Friday, 20 November 2020

Boss SP-1 Spectrum

 A fairly rare old Boss eq pedal which is rarely cloned due to the dual 10kA/10kC Balance control. However, it is quite easy to make your own if you have a dual 10kA pot and a single 10kA pot on hand. Custom pot tuturial and schematic is avaiable HERE

 

 




Boss FA-1 FET Amplifier

 Slightly modified, subbing the two single op amps of the original to a dual. 1458 or 4558 should match the spec of the original ones.