hi pookie.
tube rolling is just trying out different brands & types of tubes.
the glow you spoke of is normal & after the tubes break in they will settle down.
there isnt a optimum setting for your gain controls but you can use them to your benifit,i set my gain to where my max listening volume is at 100% of the volume adjustment on the preamp.
you cant hurt your amps by running the gain any old way you like so just have fun & enjoy your new gear,the new class of mac amps are amazing & i get a ton of enjoyment out of mine too.
just out of curiosity what preamp are you going to run with the 2 mc 275's & whats the rest of your rig.
mike.
tube rolling is just trying out different brands & types of tubes.
the glow you spoke of is normal & after the tubes break in they will settle down.
there isnt a optimum setting for your gain controls but you can use them to your benifit,i set my gain to where my max listening volume is at 100% of the volume adjustment on the preamp.
you cant hurt your amps by running the gain any old way you like so just have fun & enjoy your new gear,the new class of mac amps are amazing & i get a ton of enjoyment out of mine too.
just out of curiosity what preamp are you going to run with the 2 mc 275's & whats the rest of your rig.
mike.