
felineguitars
Member
Whoohoo- my M4 arrived before the weekend and I have finally gotten it in my rack
Pics below - the little amp to the left is my custom built single ended power amp - class A, 10w, running a 6CA7 power tube
A quick question
The m4 preamp chassis says it should have a 12AT7 and a 12AX7 but mine came with two 12AX7s
Is this wrong ?
Should I change one of the 12AX7s for the lower gain 12AT7
Pics below - the little amp to the left is my custom built single ended power amp - class A, 10w, running a 6CA7 power tube


A quick question
The m4 preamp chassis says it should have a 12AT7 and a 12AX7 but mine came with two 12AX7s
Is this wrong ?
Should I change one of the 12AX7s for the lower gain 12AT7