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    Bernie Pyra
    CVRS Member

    I am new to the restoration of old tube radios and am working on a 1960’s vintage Marconi stereo radio Chassis 638/645. I have the chassis but not the speakers. I would appreciate any help in determining what type of speaker set up I should use for this radio. I have the schematic for the radio, 2 pages of which are attached. It does not seem to indicate what impedance the speakers should be. It appears to me that there were 4 speakers for this unit, 2 for each channel. The schematic shows one speaker larger than the other and it appears to me that for each channel they are wired in parallel. I am unclear what the other items are that are pictured in the schematic for the speaker layout. Any advice as to how I should set up speakers for this chassis would be appreciated. Thank You.

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