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Klipsch Reference Bookshelf Speakers-RB-51 II

Model #: RB-51 II
At a Glance

Klipsch Reference Bookshelf Speakers with our proprietary Tractrix® Horn technology which produces a unique combination of precision, clarity and effortless power

Available in Store Only

Get to know this product.

The RB-51 II speaker offers up no-compromise music and movie performances in a smaller, more affordable bookshelf design. In fact, with its dynamic quality, superior sound and visual appeal, you’ll find this speaker simply irresistible.

Tractrix® Horn technology

  • Every Reference speaker utilizes our Tractrix® Horn technology for lifelike sound, more output using less energy, improved reliability, reduced distortion and a large soundstage with well-defined imaging

Cerametallic woofer cones

  • Our light, yet rigid Cerametallic woofer cones feature specially treated aluminum to help better dampen and prevent distortion

Titanium tweeter

  • Titanium tweeter with linear travel suspension—trickle-down technology from our flagship Palladium Series—provides an open, natural sound, making you feel as if you’re in the studio with the recording artist or on the set of a film

Enhanced crossover

  • Enhanced crossover frequencies offer smoother on-axis and off-axis integration


Connector Type:Single binding posts


Enclosure Type:Bass-reflex via rear-firing port
Tweeter Composition:Titanium
Woofer Composition:Cerametallic™ Cone


Crossover Type:1500Hz


Sensitivity:92dB @ 2.83V / 1m
Speaker Type:Bass Reflex


Color:Black Ash

Misc. Specs

Product Weight20.9000
Impedance8 ohms
Number of Speakers2
Depth (in.)10.7
Height (in.)11.4
Width (in.)6.5
Woofer Size5.25
WarningProposition 65 Warning for California Residents