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Hafler DH-500 Bias Procedure

audio_exp

audio_exp

Member
What is the bias procedure for an early stock DH-500? (Earlier model without DC offset pot.)
-How many mV for correct bias?
-What fuse is the test point?

I don’t see a final bias setup section in the factory manual like other Hafler models?

John
 
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I assume you can pull a fuse from each channel and insert a milli-ammeter (DMM) and measure the bias current that way
Set it for roughly 75-100mA per output device for which there are 3 pairs so that would be 225-300mA
 
I'm running mine at 350 mA per info I got on AK here when I refurb'd it. It sounds fabulous. I have a thread on my DH 500 reburb on here, you should be able to find if need be. Others more knowledgeable than me will probably chime in. Mike
 
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