To simplify things, just check the manual volume settings of the integrated amp before turning it on. There are other ways of "controlling" the volume when turned on like adding a separate potentiometer in the input. However it would only complicate things further. And even if you add a separate potentiometer, you will still have to check the manual volume setting of the integrated amp. Lalo lang dadami ang intindihin. It's the TS din naman who will power up the amp so most likely manual din ang pag-turn on ng power niyan. So before you turn it on, a simple check on the volume control, or to simplify it even further, before yoou power up your amp, just turn the volume knob all the way to zero.