170

The Buchla 100 series' dual microphone preamplifier (1960s), drawn in its San Francisco Tape Music Center panel: two preamplifiers, A and B, each with a latching microphone input, an IMPEDANCE switch for low (30-50), medium (150-250) or high (50k) impedance microphones, a large GAIN knob from zero to max and its output on two jacks.

Key features

• Two microphone preamplifiers
• Input impedance switched for the microphone
• Each output on two jacks