I have a couple of 5534 op amps on order so it will be a couple weeks before I can change them out. Since the amp is for sub duties and will be bridged, I may just leave the originals installed. When bridged, offset is ~4mV.
I went ahead and ordered a few mpsw42/92 to use a predrivers. Looking at the circuit board, which pair of mpsu07/57 are the pre and which are the drivers?
http://bcae1.com/temp/orion01.swf
Right-click to zoom in. The resistor values may be different.
http://bcae1.com/temp/driversubs01.jpg
These were used for testing.
Right-click to zoom in. The resistor values may be different.
http://bcae1.com/temp/driversubs01.jpg
These were used for testing.
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