Is there a way to lock/set the volume at a certain level (higher than the pre-set 50) without turning it up every time when it is turned on? And if it is, can I lock it at 100? In another word, if I turn to 100, would it be ok, or it should be between 50 -100? The reason is I do not want to crank up my tube integrated amplifier if the PWD MK II is set at 50. Thank you in advance for your advice.