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Rotel RA-820

Stereo integrated amplifier

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Rotel RA-820

Specifications

  • Power output: 25 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.4%

    Damping factor: 20

    Input sensitivity: 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 75dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 271mm

    Weight: 5.5kg

  • Power output: 30 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.08%

    Damping factor: 180

    Input sensitivity: 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 80dB (MM), 100dB (line)

    Speaker load impedance: 8Ω to 16Ω

    Dimensions: 444 x 86 x 303mm

    Weight: 6kg

    Year: 1987

  • Power output: 30 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.08%

    Damping factor: 180

    Input sensitivity: 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 80dB (MM), 100dB (line)

    Speaker load impedance: 8Ω to 16Ω

    Dimensions: 444 x 86 x 303mm

    Weight: 6kg

    Year: 1989

  • Power output: 25 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.08%

    Damping factor: 25

    Input sensitivity: 3mV (MM), 220mV (line)

    Signal to noise ratio: 75dB (MM), 86dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 271mm

    Weight: 5.5kg

  • Power output: 25 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.08%

    Damping factor: 25

    Input sensitivity: 3mV (MM), 220mV (line)

    Signal to noise ratio: 75dB (MM), 86dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 271mm

    Weight: 5.5kg

  • Power output: 30 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.08%

    Damping factor: 25

    Input sensitivity: 3.75mV (MM), 250mV (line)

    Signal to noise ratio: 75dB (MM), 86dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 271mm

    Weight: 5.5kg

  • Power output: 30 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 100kHz

    Total harmonic distortion: 0.3%

    Damping factor: 100

    Input sensitivity: 0.38mV (MC), 3.8mV (MM), 250mV (line)

    Signal to noise ratio: 70dB (MC), 80dB (MM), 93dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 444 x 86 x 346mm

    Weight: 7kg

  • Power output: 30 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 100kHz

    Total harmonic distortion: 0.3%

    Damping factor: 100

    Input sensitivity: 0.38mV (MC), 3.8mV (MM), 250mV (line)

    Signal to noise ratio: 70dB (MC), 80dB (MM), 93dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 444 x 86 x 346mm

    Weight: 7kg

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Comments

re: RA-820

BEWARE! C905 polarity is wrongly marked on the circuit board, The service manual is correct

re: RA-820b

I've been repairing one of these and noticed that either the service manual or the makings on the circuit board is wrong regarding the polarity of capacitor C417 / C418 The negative being shown toward resistor R421/ R422 on the service manual which I think is correct; and placing them this way has not blown them!

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