I don’t know what to do with or think about that 5Hz spike. You can’t hear it. But I am assuming this is how the hardware tested and UAD reproduced it. (See the API 550A.) Any ideas?

Anyway, you can’ t sit in front of this and not imagine you are in a 1950s sic-fi movie, flying across space in some rocket ship. Well, maybe you can but that is the vibe I alway get when I start turning the knobs.

This beast takes some time to get used to (and set). The broad curves get a tighter Q the more gain or reduction you apply. I like to think of this as grandpa’s Massive Passive.