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PS 820 WOOFER PASSIVE RADIATOR TWEETER CROSSOVER: IMPEDANCE POWER RATING Specially designed high power 6” bass-mid driver featuring new ultra-damped polyproplene cone, hi-temp voice coil, and 2 lb. magnetic circuit. 8” foam/slate laminate, tuned resonance of 40 hz. Heil air-motion transformer with 3A” X 2V2” pleated teflon diaphragm, 2 lb. 6 oz. magnetic circuit, rise time of 15 micro seconds, and 5.3 to 1 amplifica tion factor. 2 khz, computer designed linear phase type featuring premium components, minimum phase er ror and group delay, and im pedance equalization. 4 ohms, Minimum 5 watts, maximum 100 PS 920 WOOFER PASSIVE RADIATOR TWEETER CROSSOVER: IMPEDANCE POWER RATING Specially designed high power 8” bass-mid driver featuring new ultra-damped polyproplene cone, hi-temp voice coil, and 3 lb. magnetic circuit. 8” foam/slate laminate, tuned resonance of 35 hz. Heil air-motion transformer with %” X 2 Vi” pleated teflon diaphragm, 2 lb. 6 oz. magnetic circuit, rise time of 15 micro seconds, and 5.3 to 1 amplifica tion factor. 2 khz, computer-designed linear phase type featuring premium components, minimum phase er ror and group delay, and im pedance equalization. 4 ohms, ^ Minimum 5 watts, maximum 125 EFFICIENCY PROTECTION FREQUENCY RESPONSE DISPERSION FINISH SIZE WARRANTY watts step music power. 89 db for 1 watt/meter. Thermal overload-sensing breaker, self resetting. Usable range of 42 hz to 23 khz. with typical mid-band accuracy of ±1 db. Horizontal 120 degrees, vertical 40 degrees. Hi-tech black with walnut top cap and bottom accent piece, black removable grill. Approximately 9V2” wide by 9V2” deep by 173/a” high.