Originally Posted by coolrda
I counted that I've run over 130 test runs just with my Crowsons over the last two months. I've also watch several complete movies with just the Crowsons by themselves and with the mains, no subs. I've adjusted, placed, wired and eq'd just about every way I could think of. I've had subs on point and blended in the MA's, then vice versa. I spent days just adjusting delays/distance. I spent days just swapping xovers while listening to music, movies and test tracks. What i found was they work together a cohesive unit. Pretty much what we already know but it was good to go through the process. You can't ask one to substitute for the other, they work together to accomplish something a sub can't do on its own. Likewise with the transducer. Once you have both there's no going back. You get awesome adjustability but greater complexity. So yes I've tried just the MA's below 20hz and you definitely need the FR and SPL below 20hz from a sub, it's absolutely essential as it brings weight to the performance.
I've eq'd my system flat from 5-70hz and I didn't like it. Not below 20 nor above 35hz. I guess I like my bass lumpy. If you can get a nice 3db/icy slope up going from 80 to 5hz you'll be ok. Keep it in s 5-10db window and you'll be fine as long as peak null aren't to close or sharp. If I had a do over, I'd go the 2xHST18 Or 24" and 2x12 MBM's. Using both sub and TT's give you flexibility.
I haven't read the whole thread - but do people realize you sometimes hear pitches beyond the capabilities of their audio equipment AND their ears due to "aliasing "- but at a different frequency?
The idea is that the sampling rate of your audio equipment, or some other phase in the end-to-end audio system, beats against the frequency of the sound - so you hear it at a different pitch. It's a lot like the way that wheels on cars sometimes appear to go the wrong spead, or go backwards, in movies and videos.
The problem is particularly common in on-line sources, because they often have low sampling rates.
I know this is a problem at high frequencies. It's one of the reasons recording equipment should incorporate a low pass filter. I can't figure out if there is a low frequency problem too. I.e., if a sound too low to hear could be aliased to a sound high enough to hear by your audio equiopment.