Proficient Audio C621 6.5-inch Poly Ceiling Speakers deliver smooth, detailed in-ceiling audio with a durable polypropylene woofer and pivoting silk-dome tweeter designed for balanced performance from deep bass through crisp highs. With 91dB sensitivity, 100-watt power handling, and an easy-to-drive 8-ohm design, the C621 provides impressive output for both dedicated listening spaces and whole-home audio systems.

• 6.5-Inch Polypropylene Woofer — Produces solid, controlled low-frequency response down to 45Hz while maintaining clean and balanced midrange performance.
• Pivoting Silk-Dome Tweeter — A 1-inch pivoting tweeter delivers smooth, detailed high frequencies and lets you direct the treble toward the listening area.
• Efficient High-Output Design — 91dB sensitivity allows the speaker to produce substantial volume from relatively low-powered amplifiers, including compact 10-watt models.
• 100-Watt Power Handling — Supports up to 100 watts with a 45Hz–20kHz frequency response and 8-ohm impedance for flexible amplifier compatibility.
• Streamlined In-Ceiling Installation — Features a 9-1/4-inch diameter, 3-5/8-inch depth, and 8-1/4-inch ceiling cutout, plus thin-bezel grilles secured with Neo Magnets and a sturdy dogleg mounting system.

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