Well, I am currently using the SMSL SU8 with a Marantz 1060.
To my taste, I have an installation using "directly" the amp section of the 1060, avoiding the preamp of the 1060.
In fact, I use the XLR output of the SMSL... And a little box named Little Bear from Amazon. It's a low cost passive preamp.
Using the box, I can either or
- use the SMSL SU8 XLR output
- use the RCA 1060 preamp output (on the RCA)
Selection is done by a button in the front side...
And then use the RCA output from the Little Bear to the 1060 Amp Input.
The Max volume question seems a false problem to me. I always switch on the DAC first and check the volume and then power on the Amp.
Max volume on the SU8 is only set after a reset...
Concerning the inout stage of the amp, if I want to be 0.0dB on the SMSL SU8, no problem, I can use the pot on the Little Bear :
I also would like to add... I know we are on audio SCIENCE review... Results are superb to my taste, and the near 50 year old Marantz is surprising good on the amp section. Preamp should by sorted (I think a recap and some transistors) but I use it sometimes for the vinyles.