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Fmod - more info please

 

Bronze Member
Username: Kitkatt

Post Number: 31
Registered: May-05
thanks for all the help so far, but i have another question...planning on putting my new IDMAX12 into a slot-ported box, with the MTX801D amp. this amp has no subsonic filter.

if my box is properly tuned (30 or so) do i still need to use an f-mod? does an f-mod work as well as a subsonic filter? will it alter impedence at all? I read an old thread (Fishy) that confused me a bit. does anyone know about this?? will i ruin the sub if i put it in a good box with no f-mod, or does it change sound, or what?? Thanks!
 

Gold Member
Username: Invain

Michigan United States

Post Number: 2559
Registered: Aug-04
Yes, you'll need some kind of subsonic filter. The fmods will work perfectly. If your box is tuned to 30 hz, then pick one up that's set at 25 - 20 hz, high pass.

"does an f-mod work as well as a subsonic filter?" - Yes, it is a subsonic filter...

"will it alter impedence at all?" - No, it has nothing to do with the wiring of the sub, fmods plug inline with the rca cables
 

Bronze Member
Username: Kitkatt

Post Number: 32
Registered: May-05
image dynamics told me no f-mod when i called to ask them...said just make sure i use a box tuned pretty low (30) thanks for your help but i's still a little confused
 

Gold Member
Username: Invain

Michigan United States

Post Number: 2605
Registered: Aug-04
It's still not a bad idea to have one. Even if it is set at like 20.
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