fi q box

[wp7456 10+ year member]

I'm going ported, FI says to do anything from 2.6 to 4 cu. ft. I figure I can use one of the free box designs in the sticky. Will I notice a difference if I use the "3.5 cu. ft. @ 32 hz #1", or the #2 or #3? Also what would be the differences in sound using a 2.6 or a 4 cu. ft. box?

I have never built a box before but I have a friend who has done 2 or 3... is it really that hard or can I figure it out with the right tools and patience?

Click to read more...

 

[mlstrass 5,000+ posts]

assuming a 15" Q then 4cubes @ 32Hz works very nice for daily...

 

[wp7456 10+ year member]

yeah my bad its a 15", the picture under free box plans is gone for 4 cubes, but 3.5 is still there, would that give me less sq having a smaller box?

 

[mlstrass 5,000+ posts]

SQ will be fine, just won't hit the lows quite as much. How much power do you have for it?

 

[wp7456 10+ year member]

a kicker 08zx750.1 benched at 928 rms. Since it is a little less than what is recommended (1000 watts) should I go for the 12? idk if more cone area and less power is a bad thing or not...

 

[jbizzle 5,000+ posts]

a kicker 08zx750.1 benched at 928 rms. Since it is a little less than what is recommended (1000 watts) should I go for the 12? idk if more cone area and less power is a bad thing or not...

Same motor. The 15 will get louder than the 12 off the same power.

 

[wp7456 10+ year member]

interesting, so would an 18" be viable with my amp? I have never even heard an 18" sub before..... I am assuming it gets much louder and maybe even "deeper". But would I lose SQ going to an 18?

 

[CadillacMatt 10+ year member]

To the OP - I was wondering the same thing, don't mean to thread hijack but I was getting 2 15" Fi Qs (like the OP stated they need 2.8-4cuft ported. That means a box 5.6cuft-8cuft.

Like he said is there a difference in sound with a lower box (a "lower" sound?) I know the power handling decreases with larger enclosures but I don't know how that translates to what you hear. thanks

 

[wp7456 10+ year member]

Do I need to account for space taken up by the sub? So would FI be recommending a "net" 2.8 - 4 cu. ft. or is that after displacement (counting the sub)?

 

[Buck 5,000+ posts]

i have a box that is 4 cub ft at 32 hz with aeroports. Do you wana buy?

 

[Freelander 10+ year member]

i have a box that is 4 cub ft at 32 hz with aeroports. Do you wana buy?

pics?

 

[Buck 5,000+ posts]

pics?

just a min i will get them

 

[Buck 5,000+ posts]

View attachment 26506527

 

[wp7456 10+ year member]

interesting, is that box a 15"? Is there any difference using aero ports rather than a normal port? Also how does port direction affect the subs performance???

 

[sqhertz 5,000+ posts]

i had my 15" q in 3.8 @ 30hz on 1kw.

it got VERY loud in the blazer.