Originally Posted by Linkwitz Riley
If I elect to go the L/T route with this driver and a 3.5 per driver enclosure (unless you recommend a diiferent size), can you please provide the numbers below that you feel would be most appropriate for this driver based on your experience in building these circuits in the past? Thanks!
f(0) = ? Hz
Q(0) = ?
f(p) = ? Hz
Q(p) = ?
Start with Fo = 35, Qo = 1.2, Fp = 20 Hz and Qp = .71. Shoot for +10dB of boost, no more.
The spread sheet will only let you work within the laws of physics as there is a relationship between the amount of boost and Qo to QP, so just make sure that the k value is >0. If you drop below 0, there will be negative values for the components, which is, of course, impossible. k value can be 0.01, but must be >0.
If you get a <0 k value, change the Qo to a slightly lower number and check the k value. After some experimentation, you'll see what the allowable parameters are and you can fine tune the final response from there. Post a screen cap of the final solution if you get a chance.
Originally Posted by Scott Simonian
Lol! C'mon, Dave.
I would just like to see you two not do the snippy back and forth sometime.
How is everything going, btw? We are missing you on the DB forums.
I know that, but it is what it is. I'm just trying to prod LTD into actually building a sub and testing real world tweaks so that he'll get out of the grid and into the real world. His advice will step up a notch, which is a good thing.
Been upgrading the rack, so no SL caps until I'm finished. Going with a new signal chain to see if I can get flat to 3 Hz before the roll off and what that'll do to system requirements. I'm also finalizing the AntiHorn satellites system (mains, CC and surrounds). Pretty freakin' awesome so far... info thread to follow.
Originally Posted by LTD02
"If your aim is to build a L/T circuit for this sub, you would not use .61 as the Qo. If your aim is to throw a 2nd order shelf at the problem, that's a whole different story in which the Qtc is irrelevant."
ok. that's all i was getting at when i mentioned the shelf filter could be used to bring up the bottom end.
Yes, I knew that, but it's confusing to people reading who don't know that. The thing to do is to post the result of your advice along with that advice (like you eventually did). If I could get away with a shelf, I would do it, but it isn't the optimal solution.