The Altec 1612A is a vintage microphone / line amplifier with a built-in limiter section. Introduced in the 1970s, the unit imparts its sonic coloration onto the source material.
The Altec 1612A works extremely well on drum overheads and can also be used as a parallel compressor, where the unit adds tone and sustain to the incoming material.
The unit has 2 groups of attack and release settings:
Fast - 10ms Attack / 0.8s Release
Slow - 33ms Attack / 2.8s Release
The Gear Rack