CVS 4 s a coaxial two way speaker with switchable control to hook up to a standard amplifier & 6 ohms, or to a 70volt / 100volt system These are in excellent condition and have been tested and sound very good. Surrounds are rubber and perfect. I have more of these, so if you want additional speakers see my other auctions Each speaker can measures 8.5” across the face 7” inner opening ( the hole it fits into) 9” tall front to rear Specs: The CVS 4 is a compact 160-Watt ( 80 Wpc) ceiling loudspeaker engineered to provide superb audio performance in both background and foreground music sound systems. Ideally suited for a wide variety of applications, from restaurants and hotels to houses of worship and businesses of all types, the CVS 4 offers the power handling, wide frequency response and low distortion more typically found in a studio reference monitor than a ceiling loudspeaker. The resulting sound is warm, with a nuanced and pristine clarity that envelopes the listener – without intruding. Exceptional Sound and Reliability Exceptional Sound and Reliability The design comprises a 100 mm (4.00) mid bass driver with a coaxially mounted 19 mm (0.75) high frequency section mounted in a vented, injection moulded, paintable front baffle manufactured from UV/weather resistant UL94V-0 ABS material. The mineral loaded polypropylene cone material and nitrile rubber surround enhance durability and long-term reliability. This compact unit is specifically designed for applications requiring the combination of excellent sonic quality for music and speech reinforcement and exceptional reliability. Comprehensive Installation Package Comprehensive Installation Package Supplied with an integral zinc-plated steel back can, with recessed termination box, the CVS 4 satisfies the vast majority of installation application requirements. The removable locking connector has screw terminals for secure wire termination and “loop through” facility. Strain relief is provided by a clamping mechanism for use with plenum rated cable or conduit. Security toggle clamps make for quick and easy installation, while two tile support rails and one C-ring are also included in the package. A plaster (mud) ring is available as an optional accessory. Specification Show less System Frequency response (-3 dB)1 85 Hz - 19 kHz Frequency response (-10 dB)1 77 Hz - 22 kHz System Sensitivity (1 W @ 1 m)2 87 dB (1 W = 2.45 V for 6 Ohms) Nominal Coverage Angle 90 degrees conical Coverage Angle (1 kHz to 6 kHz) 102 degrees Directivity Factor (Q) 5.6 averaged 1 kHz to 6 kHz Directivity Index (DI) 7.1 averaged 1 kHz to 6 kHz Rated Maximum SPL 103 dB (average) 109 dB (peak) Power Handling3 Average: 40 W Programme: 80 W Peak: 160 W Recommended Amplifier Power 80 W @ 6 Ohms Nominal Impedance 6 Ohms Transformer Taps (via front rotary switch) 70 V: 30 W / 15 W / 7.5 W / 3.75 W / OFF & low impedance operation 100 V: 30 W / 15 W / 7.5 W / OFF & low impedance operation Transducers Low Frequency 100 mm (4.00) mineral loaded cone material High Frequency 19 mm (0.75