AHB2/Sansui Receiver Pre-out Sound without using volume pot

Just to be clear you have removed the U jumper between the pre-out and main-in and have each output Y split to feed the amp and sub for each channel? 

What happens when the AHB2 is on and zero volume?  Any sound from the DAC? 

If so, there is some bleed through the volume pot because the DAC output voltage is high.  Not a huge deal.  

I assume that if you turn the Sansui off, the subs quiet down?  

Yes this is exactly it!

AHB2 not outputting anything at zero volume, but for some reason the sub amps are getting the music signal and amplifying it before the AHB2 is. You're right, no big deal but wondering if there is a way to easily fix.

Is the subwoofer playing musical beats and notes or is it a steady drone?  

avanti, the subs are both playing the lows from the music signal when the sansui volume control is fully on zero...the same signal that's going to the benchmark amplifier.

Are you streaming as a source?

totem, yes. dac rca out to the aux. input on the receiver.