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Kenwood L-09M

Monophonic DC Power Amplifier (1977-78)

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Kenwood L-09M


Power output: 300W into 8Ω (mono)

Frequency response: 5Hz to 50kHz

Total harmonic distortion: 0.02%

Damping factor: 200

Input sensitivity: 1V

Signal to noise ratio: 120dB

Speaker load impedance: 4Ω to 16Ω

Dimensions: 480 x 154 x 409.5mm

Weight: 21.4kg


service manual  English - diamo

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Reviewed Nov 09th, 2014 by blackrifle

Pair purchased new in 1983. Other than annually blowing out dust bunnies and cleaning fan no other PM performed. After 31 years pulled from rack, PM'd and stress-tested by ethical and respected A/V service specialist using MTE with valid calibration tags.
Two cold-solder joints on input PCB were found and reflowed with MultiCore 3.5% silver solder (F'-RHoS!). Hitachi beer can electrolytics tested in-spec so were not replaced.
Using Audio Precision APX-555, Report of Test shows 410W and 422W respectively into 8 Ohms resistive, 20Hz-20KHz to distortion spec of 0.020%. First time I ever heard fan(s) at full speed. Quite amazed and very pleased.



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