The RP-600M II bookshelf speakers offer incredible performance for their price. They provide detailed mids and highs and can dish out surprisingly articulate bass for a bookshelf speaker. The company reworked the woofer and tweeter to give them a leg up on the previous generation. These versatile speakers serve many roles well. You can use a pair of them as your main speakers in a two-channel stereo setup. Or you can use them as front- or surround-channel speakers in a home theater system. No matter what they're doing, they'll serve up detailed sound. The 1" LTS (Linear Travel Suspension) tweeter features a vented housing to reduce standing waves that can compromise sound quality. The hallmark Tractrix® horn it's housed in has a widened mouth for better soundstaging and directivity. That means a wider "sweet spot" overall and better imaging within that sweet spot. The horn also sports a soft silicone face and a unique phase plug to keep the highs smooth and non-fatiguing. Metallic drivers aren't anything new for Klipsch speakers, but the company has made significant improvements to the motor structures behind the 600M II's cone. Each speaker's 6-1/2" woofer uses a 70% larger voice coil for greater control, speed, and accuracy. The woofers also have new aluminum shorting rings that help reduce distortion and let the drivers handle some extra power. The cabinets have a rear-firing Tractrix port that helps deepen each speaker's bass response. The port's horn shape promotes more efficient airflow in and out of the cabinet, minimizing port noise and low-frequency distortion. Since these speakers use a ported cabinet, you don't want to place them up against a wall. Instead, I recommend giving the speakers some "breathing room" by pulling them away from your wall a little. Their bass response will thank you.