Klipsch R-1650-C

The Klipsch R-1650-C is an in-ceiling speaker from the company's Reference Series — a line more commonly associated with home-theater floorstanders and bookshelf models, but here applied to architectural sound. It's a 6.5-inch, two-way design pairing a polymer-cone woofer with a coaxially mounted 1-inch polymer-dome tweeter, the latter meant to spread clean highs across a wide listening area. Klipsch rates it at 91 dB sensitivity with an 8-ohm impedance and a frequency response of 57 Hz to 20 kHz (±3 dB), handling 35 watts RMS (140 watts peak).

Installation details are where the record gets a bit uneven. Most sources agree on a cutout diameter of roughly 8-3/16 to 8.3 inches, with a mounting depth somewhere around 3-3/4 to 4 inches — but figures vary by retailer, and Klipsch's own spec sheet isn't in the archive to settle it. The speaker carries a moisture-resistant design, making it suitable for bathrooms or kitchens, and it's compatible with Klipsch's IK-650-C installation kit and ME-650-C fire-rated enclosure, both sold separately. A 5-year manufacturer warranty applied.

Surviving information on this model is otherwise thin. No production years, original pricing, or formal professional reviews are documented. What exists are brief owner impressions — comments about clean high frequencies, easy installation, and satisfaction when matched with other Klipsch speakers in a surround system. It appears in period listings as a single speaker or in a four-pack of white units, and current asking prices in the secondary market range from roughly $69 to $149 depending on condition and quantity.