The SA-4000 MK2 applies Stam iterative refinement to their SSL bus compressor, addressing VCA matching and power supply performance for improved stereo operation.
SA-4000 MK2
2019–2021
The Stam Audio SA-4000 MK2 refines their SSL bus compressor recreation with component upgrades and circuit improvements. This revision maintains the famous SSL glue and punch while offering enhanced reliability and closer adherence to vintage SSL 4000 behavior. The MK2 improvements include upgraded VCA and power supply design for improved stereo tracking and noise performance. The SSL bus compressor remains the most popular mix bus processor ever made, and the SA-4000 MK2 brings this legendary sound closer to the original with refined component selection and build quality. (Discontinued — superseded by SA-4000 MK3)