thank you thats what i wanted to know. He was being sarcastic. Anything can play normal music. You don't have to have only one or the other. There is very much a range from 0-100 in the SPL-SQ ratio. You can definitely have a 50/50 mix IMO. For instance, my ported box tuned to 30 hz is about 50/50. It has a bit of a bloated 30-40 hz response, but definitely plays more frequencies better than a box tuned to 50 hz for an SPL competition would. e wasn't being sarcastic at all. Specifically designed SPL subs will not fare well with music and will destroy themselves. An SPL install should have an SPL driver, that is of course if you actually want to win which would mean indeed a true SPL install would destroy the sub if it were playing music. Not at all. Daily is another horribly inconsistent and never used appropriately term just like SQ and SPL. 99.999% of people that use the term daily are really referring to an SPL oriented sub that isn't so SPL oriented that it can actually play music. Not to get into a tussle or anything Sean, but that's why I put "Generally considered" in there. SQ and SPl are polar opposits, we agree on that. Daily is more in the middle of that, as a system that will not sound bad by any means, and is not a one note wonder.