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Discussion Starter · #1 ·
can anyone hlep me with an audison lrx 1.400, i need to know what the output mosfets are. i know the p channel is an irf 9640s but in the unit i have here the n channel mosfets are irf 640. i dont think they are the correct ones as someone has replaced them before me and i am also seeing quite a large bias difference between both banks of outputs.

i need someone that has a service manual or is prepared to open their lrx1.400 and give me some details. i can guide them if they are unsure as to how to measure bias voltage and how to remove the clips on the output transistors. its very easy and requires nothing more than a couple of screwdrives and a reasonable multimeter.

thanks
 
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