Klipsch® R-51M Bookshelf Speaker
Klipsch® R-51M Bookshelf Speaker 0
Klipsch® R-51M Bookshelf Speaker 1
Klipsch® R-51M Bookshelf Speaker 2
Klipsch® R-51M Bookshelf Speaker 3
Klipsch® R-51M Bookshelf Speaker 4

Klipsch® R-51M Bookshelf Speaker

Model #: R-51M
At a Glance
Leveraging a 1" aluminum tweeter matted to our proprietary Tractrix horn-loaded technology - the R-51M bookshelf speaker delivers incredible acoustics to fill your home with loud, crystal-clear sound and robust bass that no ordinary bookshelf speaker can.

Get to know this product.

  • 1" Aluminum LTS tweeters
  • 90x90 Square Tractrix Horns
  • Dual 5.25" Spun-Copper IMG Woofers
  • Bass-Reflex via Rear-Firing Port
  • Strong, Flexible Removable Magnetic Grille
  • Dimensions: 13.3" x 7" x 8.5"

Tractrix® Horn Technology

Klipsch exclusive 90x90º Tractrix® horn technology ensures that the R-51M high frequency energy is aimed at the listener and reduces artificial reverb or filtering caused by indirect sound bouncing off of walls. Using this proprietary focused technology gives you the best clarity, dynamics, and detail from your movies and music.

Linear Travel Suspension Tweeter with Kapton® Suspension

Klipsch exclusive Linear Travel Suspension (LTS) aluminum tweeter minimizes distortion for enhanced, detailed performances. Using Kapton®, an extremely light and rigid material, in the tweeter suspension provides high efficiency and improve resolution and detail. LTS tweeters are a hallmark of Klipsch speakers, making them some of the best speakers in the world.

Spun Copper IMG Woofers

Injection Molded Graphite (IMG) woofer cones are exceptionally light while being extremely rigid – providing remarkable low frequency response, with minimal cone breakup and distortion. When paired with the Tractrix Horn-Loaded LTS Tweeter, it provides speaker efficiency highest in its class.

Sleek Design

Exposed fasteners, low profile magnetic grilles and a scratch-resistant, textured wood grain vinyl give the R-51M bookshelf speakers a polished, modern appearance.

High Quality Cabinet Design

Reinforced MDF construction reduces cabinet vibration for less audible coloration and improved sonic accuracy - giving you the ultimate listening experience that's built to last.



Connector Type:Single Gold Plated Binding Posts


Enclosure Type:Bass-Reflex Via Rear-Firing Ports
Tweeter Composition:Aluminum
Woofer Composition: IMG (Injection Molding Graphite)


Crossover Type:1,660 Hz
Sold As:Pair


Frequency Response62Hz - 21kHz +/- 3dB
Sensitivity93 dB @ 2.83V/1M
Power Handling (Cont/Peak)85W/340W
Nominal Impedance8 ohms Compatible
Crossover Frequency1,660 Hz
High Frequency Driver1” Aluminum LTS tweeter mated to a 90 x 90 square Tractrix® Horn
Low Frequency DriverSingle 5.25” spun-copper IMG woofer
Enclosure MaterialMDF
Enclosure TypeBass-Reflex via rear-firing ports
InputsSingle Gold Plated Binding Posts
Height13.3” (338 mm)
Width7” (178 mm)
Depth8.5” (215 mm)
Weight11 lbs (5 kg)
FinishBlack Textured Wood Grain Vinyl
Included AccessoriesRubber Feet (4)
Built From2018

Misc. Specs

Product Weight (lbs.)11
Color Finish NameBlack
RMS Power Handling (Watts)340
Impedance8 ohms
Number of Speakers1
Speaker TypeBookshelf Speakers
Depth (in.)8.5
Height (in.)13.3
Width (in.)7
WarningProposition 65 Warning for California Residents