Still learning alot but can't seem to find much info about inductors and subs here. I saw a few posts where an inductor in series with the driver magically flattened the frequency response of a sub. Are these typical used? I think an inductor is a component of passive crossovers?
Been simming everything and have pretty much discounted all "saddle shape" outcomes and have focused on flatter responses. Seems like all the high power drivers have extreme saddle shapes. Are these just easily fixed by an inductor? So should I be mainly focused on low corner and SPL? (for PA use)
Can someone point me in the right direction or explain?
THANKS
Been simming everything and have pretty much discounted all "saddle shape" outcomes and have focused on flatter responses. Seems like all the high power drivers have extreme saddle shapes. Are these just easily fixed by an inductor? So should I be mainly focused on low corner and SPL? (for PA use)
Can someone point me in the right direction or explain?
THANKS
zwiller, what type of designs are you shooting for?
I'm assuming TH by your "saddle shape" description.
Heres some basic notes on TH design
1) Look for FS to be higher than low cutoff
2) Look for a high bl (low qts) driver. the larger the driver, and the lower your target frequency, the more BL you want (generally)
one of the most popular "saddle shape" offenders is the Pal 12. notice, the lab 12s fs is lower than the low cutoff, AND the driver doesnt have a terribly powerful motor, thus the result is peaky. The price of the lab12 and the availability of eq makes it worth building for many though.
3) Saddle shapes are "ok". a lot of the horn resp sims we make look terrible, but if you look at the scale, they are only +-2 db or so, which is still well within the guidlines of "flat"
4) for pro sound use, EQ is a necessity. The room will affect final system response more than you box will in some cases.
outline some of your design goals IE Low corner, target sensitivity/target max output capabilities, size constraints (rough liter estimate will do) and budget.
I'm assuming TH by your "saddle shape" description.
Heres some basic notes on TH design
1) Look for FS to be higher than low cutoff
2) Look for a high bl (low qts) driver. the larger the driver, and the lower your target frequency, the more BL you want (generally)
one of the most popular "saddle shape" offenders is the Pal 12. notice, the lab 12s fs is lower than the low cutoff, AND the driver doesnt have a terribly powerful motor, thus the result is peaky. The price of the lab12 and the availability of eq makes it worth building for many though.
3) Saddle shapes are "ok". a lot of the horn resp sims we make look terrible, but if you look at the scale, they are only +-2 db or so, which is still well within the guidlines of "flat"
4) for pro sound use, EQ is a necessity. The room will affect final system response more than you box will in some cases.
outline some of your design goals IE Low corner, target sensitivity/target max output capabilities, size constraints (rough liter estimate will do) and budget.
Last edited:
also ,most (all) drivers induction value's are at 1khz and somethimes 10khz.
induction rizes at lower frequentie.
you can savely double the le value for a sub< 100hz
induction rizes at lower frequentie.
you can savely double the le value for a sub< 100hz
Last edited:
Thanks guys. Forgot to mention it, but yes, I am talking TH. I am starting to draw some of the same conclusions as you posted sine but still unable to fundamentally understand how the parameters really affect a design. Hopefully, that will come.
Sorry, EPA your post is just over my head, although I am committing it to memory as I trust it is relevant.
So, it sounds like inductors are some sort of passive eq but it is generally preferred not to use them.
Sorry, EPA your post is just over my head, although I am committing it to memory as I trust it is relevant.
So, it sounds like inductors are some sort of passive eq but it is generally preferred not to use them.
- Status
- Not open for further replies.