jony*5 Posted September 11, 2003 Share Posted September 11, 2003 It has been suggested that a passive crossover is needed for HF (not mid or bass) in a completely active multiway system - something to do with roll off Are both active and passive needed for HF???? Link to comment Share on other sites More sharing options...
Brian Posted September 11, 2003 Share Posted September 11, 2003 Are both active and passive needed for HF???? Not in a well designed system. The only reason you might want a passive low-pass filter is to filter off any ultrasonic signals that come out of the amp and toast your drivers. But as long as your active x-over sorts this out and your amps and wiring are OK it shouldn't be a problem. Link to comment Share on other sites More sharing options...
jony*5 Posted September 11, 2003 Author Share Posted September 11, 2003 Sorry, I didn't make myself clear... A passive high pass filter at the same frequency as the active crossover setting Link to comment Share on other sites More sharing options...
themadhippy Posted September 11, 2003 Share Posted September 11, 2003 All you need is a capacitor in line with the h.f driver to protect against any hf nastys,you could also put a small signal lamp in there as well,to protect against excesive levels destroying the tweeters Link to comment Share on other sites More sharing options...
Brian Posted September 11, 2003 Share Posted September 11, 2003 Sorry, I didn't make myself clear... A passive high pass filter at the same frequency as the active crossover setting The only possible reason to do this is to stop you toasting your HF drivers if you accidentally plug them into a full range signal. I've always used multi-way connectors to stop this happening. The only reason not to do it is cost, it's unlikely the filter will degrade performance. Link to comment Share on other sites More sharing options...
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