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View Full Version : Dr. Z 6545 Presence Control

benttop
06-03-2006, 04:48 PM
I would like to add some means of dialing in some presence on this amp. Before I spend a pile of time reverse engineering the schematic, has anyone already done such? Any advice about the best way to go about adding a presence control to this amp? Any help is appreciated. :help:
jaydawg
06-05-2006, 06:20 PM
as far as I know, the presence control is a variable feedback look. So just add a NFB and use a pot in place of the resistor.
benttop
06-05-2006, 08:42 PM
as far as I know, the presence control is a variable feedback look. So just add a NFB and use a pot in place of the resistor.

I'll have a look at that. Not sure if there is NFB already on that amp or not (probably is). A good place to try some experiments I suppose - still have to reverse engineer the schematic from the chassis...