True. :T However, if you’re equalizing full range, it wouldn’t be unusual to have say, 4 filters for the subs and another 3-4 for the upper range. So, 7-8 total. But yes, 12-20 filters like the OP is asking about – overkill.But if I've read the advice correctly the use of so much EQ isn't advised. Minimalism is the conventional wisdom.