I have been working on this new design for a unit that has an RCA BC console style preamp using two 12AY7/6072 preamp tubes along with an EQ circuit based on the Baxandall layout using a 12AX7 and 12AU7. I am not so much looking for a neutral EQ, rather I want a heavy handed type similar to those from mono PA mixers from the 60's. This circuit started as the EQ and line amp from a Bogen mixer as a matter of fact. The output of the preamp is wired directly to the EQ input via the switches on the 1/4" jacks, but the two circuits can be separated of course. I have built this preamp circuit before, have one of these Bogen mixers already, and I have used the two together. So I have a good idea of how the final product will sound. This week I will be building a pair of integrated units with the modified circuits into some Akai / Roberts monoblock chassis. Anyway, I am just looking for opinions on what I've got going on here before I put them together.