• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Marantz 7 Preamp

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many clones of the M7 are coming out of china and hong kong,
they come in various kits and assembled units too.....
in one clone, the 6au6 and the 6v6 pentodes were used, triode wired of course...
but topology is M7 definitely.....
i made a clone using the 13fm7 dual dissimilar triode.....
and with global negative feedback sounded pretty nice....

having read John Broskie, i tried his CCDA line amps,
and they too sounded nice....
 
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