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Does anyone have any thoughts on the use of a LT circuit to make a certain driver work better in a IB install? Specifically, I would like to use a RE 8 or some other relatively high-xmax 8 in my front doors for midbass duties. BUT it's pretty hard finding a driver with the right frequency response. So, I was thinking that a LT would possibly be the way to go.
Thanks, Ash
-------------------- ****************************** ****************************** Posts: 1130 | From: Los Angeles, CA | Registered: Aug 2001
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posted
No I am saying that I want a good 8" driver to use as a midbass, and my choices would be greatly expanded if I could use a LT, at least I think. These midbasses would probably be crossed over at, say, 60-65 Hz.
Anyway, I don't really want to build out a sealed enclosure in my doors, much less a ported one. Preferably, I could find a 8" driver that's designed for IB, like the ones JL makes, Illusion, Morel makes one, etc. But, I was thinking that I could get some extra flexability with a LT type application.
Ash
-------------------- ****************************** ****************************** Posts: 1130 | From: Los Angeles, CA | Registered: Aug 2001
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I'm not looking for huge SPL, in fact I will be running my subs sealed. What I AM looking for is midbass that can keep up in the 70-120Hz range. And, a common midbass 8" speaker has a very rapidly falling response in a IB setup, while I want a very flat response. Model up a low-Qts 8" driver in a VERY large sealed box (much like a IB setup) and take a look at its frequency response in the 65-120Hz area. Not flat at all....
Ash
-------------------- ****************************** ****************************** Posts: 1130 | From: Los Angeles, CA | Registered: Aug 2001
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quote:Originally posted by Ash: I'm not looking for huge SPL, in fact I will be running my subs sealed. What I AM looking for is midbass that can keep up in the 70-120Hz range. And, a common midbass 8" speaker has a very rapidly falling response in a IB setup, while I want a very flat response. Model up a low-Qts 8" driver in a VERY large sealed box (much like a IB setup) and take a look at its frequency response in the 65-120Hz area. Not flat at all....
Ash
your forgeting cabin gain
re8 is only about -3db@60hz
Posts: 3421 | From: Owosso MI, USA | Registered: Apr 2001
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quote:Originally posted by toxicbass_1: id use RTA to see what my curve is like.
using a generic one size fits all cabin gain statement doesnt do for different cars
measure it and see if it does what u want without extensive filtering.
the number stated is not taking cabin gain into consideration but is mirrorly a mockup of a IB alignment
measuring with an RTA is all well and good if he had the drivers, however, he doesn't and this thread is his way of trying to determine if he should spend $100+ on the pair
Posts: 3421 | From: Owosso MI, USA | Registered: Apr 2001
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posted
no measure another set of midbass(any) in the car,and out of the car on the ground in 2pi space,compare.
Difference=cabin gain
btw kan3 have u read about how small speaker boxes are nonlinear due to the air pressure inside them changing to a large % of the total? causing non linearity above 120db. i read it in an acoustic engineering book.Im wondering if it applies to ported boxes also,above tuning,in the sealed box operation part
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