 Discontinued$2,599.00
Ranked#56 of 110 in Large Home Subwoofers (Over 75 lbs)#70 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, bottom
Output SPL at 12.5 Hz94.0 dB90.7 dB
Output SPL at 15 Hz109.1 dB-
Output SPL at 20 Hz115.0 dB113.9 dB
Output SPL at 25 Hz118.0 dB117.5 dB
Output SPL at 31.5 Hz119.5 dB119.4 dB
Output SPL at 40 Hz120.3 dB120.1 dB
Output SPL at 50 Hz120.7 dB119.7 dB
Output SPL at 63 Hz121.4 dB119.0 dB
Output SPL at 80 Hz122.1 dB118.7 dB
Output SPL at 100 Hz122.7 dB119.8 dB
Output SPL at 125 Hz123.8 dB-
CEA-2010-A Average (40-80Hz)121.1 dB119.4 dB
Dimensions23.8”H x 20.3”W x 29.1”D (604.5 x 515.6 x 739.1 mm)20”H x 19.5”W x 21.2”D (508.0 x 495.3 x 538.5 mm)
Weight153.2 lbs (69.5 kg)166.9 lbs (75.7 kg)
Warranty5-
Cabinet Colorblack-
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Drivers13” (330mm) driver17” driver, dual voice coil
InputsXLR (stereo balanced), RCA (stereo/mono)XLR (balanced, LFE/stereo), RCA (LFE/stereo)
XLR InputYesYes
RCA InputYesYes
TRS InputNoNo
Optical InputNoNo
Coaxial InputNoNo
USB InputNoNo
HDMI InputNoNo
AES InputNoNo
Aux InputNoNo
DiscontinuedYes-
Output SPL at 10 Hz-76.7 dB
Output SPL at 16 Hz-107.0 dB
Frequency Response-15-320Hz, ±3dB
Amplifier Power-2800W RMS
Buy the SVS PB17-Ultra R-Evolution at Amazon ($2,599.00) →

How Monoprice Monolith 13 THX Ultra compares with other leading options:

Prices on this page were last checked September 26, 2026 at 11:14 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 13 THX Ultra: $1,700 Discontinued eBay

Monoprice Monolith 13 THX Ultra ranking card

Pros: Independent CEA-2010 testing records 115.0 dB at 20 Hz and 121.1 dB through 40-80 Hz. The ported, front enclosure with 13” (330mm) driver has the headroom for demanding film bass in a large room.

Cons: The 604.5H x 515.6W x 739.1D 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. Discontinued.

Notes: Product # 41496

Full Monoprice Monolith 13 THX Ultra review and specifications →

AES InputNo
Aux InputNo
CEA-2010-A Average (40-80Hz)121.1 dB
Cabinet Colorblack
Coaxial InputNo
CountryUnited States
Dimensions23.8”H x 20.3”W x 29.1”D (604.5 x 515.6 x 739.1 mm)
DiscontinuedYes
Drivers13” (330mm) driver
Enclosureported, front
HDMI InputNo
InputsXLR (stereo balanced), RCA (stereo/mono)
Measurement SourceAudioholics
Optical InputNo
Output SPL at 12.5 Hz94.0 dB
Output SPL at 15 Hz109.1 dB
Output SPL at 20 Hz115.0 dB
Output SPL at 25 Hz118.0 dB
Output SPL at 31.5 Hz119.5 dB
Output SPL at 40 Hz120.3 dB
Output SPL at 50 Hz120.7 dB
Output SPL at 63 Hz121.4 dB
Output SPL at 80 Hz122.1 dB
Output SPL at 100 Hz122.7 dB
Output SPL at 125 Hz123.8 dB
RCA InputYes
TRS InputNo
USB InputNo
Warranty5
Weight153.2 lbs (69.5 kg)
XLR InputYes
Search eBay for Monoprice Monolith 13 THX Ultra →

SVS PB17-Ultra R-Evolution: $2,599.00 Amazon eBay

SVS PB17-Ultra R-Evolution ranking card

Older models: the SVS PB16-Ultra (rated 4.2/5) and the SVS PB13-Ultra (rated 4.1/5).

Pros: Independent CEA-2010 testing (Standard Mode) records 113.9 dB at 20 Hz and 119.4 dB through 40-80 Hz. Triple 4” ports and a dual voice coil 17” driver deliver earth-shaking output with a +/-3dB window down to 12Hz in Extended Mode.

Cons: At 167 lbs with recessed feet that leave little clearance, moving or repositioning this cabinet is a two-person job at minimum.

Full SVS PB17-Ultra R-Evolution review and specifications →

AES InputNo
Amplifier Power2800W RMS
Aux InputNo
CEA-2010-A Average (40-80Hz)119.4 dB
Coaxial InputNo
CountryUnited States
Dimensions20”H x 19.5”W x 21.2”D (508.0 x 495.3 x 538.5 mm)
Drivers17” driver, dual voice coil
Enclosureported, bottom
Frequency Response15-320Hz, ±3dB
HDMI InputNo
InputsXLR (balanced, LFE/stereo), RCA (LFE/stereo)
Measurement SourceAudioholics
Optical InputNo
Output SPL at 10 Hz76.7 dB
Output SPL at 12.5 Hz90.7 dB
Output SPL at 16 Hz107.0 dB
Output SPL at 20 Hz113.9 dB
Output SPL at 25 Hz117.5 dB
Output SPL at 31.5 Hz119.4 dB
Output SPL at 40 Hz120.1 dB
Output SPL at 50 Hz119.7 dB
Output SPL at 63 Hz119.0 dB
Output SPL at 80 Hz118.7 dB
Output SPL at 100 Hz119.8 dB
RCA InputYes
TRS InputNo
USB InputNo
Weight166.9 lbs (75.7 kg)
XLR InputYes
Check current price at Amazon ($2,599.00) →Search eBay for SVS PB17-Ultra R-Evolution →