3 sealed FiQ12's

[thumperxes 0]

First post go easy -just kidding you can be brutal if needed.

I have been curious as to the Fi product and have always wanted to hear and see 3 12's across the rear seat opening of my mazda 3 06 there is enough room and the boxes are built. you build it they will come. I am not happy with my box size but well in range at 1.1 ish after displacement each, there are 3 seperate boxes it was the only way to get in. I may redo the boxes to achive more like 1.3-1.4 after displacement but unsure as of now. each sub will have a 1000 watt amp on each. i plan on crossing over the middle sub at 80hz range and the 2 outer subs at a lower hz to be determined maybe around 40-50 hz to creat a tapered aray setup since i have no eq yet on the subs. Dont like the high bass notes in the 80hz range it can get overpowering. My current goal is to be SQ and to be verry loud.

Just wondering if i will be overjoyed with this setup befor hearing it as my subs are in route to be here on the 11th. If all else fails i will give up my trunk to a full box and still keep my spare and build a 3-12 ported monster firing through the rear seat opening, i know this would be the best route bu i like being able to put things in my trunk.

[johnecon2001 82]

Less is more in an SQ system. The way you're describing doing things will only result in unfavorable sounds and cancellation.

You're going about this whole thing wrong as well. SQ =! Loud. Pick one. Three amps on three subs is also difficult way to wire and make sure every thing is the same. One large amp would have been the way to go.

[thumperxes 0]

Less is more in an SQ system. The way you're describing doing things will only result in unfavorable sounds and cancellation.

You're going about this whole thing wrong as well. SQ =! Loud. Pick one. Three amps on three subs is also difficult way to wire and make sure every thing is the same. One large amp would have been the way to go.

less is more i can respect that and say that my self. but i also have 6 years in car audio and have compeated once in my first year in a sq comp at sbn 03 and too 2nd lost by like 3 points or something like that didnt know i needed pics of install that was my dumass fault as they were left at home. Just striving for some thing different. as i know in my hear it can be done plus i have a friend that had 3 kicker 10s square for sq. so i know it can be done he is almost un beatable in his class. I will keep this post updated ad to pics and how it sounds.

[johnecon2001 82]

ok.. so basically, you just said, "I don't care, I'm doing it my way anyway".

Nice.

[thumperxes 0]

we are all friends here but lets induldge in this a little

basicly by a less is more theory=

one full range speaker for sq is ideal = i dont belive this to be true but can sound nice in proper horn box for the home using a foxtex in a horn box for car audio (no)

a 2 way mid and tweeter for sq better

a 3 way tweeter mid and midbass/woofer = even better

a 4 way tweeter mid and midbass/woofer and a sub woofer even way better

see where i am going with this

as it gets harder to reproduce the extreme low notes it would be ideal to use multiple low frequency drivers to help re-enforce the lows as you can always tune down the upper bass notes but can hurt a single speaker if you turned up the eq on the low notes and created a clipping problem which could damage the speaker. of course i may not reach the full output potential of 3 subs powered at maybe x-over at lets say 80hz but raw spl is not what i am after, more of a LOUD SOUND QUALITY is where i am headed

as long as we are cool with each other posting our replies i am happy with this constructive debate and if it gets rude or offensive let me know and i will stop and appoligize

[johnecon2001 82]

You're not talking about mid and mid bass though. You're talking about two different subwoofer crossover frequencies.

This is only going to lead to tears.

Your theory applies for front stage.. but only to a certain point. More drivers without the right processing won't help anything.

[KU40 173]

I agree with John, separate crossovers on subs is a silly thing to do. One amp for all three subs would be much easier as well.

[thumperxes 0]

just wanted to show my set up with the rear seats down

[KU40 173]

looks nice

[bigjae1976 0]

Looks nice. Those 3 12s must be brutal.

But there is no reason to have a 2 way sub stage.

You would normally set your crossover to keep a certain speaker within the freq range that it is optimized for. For example, you'd place a hi pass filter at around 100 hz on your 6.5" midbass to keep it from playing sub bass notes. This protects the speakers, increases, efficiency, and enhances SQ by limiting distortion by not exceeding the speakers capabilities.

With that in mind, there is no reason to cross an Fi Q 12 at 50 hz. It can easily play frequencies in that range. You are not gaining anything by installing a crossover in your substage. If anything, you might create a lot of headaches.

Or it all could sound fine. But you really aren't gaining anything from doing that.

Edited December 18, 2008 by bigjae1976