Pete, do you have the Bozak 225 audio cards or the Bozak HB 225 audio cards? From what I understand the HB cards were design by BB & PH in the early 1980s for their custom Bozak HB mixer. They are different from all the standard audio cards because they were designed from the original early broadcast standard cards first used in the 1960s by Bozak. They would be a little flatter sounding than the normal DLA etc mixers and would be why you think it sounds cleaner. That is why I am looking for the DLC with HB audio output cards. Sounds like you may have one of those with the harder to find cards. New caps help refresh the mixers as vinyl junkie stated but the HB cards I am told are broadcast standard and you could possibly hear a different sound that would appear cleaner.
Last edited by Captainjr : 09-03-2012 at 08:09 PM.