kerley Posted May 20, 2009 Share Posted May 20, 2009 Hello. After some feedback from anyone that uses an After 8. Start to get hissing when volume goes past 1 o'clock and gets worse as volume goes up. The hissing stops if I put on full volume and press the extra bass button but I don't like that sound! This is all with the treble turned right down (gain doesn't make much difference to hiss) Do they all do this, am I expecting too much or is there a likely fault? Cheers, Chris. Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted March 23, 2020 Share Posted March 23, 2020 On 20/05/2009 at 21:35, kerley said: Hello. After some feedback from anyone that uses an After 8. Start to get hissing when volume goes past 1 o'clock and gets worse as volume goes up. The hissing stops if I put on full volume and press the extra bass button but I don't like that sound! This is all with the treble turned right down (gain doesn't make much difference to hiss) Do they all do this, am I expecting too much or is there a likely fault? Cheers, Chris. Sorry to ressurect a zombie thread but it is probably quite usual as the TRL072 IC used in the amp is a bit noisy. REpolacing it with a real audio opampo like OPA2134 will probably remove most of the hiss. I am reapiting mine at the moment so will pots here when I have done it and chnaged the Tl072 for an OPA2134. Quote Link to comment Share on other sites More sharing options...
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