Dual Tube Microphone Preamplifier

Built for James Cook

This is a simple dual mic/instrument preamp which uses 6AU6/EF94 tubes. It includes phantom power and a 20dB pad as well. The sound is very clear for a circuit with no global negative feedback. I've used IRF820 transistors as DC source followers for a reasonably low impedance output to interact well with modern soundcards. This all adds up to a very small portable package which is great for recording on the road or at home.