I tried using tilt bases to angle the tweeters toward the listening area, but the sound remained unimpressive. But in this location, the speakers were too close to the floor (I’m a tall listener). I initially set up the Klipsch RP-600M speakers directly on top of my subwoofers. This level of design effort is unusual for a home-theater speaker but is common for speakers intended for higher-end stereo. I did most of my listening in bi-wire mode. The terminals are jumpered from the factory, but the jumpers can be removed for bi-wiring or for bi-amplification. The rear-firing port is highly unusual in that it, also, is fitted with a Tractix-style horn to better couple the port with the room air. The cabinet seems to be well made and relatively non-resonant. In my opinion, since the cone will be hidden behind the grill, it really shouldn’t matter. The proprietary-to-Klipsch, spun Cerametallic cone itself is finished in a copper color that will polarize the viewer.
The RP-600M’s woofer uses a highly flexible and durable butyl rubber surround and is designed with a dual-layer voice coil.
This design seems to have been uniquely successful in eliminating the coloration that many audiophiles have consistently criticized in all brands of horn-loaded speakers. The horn is a two-piece construction with a copper-colored trim ring between the throat and the Tractrix horn. The tweeter’s phase plug is designed specifically for the new molded silicone Tractrix horn, that dampens horn resonances at high volumes. The tweeter’s “Linear Travel Suspension” is claimed to enhance the pistonic motion of the diaphragm at higher frequencies while also reducing distortion. Not only does the magnet of the tweeter vent the pole-piece, but the dome itself is made of ultra-light titanium. The tweeter of the RP-600M shows signs of careful engineering. Without them, the tweeters can sound slightly bright. The magnetic grilles fit perfectly, and the speakers have obviously been voiced for use with their grilles attached. The RPs are a small-ish ported box loudspeaker that show signs of better-than-average design and engineering.
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