FlatLine Compressor

From the vendor

John Hollis' relatively low parts count optical compressor. This fits in between the 'is it on' and 'super squished' camps. With the sustain control dialled back you have approx 3X gain between soft and hard signal, fully dialled you have 20X which makes the output super flat and incredibly sustained. Utilises a NSL-32 optocoupler rather than risk the vaguery of rolling-your-own LED/LDR combo. We've also replaced the germanium diodes with BAT46. The end result is identical and the diodes are a much tighter spec than their vintage cousins. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is only available with full kits, and can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knobs are not included. Inspired by: Flatline Compressor Difficulty: Easy PCB size: 50 x 30mm Knobs required: 2 Enclosure: 1590B Direct-Connect compatible (4-way) Download INSTRUCTION PDF