
Lt. Bob
Spread the Daf!
But there isn't any line out on the Valve Jr.An attenuator allows you to crank the amp for tube saturation while maitaining a low volume. Basically it acts as a secondary master volume that will not affect tone. Weber adds EQ into some of their attenuators, but I don't think the micro mass has any. Yes you can use the line out and speaker out at the same time. Just make sure to have the attenuator full on if you plan on going line out only, so it acts as a dummy load.
Does the micro mass have one?