Summit Audio 2BA-221 Microphone / Line Preamp The variable-impedence Summit Audio 2BA-221 Tube Mic and Line Module is a microphone preamp that has individual controls to mix mic with Hi-Z or line inputs for variable vacuum tube output. You can mix them together through 12AX7A/ECC83 tube output or separately through individual solid state outputs. A stackable input design allows multiple 2BA-221s to be linked for a modular mixing device with individual outs, inserts per channel, and a final vacuum tube gain stage. Its swept high-pass filter, multiple simultaneous tube and solid state outputs, insert jack, and internal power supply makes the 2BA-221 a powerful tracking and mixing tool. Features Variable mic input impedance from 100 ohms to 10K ohms Variable high-pass filter Hi-Z instrument, line, and mic level inputs Hi-Z input and mic input available simultaneously with separate gain controls Separate solid state and tube outputs Insert jack Stackable with more 2BA-221s 1/2 rack size 3 year warranty XLR and 1/4" I/O 3 variable, independent gain stages
