• 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.

MingDa MC-3R / icon audio la3 preamp mods


2007-08-05 2:01 pm
Hi I have been making a few modifications to my preamp, which so far sound great.
I started with re-cabling a one pair of the inputs directly to the volume control, bypassing the selector.
Then have removed the dc blocking caps to a pair of the output rca.
I have also used some mundorf .033uf caps in parallel with the existing .33uf input caps.

I currently have replaced the signal valves with some second hand mullards, and am considering changing the Rectifier.

Does anyone have any other ideas/experience for modifications to the preamp for maximise its performance?

Any ideas or pointers greatly appreciated,


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