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Item#: 9SIA1J70ZW2197

Klipsch Reference RB-51 II Bookshelf Speaker Pair

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The small, affordable Reference Series bookshelf speaker RB-51 II doesn’t skimp on sound. With its dynamic, accurate, non-fatiguing sound reproduction, highly efficient design and visual appeal, this speaker is simply irresistible.

The RB-51 II is loaded with Klipsch’s proprietary Tractrix Horn technology which produces a unique combination of precision, clarity and effortless power. Finished in a beautiful black ash wood-grain vinyl veneer, the RB-51 II is guaranteed to complement any décor. Keyhole bracket and dual 1/4"-20 threaded inserts are included for flexible placement.

  • newegg Tractrix Horn Technology Klipsch’s Tractrix Horn technology leads to lifelike sound, more output using less energy, improved reliability, reduced distortion and a large soundstage with well-defined imaging.
  • newegg Cerametallic Woofer Cones Klipsch’s RB-51 II features light, yet rigid Cerametallic woofer cones with specially treated aluminum to help better dampen and prevent distortion.
  • newegg Titanium Tweeter with Linear Travel Suspension This trickle-down technology from Klipsch’s 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.
  • newegg Enhanced Crossover Frequency A crossover frequency at 1500Hz offers smooth on-axis and off-axis integration for enhanced sound performance.

Learn more about the Klipsch RB-51 II


RB-51 II


Bookshelf Speakers
Sold As
Driver Units
High Frequency Drivers: 1" (2.54cm) Titanium diaphragm compression driver mated to 90º x 60º square Tractrix Horn

Low Frequency Drivers: 5.25" (13.3cm) Cerametallic cone woofer
Power Rating
Frequency Response
50Hz-24KHz +/- 3dB
Nominal Impedance
8 ohms compatible
92dB @ 2.83V / 1m
Remote Control
Dimensions & Weight
11.4" H x 6.5" W x 10.75" D / 20.9 lbs. (9.5 kg) per pair
Wood-grain vinyl cabinet


Smart balance of performance, size and value

Fills medium-sized rooms with dynamic sound reproduction

Equally impressive with music and movies

Highly efficient design produces more output using less energy

Accurate, non-fatiguing sound provides hours of listening pleasure

Plays louder with less distortion than the competition

Enhanced 1" titanium horn-loaded tweeter, 5.25" high-output woofer

Keyhole bracket for easy wall mounting

Dual threaded inserts for use with third-party stands

Manufacturer Warranty

5 years limited
5 years limited

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the Klipsch RB-51 II

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  • Jeff H.
  • 5/2/2011 10:08:34 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsLOVE

Pros: These guys are great! I'm not a sound techie but WOW! Makes our el-cheapo A/V system sound fantastic...true story. Got them free with another purchase.

Cons: Nothing

0 out of 1 people found this review helpful. Did you? Yes No

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Home > 
Electronics > 
Home Audio & Home Theater > 
Home Audio Speakers > 
Klipsch > 
Item#: 9SIA1J70ZW2197
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