Four Channel Receiver (1972-74)
Tuning range: FM, MW
Power output: 50W/ch into 8Ω (quadraphonic)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.5%
Damping factor: 30
Input sensitivity: 2.5mV (mic), 2mV (MM), 200mV (DIN), 200mV (line)
Signal to noise ratio: 70dB (mic), 70dB (MM), 80dB (DIN), 80dB (line)
Output: 200mV (line), 40mV (DIN)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 534 x 162 x 360mm
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Reviewed Sep 02nd, 2015 by almabes
One of the monster Kenwood receivers of the quadraphonic era. These things weigh a ton, and are built like tanks. Unlike the smaller amps, switching to 2CH does not internally bridge the front and rear amplifiers like the 5340, 6340 and 7340 do. But with 50W RMS per channel into 8 ohms you can get some serious tinnitus with decently efficient speakers.
The two phono inputs have 100K impedance, which is to help the cartridge output the ultrasonic carrier signal into the internal KCD-2 CD-4 demodulator. If you have the opportunity to get ahold of a decent example of a KR-9940, you won't be disappointed. The MSRP was ~$950 back in 1975, and it still is worth every penny. Not as flashy as a Marantz 4100, but with the extra money you save buy a Tektronix scope and hook it to one of the recording outputs for the light show.