mboxler Posted February 17, 2021 Share Posted February 17, 2021 While toying around with filters, and stumbled upon something, though I doubt it's anything new. It pretty much eliminates the 8kHz bump on my K-55M drivers (K-400 horns). The prototype consisted of three components. A series 330uh inductor followed by a 400uh/1uf series notch filter to common. It sits between the crossover's squawker out terminals and the K-55M. Attached are sweeps of the K-55M in series with a 24uf capacitor. Talk about an extreme slope! The "M-Trap" creates a fairly steady drop from 5850Hz to 11000Hz. I know a P-trap has been used to reduce the bump. Others say the bump is not audible. Unfortunately, I only have ALK crossovers, so I can't comment either way. Still, I thought I'd share my find. Apologies to anyone who already tried this. Mike 1 Quote Link to comment Share on other sites More sharing options...
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