C640 Ceiling Speaker

Bass and treble boost switches give the C640 an extra kick in the lows or highs—or both! A stiff graphite-cone woofer plays deep bass notes with very low distortion, and it delivers a super-smooth midrange, too. A top-quality aluminum-dome tweeter produces clear, extended treble response.

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The ceiling speaker with extra kick

The C640's grille conceals tone switches that let you boost the bass and/or treble by 3 decibels. With the flick of a switch, you can kick up the lows or highs to suit your taste. No matter how you set the switches, you'll love the C640's sound, thanks to its low-distortion graphite woofer and aluminum tweeter.

No subwoofer needed here, because the C640 plays down to 32 Hz. That's 9 Hz below the deepest note on an upright bass! The 92 dB sensitivity means the C640 needs only about one-third as much power as a typical speaker, so you can get satisfying sound even with very low-powered amplifiers. A sturdy dogleg mounting system makes it easy to install.


• 6½" Graphite Woofers • Impedance: 8Ω
• 1" Pivoting Aluminum Dome Tweeters • Sensitivity: 92dB 1W/1m
• +3db Bass & Treble Contour Switches • Diameter x Depth: 9¼" x 3-5/8"
• Power Handling: 125 Watts • Ceiling Cut Out: 8¼"
• Frequency Response: 32Hz - 22kHz