SVS PB17-Ultra R-Evolution vs Definitive Technology Descend DN15

Last updated: September 25, 2026

Short answer: the SVS PB17-Ultra R-Evolution. It ranks #70 of 110 subwoofers by sound quality, rated 4.1/5, at $2,599. The Definitive Technology Descend DN15 ranks #99, rated 3.7/5, at $1,999, $600 cheaper, a saving that is not big enough to make up the sound-quality gap.

SVS PB17-Ultra R-Evolution vs Definitive Technology Descend DN15

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

Why pick the Definitive Technology Descend DN15: Independent CEA-2010 testing records 103.9 dB at 20 Hz and 112.9 dB through 40-80 Hz. The catch: Output tops out lower than other large subwoofers in this price range, and there’s no XLR input.

Buy the SVS PB17-Ultra R-Evolution. It is rated higher for sound quality, and saving $600 with the Definitive Technology Descend DN15 does not make up for the sound-quality gap.

Looking for alternatives? See the complete Subwoofers rankings.

Buy the SVS PB17-Ultra R-Evolution at Amazon ($2,599.00) →Buy the Definitive Technology Descend DN15 at Amazon ($1,999.00) →

Specifications Side By Side

SVS PB17-Ultra R-Evolution Definitive Technology Descend DN15
Price$2,599.00$1,999.00
Ranked#70 of 110 in Large Home Subwoofers (Over 75 lbs)#99 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, bottomsealed
Output SPL at 10 Hz76.7 dB-
Output SPL at 12.5 Hz90.7 dB83.2 dB
Output SPL at 16 Hz107.0 dB97.4 dB
Output SPL at 20 Hz113.9 dB103.9 dB
Output SPL at 25 Hz117.5 dB107.3 dB
Output SPL at 31.5 Hz119.4 dB110.9 dB
Output SPL at 40 Hz120.1 dB113.6 dB
Output SPL at 50 Hz119.7 dB113.5 dB
Output SPL at 63 Hz119.0 dB112.8 dB
Output SPL at 80 Hz118.7 dB111.6 dB
Output SPL at 100 Hz119.8 dB111.0 dB
CEA-2010-A Average (40-80Hz)119.4 dB112.9 dB
Dimensions20”H x 19.5”W x 21.2”D (508.0 x 495.3 x 538.5 mm)23.4”H x 24.1”W x 24.9”D (595.4 x 613.4 x 632.7 mm)
Weight166.9 lbs (75.7 kg)114.6 lbs (52.0 kg)
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Frequency Response15-320Hz, ±3dB20-150Hz, ±3dB
Amplifier Power2800W RMS500W RMS / 1500W peak
Drivers17” driver, dual voice coil15” driver + 2x 15” passive radiators
InputsXLR (balanced, LFE/stereo), RCA (LFE/stereo)-
XLR InputYes-
RCA InputYes-
TRS InputNo-
Optical InputNo-
Coaxial InputNo-
USB InputNo-
HDMI InputNo-
AES InputNo-
Aux InputNo-
Output SPL at 125 Hz-110.6 dB
Buy the SVS PB17-Ultra R-Evolution at Amazon ($2,599.00) →Buy the Definitive Technology Descend DN15 at Amazon ($1,999.00) →

How SVS PB17-Ultra R-Evolution 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

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 →

Definitive Technology Descend DN15: $1,999.00 Amazon eBay

Definitive Technology Descend DN15 ranking card

Pros: Independent CEA-2010 testing records 103.9 dB at 20 Hz and 112.9 dB through 40-80 Hz. The sealed enclosure pairs a 15” long-throw woofer with dual 15” passive radiators for very low distortion and true 20Hz extension.

Cons: Output tops out lower than other large subwoofers in this price range, and there’s no XLR input.

Full Definitive Technology Descend DN15 review and specifications →

Amplifier Power500W RMS / 1500W peak
CEA-2010-A Average (40-80Hz)112.9 dB
CountryUnited States
Dimensions23.4”H x 24.1”W x 24.9”D (595.4 x 613.4 x 632.7 mm)
Drivers15” driver + 2x 15” passive radiators
Enclosuresealed
Frequency Response20-150Hz, ±3dB
Measurement SourceAudioholics
Output SPL at 12.5 Hz83.2 dB
Output SPL at 16 Hz97.4 dB
Output SPL at 20 Hz103.9 dB
Output SPL at 25 Hz107.3 dB
Output SPL at 31.5 Hz110.9 dB
Output SPL at 40 Hz113.6 dB
Output SPL at 50 Hz113.5 dB
Output SPL at 63 Hz112.8 dB
Output SPL at 80 Hz111.6 dB
Output SPL at 100 Hz111.0 dB
Output SPL at 125 Hz110.6 dB
Weight114.6 lbs (52.0 kg)
Check current price at Amazon ($1,999.00) →Search eBay for Definitive Technology Descend DN15 →