Klipsch KL-650-THX
The KL-650-THX was Klipsch’s THX Ultra2-certified LCR speaker. It sat in the top-of-the-line home theater lineup next to the KL-525-THX, the KS-525-THX surround, and the KW-120-THX subwoofer. It was a two-way design with dual 6.5" magnetically shielded Cerametallic™ cone woofers and a 1" titanium-dome compression driver. The driver was loaded by a rectangular 90° x 60° Tractrix® horn, and the crossover point was 1,400 Hz. The horn was central to the design. It let the speaker meet THX Ultra2 directivity specifications without the lobing and comb-filtering that plague conventional multiple-tweeter arrays. The enclosure used the same dado-and-rabbet construction as Klipsch’s professional cinema speakers, which kept the cabinet rigid for suspended installations.
Klipsch pitched the KL-650-THX as cinema sound brought home. The design drew on the company’s experience as a major supplier of movie theater sound systems, and it carried the THX Ultra2 seal for home theater performance. It had dual binding posts connected by jumpers, plus high-quality internal wiring.
The record on this model is thin. No production years, original MSRP, or full specification sheet (frequency response, sensitivity, impedance) are documented in available sources. Depth is 318 mm and weight is 17.7 kg. The finish was Galaxy Black. Used pairs and singles do turn up on the secondhand market. At least one DIY-er documented building a replica for roughly $400 against a claimed $3,500 retail value, which suggests the original carried a premium price.
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