This preamp circuit is base on Pete Millet Low Mu circuit.

This is build with 3 input and 2 output.

The wood is oak in 12.5x12.5x4" coated with classic oak in satin stain.

The top aluminum is 12x12x1/8" mirror polished from Mcmaster Carr and the bottom aluminum is 12x12x1/16".

The tubes are NOS RCA 5U4g, NOS RCA 6080 and JJ El34 x2.

If you want a video of this in action please let me know.