Dave A Posted May 8, 2020 Share Posted May 8, 2020 OK working on getting things fixed up here and have a question. The passive crossover for the LF of say the 904 and 456 has two woofers and the crossover is a 2.75mh coil and a 50uf poly cap. The 415 is broken down into two sets of two woofers and so should I fix a crossover for each pair or will the one be sufficient for the four? Quote Link to comment Share on other sites More sharing options...
JohnA Posted May 8, 2020 Share Posted May 8, 2020 One passive crossover, designed for the impedance of all 4 woofers together would be the simplest. From your description, they are either two 4 ohm woofers in series for 8 ohms and then paralleled for 4 ohms, or each pair is connected to its own terminals on the back for two 8 ohm connections. That would allow for driving them with 2 different amp channels, right? Quote Link to comment Share on other sites More sharing options...
carlthess40 Posted May 8, 2020 Share Posted May 8, 2020 If I remember correctly, when I had my 904’s and a set of kpt-484 subs. They where all 8ohm drivers. And my kpt-904 has the pas/crossoversSent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dave A Posted May 8, 2020 Author Share Posted May 8, 2020 2 hours ago, JohnA said: One passive crossover, designed for the impedance of all 4 woofers together would be the simplest. From your description, they are either two 4 ohm woofers in series for 8 ohms and then paralleled for 4 ohms, or each pair is connected to its own terminals on the back for two 8 ohm connections. That would allow for driving them with 2 different amp channels, right? I believe the original barrier strip had them split into two pairs parallel. It looked like they meant for two amp channels. One of the forum members sent me a wiring method to tie all four woofers into one circuit as a 4 ohm and that is another option. I just don't know if the single 2.75mh and 50uf crossover would be stout enough for that. The ones I sell I have to assume the new owner is going to push them as hard as they can so I want the crossover to be able to safely do that. Quote Link to comment Share on other sites More sharing options...
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