Wierd xover point (Off Topic)

by Jim D., Friday, February 24, 2006, 18:16 (6635 days ago)

There is a post below "I'm in" asking about xover points. I had a strange experience with this crossing Altec bass bins over to my Oris 200 (AER) horns. I had to push my xover point all the way down to around 90 hz to get a seamless match. I confirmed this with 2 different xovers and I also measured the xover outputs with a VOM and signal generator connected to the input. The slope of both xovers I have is 24 db/octave. The bass cabinet is an Altec 515-8g in a BR enclosure with a 135 hz rectagular tractrix front loading the woofer.

The stock xover kit I bought (Welbourne Labs) came with a 220 hz xover point that did not work at all.

Any thoughts on what's happening? Tractrix attentuating this much?

Jim D.

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