Klipsch Synergy Sub10 Powered Subwoofer - Product Review

Klipsch Synergy Sub10
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Introduction to the Klipsch Synergy Sub10

The Klipsch Synergy Sub10 is a large, heavy, unit with a powerful built-in low-frequency amplifier. The driver is down firing but is supplemented by a rear-firing port for added low-frequency extension. Below the rear port are the connections and controls.

The Klipsch Sub10 has adjustments for Phase (which matches the in/out subwoofer driver motion to the satellite speakers), Gain (subwoofer volume level), and Crossover (sets the point at which you want the subwoofer to produce low-frequency sounds, against the ability of the satellite speakers to reproduce low-frequency sounds).

The controls make matching to various satellite speaker types easy. One downside is that if you need to make adjustments, the controls are on the back of the subwoofer panel, and there is no remote control function that allows you adjustments to be made from your listening position.

Features and Specifications

  • Amplifier Type: BASH (Bridged Switching Hybrid).
  • Frequency Response: 28Hz-120Hz +/- 3dB
  • Power Handling (FTC Rated): 200 watts continuous. Short-term peak capability to 420 Watts.
  • Crossover Frequency: Continuously variable from 40Hz-120Hz.
  • The Subwoofer cone is 10-inches (25.4cm) in diameter.
  • The Sub10 is Phase Switchable at 0-180 degrees - used to match the in-out motion of Sub10 to in-out motion of other speakers.
  • Enclosure type: Bass-reflex via rear-firing, 4.125-inch round port, down-firing main Driver.
  • Input connections - Two line level/RCA jacks and two sets of stereo high-level speaker terminals.
  • Auto power on 2 second ON delay; 15 minutes OFF delay.
  • Dimensions - 17-inches (43.2cm) H x 14.0-inches (35.6cm) W x 18.875-inches (47.9cm) D.
  • Weight 37 lbs. (16.8kg)


The Sub10 produced excellent, very deep, tight bass. The Sub10 proved to be an excellent match for the rest of the speakers. DVD soundtracks with LFE effects, such as King Kong, Godzilla (1998), Master and Commander, The Lord of the Rings Trilogy, and U571, the sub10 showed no fatigue or drop-off, producing all LFE effects at full impact.

For music, the Sub10 reproduced clean bass response on several notable bass-notable cuts, such as the famous sliding bass riff on Heart's Magic Man, the Canon Finale on the Eric Kunzel/Telarc recording of the 1812 Overture, and Pink Floyd's Dark Side of the Moon.

The Sub10 mixed very well with the rest of the satellite speakers in test setups, including the Klipsch Quintet III Compact 5-channel Speaker System, and a second system that included a pair of Klipsch B-3's, Klipsch C-2 Center Channel and two JBL Venue Series 5-inch Monitor speakers as rear surrounds.

What I Liked

  • Excellent bass response - tight and clear - not muddled or boomy.
  • Auto On/Off Function
  • Large Power Output
  • Down-Firing Design with Rear Port
  • Good Price Point

What I Didn't Like

  • No onboard provisions for connecting a second subwoofer.
  • No wireless remote control capability.
  • Large Cabinet.

The Bottom Line

The Klipsch Synergy Sub10 Powered Subwoofer is not just a powerful subwoofer. The Sub 10 also delivers a clarity, tightness, and undistorted deep bass response that you find on more expensive subs.

My overall impression of the Klipsch Synergy Sub10 is extremely positive. It is a real five-star winner. However, I would caution those that live in a second-floor apartment, the downstairs neighbors will definitely take notice!

For a more detailed look at the Sub10, check out my Klipsch Synergy Sub10 Photo Gallery.

More Info

NOTE: Although the Synergy Sub10 enjoyed a long run in Klipsch's product line, it has have been replaced by more recent models, which can be viewed on the subwoofer portion of Klipsch's website. It is possible you can still find the Synergy Sub10 through third parties via Amazon.com or additional Auction sites.

Also, if you are interested in other, more current, options, check out my periodically updated Subwoofer List.