Originally Posted by ajl1
so if I switched from the L8400 to an HTPS400, what xover frequency do you use in place of the missing "LFE" switch I use now?
It depends on what your current speakers are good at. With the Performance Series set up at my place, the HTPS400 and PS1400 meet at 40 Hz. Yep, they're only running from 40 Hz on down to 21 Hz (measured at -5dB at that point). Yes, for the technically minded the crossover slope means they're still outputting something above 40 Hz and below 21 Hz, but I think everyone understands that. Well, if I really believed that no one would point out the obvious, I guess I wouldn't have to write it, huh?
In any event, it seems like a waste of four powerful subs! You've heard it, though, so you must have an opinion about how well it works.
The LE14H-3 is pretty solid down to around 32 Hz, but letting it back off a little gives it more alacrity in the 40-130 Hz range that it's still outputting fully.
Whatever you pair the HTPS400 with, I'd start with the lowest available crossover that matches where your current speaker starts to run out of gas, then walk the crossover point up incrementally until you find the better one. Having a test disk with a LF tone sweep is a nice tool to use, and if you couple it with a keen ear and an RTA, you can see as well as hear what's going on. I wrote "better" rather than "best" because all will have compromises. You decide which one sounds the best to you.