RP-400M Bookshelf Speaker
The RP-400M bookshelf speakers offer maximum versatility without sacrificing performance from a small, yet elegant audio solution. Designed as main speakers for a compact living space or surround sound to support a Reference Premiere speaker system, the RP-400M bookshelf speakers are the />
Hybrid Tractrix Horn Technology
Klipsch proprietary Tractrix horn-loaded technology ensures high-frequency energy of the RP-400M bookshelf speakers are aimed directly at the listener and reduces unwanted, artificial reverb caused by indirect sound bouncing off walls - meaning you experience the most clear, detailed, lifelike sound possible.
Horn Anatomy
Klipsch Reference Premiere series speakers feature a compressed molded silicon face thats matted to the 90x90 Tractrix horn to reduces horn resonance for a smoother frequency response. Klipsch computer modeled phase plugs acts as a mechanical filter to further ensure a smooth, flat frequency response while protecting the tweeter from damage.

All-New Vented Tweeter
A vented tweeter design reduces standing waves behind the tweeter diaphragm for a smoother high frequency reproduction.
The titanium tweeter diaphragm's light weight yet rigid composition exceeds the performance of aluminum, polymer or silk tweeters.
Klipsch award-winning Linear Travel Suspension technology leverages a piston motion of the titanium diaphragm that lowers distortion and delivers real-to-life sound.
A ceramic magnet housing provides premium performance, Klipsch Reference Premiere tweeters set the standard in acoustic reproduction.

Cerametallic Woofers
Klipsch Proprietary Cerametallic woofers are the RP-400M bookshelf speakers signature statement for both sound and aesthetics. This extremely light, rigid materials holds its shape while being able to deliver lower frequencies with maximum efficiency.
Woofer Anatomy
Klipsch Cerametallic cones are matted to a dual-layer, copper-wound voice coil for exceptional conductivity.
Reference Premiere woofers are housed in a non-resonating, stamped-steel basket that’s secured to a large magnet motor for exceptional efficiency and low distortion, and matched to our horn-loaded tweeters for optimal acoustic execution.

Rear Tractrix Port
The rear Tractrix port of the R-400M bookshelf speakers is perfectly matched to the cabinet and woofers, creating />
Specifications of KLIPSCH RP 400M
Frequency Response 52Hz - 25kHz
Sensitivity 93dB @2.83V / 1m
Power Handling (Cont/Peak) 50W / 200W 
Nominal Impedance 8 Ohm Compatible
Crossover Frequency 1500Hz
High Frequency Driver 
1” Titanium LTS Vented Tweeter with Hybrid
Cross-Section Tractrix Horn
Low Frequency Driver 4” Cerametallic Cone Woofer
Enclosure Material MDF
Enclosure Type Bass Reflex via rear-firing Tractrix Port
Inputs Single Binding Posts
Height 11.73” (29.8 cm)
Width 5.67” (14.4 cm)
Depth 7.50” (19.1 cm)
Weight 9 lb (4.1 kg)
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