Anyone know for sure what the output level is from a Series I or II power supply audio output? Is it +4 line level? Is it hot enough to drive a power amp without an additional preamp? For example; Instrument > 5 pin cable > power supply > pair of McIntosh MC60's.

A Series I/II____ CAN  drive a power amp !    
 
+4dBu =1.23 volts RMS

John ,I have done it as per your post  ( i used  a Crest VS900)  
 
Jimmy J  gave me the idea ! _____________
 
I set my gains a little higher and got really good results

Cool, thanks!