RS-8990 Wireless Transmitter/Speakers System with Stereo Sound Field DIY and Aut

RF Transmitter: Transceiver carrier frequency: 900/400 MHz; ()Audio Input: 0.3RMS above/auto; Channel separation: 48dB Max.; Input Impedance: 25 KOhm ()Channel balance: +/-1.5dB; Eff. range: 300 feet above; Power source: AC adapter O/P DC 12V 100mA ()RF Speakers: Stereo auto tracing: several bands; Tuning range: 900/400 MHz RF sensitivity: 30dB min ()Power source: AC adapter (O/P DC 9V 600mAx2), DC battery 1.5V x 6pcs ()Palette surround frequency response: 15-21KHz; Drive unit: 120mm paper speaker ()Maximum output power 12W per channel; Impedance: 4 Ohm; THD: 0.2%; Image rejection: 70dB+/-5dB ()S/N ratio: 80dB max.; Channel separation: 45dB (+5.-10)dB; Battery life: about 45-60 hours ()

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