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About the Monitor 4
The Polk Audio Monitor 4 is a classic bookshelf speaker produced between 1982 and 1985. It is a 2-way, 2-driver loudspeaker system with a 1-inch SL1500 dome tweeter and a 6.5-inch midrange woofer. The speaker cabinet measures approximately 14.5 inches high, 8.5 inches wide, and 7.5 inches deep, weighing about 24 pounds per pair. It has an impedance of 8 ohms and a recommended amplifier power range of 20 to 100 watts per channel. The frequency response spans from 35Hz to 25kHz, with a sensitivity of 91 dB, making it suitable for small to medium room audio setups. The Monitor 4 series is known for its clear mids and warm highs, with a unique series crossover design that keeps drivers in phase. It was originally
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