Quam C10X/BU/WS/VC 8" Speaker Studded Baffle 5W-25/70V w/VCThe C10X/BU/WS/VC by Quam is a complete loudspeaker assembly with an 8" O.D., full range loudspeaker, 5 watt-25/70.7V pigtail transformer, 22 gauge steel stud mount baffle, and volume control. Baffle finish is a white baked epoxy hybrid. Intended use is ceiling mounted in an indoor environment downward facing for signal tones, voice, and music. Made in Chicago, USA.
Specifications: • 25/70.7V transformer: 5, 2.5, 1.25, 0.63, 0.31 watt • Baffle: Stud mount • Average sensitivity: 95 dB 1W/1m • Power rating: 20 watts RMS • Max. system output: 102 dB SPL, 5W/1m • Magnet type: weight: BeFe ceramic, 10 oz. nominal • Frequency response: 60 Hz - 17 kHz • Nominal coverage angle: 90° included angle, -6 dB/ 2 kHz, half space • Audio connection: 7" long, color-coded tinned wires, pre-cut.
Constant Voltage (70-Volt) Audio Systems
Audio distribution systems, especially those commonly used in department stores, warehouses, restaurants, etc., require that many loudspeakers be driven from a single audio amplifier over long runs of speaker wire. The "constant voltage" or "high impedance distribution" audio systems can be complex to understand at first, however, provides many advantages. Learn how to design your own 70-volt or 25-volt loudspeaker system.
Quam C10X/BU/WS/VC Specifications Sheet 
California Prop 65