Nod to The Legend · The gear · 1968
Saul Walker and API
Designer of the 2520 op-amp and the 550 EQ
Walker's API consoles used his discrete 2520 op-amp and modules you could pull out and swap. That slot became the 500 series format, so one rack could hold boxes from many makers.
Still heard: API's punchy, forward sound is still a go-to for drums and guitars, and the 500 format is everywhere.
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