What is the frequency range of a typical subwoofer in a club PA?
I am an amateur producer of techno music. Needless to say, low frequencies have a high importance to the sound in this genre. I have often read that generally in a final mix, very low frequencies should not have any stereo components, as there might be noticeably bad effects on club systems that mix them down to mono, or by interference. I have been doing that sort of intuitively around 150Hz--by placing an EQ on the master and have it cut any stereo content below that frequency--but I've been wondering if someone who knows about where the frequency splitter of such a system operates could come up with a guide value.
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Getting 10 Hz lower on a sub can double the cost. So a lot of affordable subs really kick in around 50 Hz while the most expensive ones maybe get as low as 35 Hz or so. On the high end, the subs will usually be able to go up to 300 or 500 Hz but the actual crossover frequency used is determined by the whole system, usually between 150 and 250 Hz.
I would cut the low frequency content out of reverb sends and maybe delay sends, and 150 Hz is a good choice for that. I would also use sidechain eq for bass and drum compressors and cut below 150 to 250 out of the sidechain, or use parallel compression.
You should always check the entire mix for mono compatibility. And you should not mix with a specific crossover point for subs in mind. Don’t cut everything below 150 for the whole mix. If that’s what you’re doing (it’s not totally clear from your question) then you’re throwing away some really important frequencies. Do cut everything below 40 Hz from the whole mix before you do any final compressing or limiting. If your whole mix works in mono, then you have done your job making it good for clubs. The rest is up to the design and engineering of the club sound system.
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