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Rotel RA-840

Stereo integrated amplifier

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Rotel RA-840

Specifications

  • Power output: 40 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.03%

    Damping factor: 80

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

    Signal to noise ratio: 78dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 94 x 299mm

    Weight: 6.2kg

  • Power output: 40 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.03%

    Damping factor: 30

    Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 75dB (MC), 78dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 319mm

    Weight: 7.7kg

  • Power output: 40 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.03%

    Damping factor: 30

    Input sensitivity: 0.3mV (MC), 3mV (MM), 220mV (line)

    Signal to noise ratio: 75dB (MC), 78dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 319mm

    Weight: 7.7kg

  • Power output: 50 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 40kHz

    Total harmonic distortion: 0.03%

    Damping factor: 30

    Input sensitivity: 0.31mV (MC), 3.6mV (MM), 240mV (line)

    Signal to noise ratio: 75dB (MC), 78dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 430 x 66 x 319mm

    Weight: 7.7kg

  • Power output: 50 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 100kHz

    Total harmonic distortion: 0.3%

    Damping factor: 100

    Input sensitivity: 0.25mV (MC), 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 70dB (MC), 80dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 444 x 86 x 346mm

    Weight: 7.2kg

  • Power output: 50 watts per channel into 8Ω (stereo)

    Frequency response: 10Hz to 100kHz

    Total harmonic distortion: 0.3%

    Damping factor: 100

    Input sensitivity: 0.25mV (MC), 2.5mV (MM), 150mV (line)

    Signal to noise ratio: 70dB (MC), 80dB (MM), 95dB (line)

    Speaker load impedance: 4Ω to 16Ω

    Dimensions: 444 x 86 x 346mm

    Weight: 7.2kg

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Comments

re: RA-840BX4

Hello,

I need the three rotary switches for the RA-840BX4,
someone knows where can I find them?
I think parts numbers are:
SH30000420
SH30000407
SH30000419

Thanks,
Sorin

re: RA-840BX4

2 of mine are not good anymore also. I had it repaired professionally a few years ago and they said they couldn't find any. Let us know if you find some! My plan was to remove the switches and hard wire the selection.

Yan

re: RA-840

Thanks to your service manual I've just managed to repair a colleague's Rotel RA-840B (had no positive-going signal on one channel). Also lined up the quiescent current on both channels and now it sounds really rather super. Very grateful for the help.

Makes me wonder what became of my old RA-810 that I lent to a friend 20 years ago...

This website is not affiliated with or sponsored by Rotel. To purchase RA-840/RA-840BX3 spares or accessories, please contact the company via their website or visit an authorised retailer.