Studio Electronics Boomstar Modular - Manual (Page 17)

AMP Module
Description
From Designer Tim Caswell’s own hand: The amplifier (AMP) is a 2 stage Class A discrete design using three pairs of hand matched
transistors. Envelope is usually applied to ST1 CV1; ST1 CV2 goes thru an attenuverter and can be used for envelope or modulation;
ST2 CV1 goes to the 2nd stage, and is typically used for volume control; ST2 CV2 goes thru an attenuverter providing access to the final
stage of modulation input.
!
The AMP, the 5089, and the 3003 are Class A circuits. They draw more current from the +12 rail than from the -12 volt rail. If the
system power supply is under-sized, hum or buzz may be heard. In that case, larger filter capacitors and/or a larger power transformer
will be needed. The 4075 draws equally from both rails, and is more immune to hum. Like our time-perfected filters, this Boomstar
Modular AMP module, a gorgeous all-in-one discrete VCA charmer, is hand-built entirely in the U. S. of A—just ask Rachael Herbison!
!
Potentiometer Potential
Four attenuation pots control the INPUT, ST1 CV2 (CV), ST2 CV2 (CV), and OUTPUT, for smooth, detailed, and complex expression.
!
Switch It Up
Uber-useful continuous hypnotic DRONE for endless sustain/release, and DRIVE—the overdrive circuit from the Boomstar desktop—for
last stage push, clipping, good ‘ol dirty vintage fuzz fun, and tone-crushed distortion.
!
Patch It Up
Six patch points: INPUT, ST1 CV1, ST1 CV2, ST2 CV1, ST2 CV2, OUTPUT direct the deepest manipulation.
14