What I should upgrade next

[Imperial _Ghost]

I have 2 SA-12s on a 2800 AD DB drive amp with 0/1 gauge wiring. JVC Head unit. Also with a soundstream B20 bass processer. The box is custom made for SA-12s 1.75 cubic ft. I have about 500$ and trying to get louder. I do have a stock alternator but it does produce 15v. I had to get a new battery after I installed a capacitor. Please leave suggestions. Thanks

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[ilikeradios 10+ year member]

box seems a bit small to me, I think those subs like 2 - 2.25 each.

Your alternator should not be putting out 15 volts, are you sure that was measured correctly?

Is the big 3 done?

What voltage are you running with the system up?

 

[Imperial _Ghost]

box seems a bit small to me, I think those subs like 2 - 2.25 each.
Your alternator should not be putting out 15 volts, are you sure that was measured correctly?

Is the big 3 done?

What voltage are you running with the system up?

My stock alternator puts out 15v on my capacitor and I think the stock wiring for the big 3 is 6 gauge. The voltage drops to about 13.9v when hitting hard. 08 Ford Focus.

 

[Boomin_tahoe 5,000+ posts]

There's your problem. Your big 3 should be 1/0, not 6 gauge.

Get rid of the capacitor after the big 3 wiring is fixed. Waste of $$ for those.

What vehicle and how much room you have?

 

[Imperial _Ghost]

There's your problem. Your big 3 should be 1/0, not 6 gauge.
Get rid of the capacitor after the big 3 wiring is fixed. Waste of $$ for those.

What vehicle and how much room you have?

My alternator is in the back left of my engine so it's not very accessible. Room where?

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[Boomin_tahoe 5,000+ posts]

My alternator is in the back left of my engine so it's not very accessible. Room where?

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Oh really? So how did you manage to get 6 gauge in there then?

Room for more subs, if you have any.

 

[Imperial _Ghost]

Oh really? So how did you manage to get 6 gauge in there then?

Room for more subs, if you have any.

It came stock with the wiring, and it's compact car but I did mange to get a 4 cubic foot box in there at one time

 

[Boomin_tahoe 5,000+ posts]

Again, what vehicle is it? Yeah big 3 is a must. That STOCK wiring, as what it's called, isn't gonna cut it.

Don't care if it's compact. There's a will, there's a way. Anything is possible.

 

[Imperial _Ghost]

Again, what vehicle is it? Yeah big 3 is a must. That STOCK wiring, as what it's called, isn't gonna cut it.
Don't care if it's compact. There's a will, there's a way. Anything is possible.

08 Ford Focus

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[Austin175 10+ year member]

I'd at least take the time to do your big 3 in 1/0 you don't want to skimp on the electrical, & if you managed a 4cf box then you should have enough room as stated there going to like a box that's bigger because recommended is 1.5-2.0cf per woofer.

 

[Boomin_tahoe 5,000+ posts]

Better design for those subs. That box you have now is prefab. Hit up @CSCStang for a design for those.

These newer cars/trucks....getting to be a pain intheass to work on.

 

[Imperial _Ghost]

[quote name='Boomin_tahoe']Better design for those subs. That box you have now is prefab. Hit up @CSCStang for a design for those.

These newer cars/trucks....getting to be a pain intheass to work on.[/QUOTE]

I have a 1.75 box for them now that was designed for them, the black box was the old one. This is the only video I have of the new box tuned at 35. Also in my opinion this box is louder. https://vimeo.com/198790835

 

[Austin175 10+ year member]

I have a 1.75 box for them now that was designed for them, the black box was the old one. This is the only video I have of the new box tuned at 35. Also in my opinion this box is louder. https://vimeo.com/198790835

Is that 1.75cf the total size of your box or is it per sub? If that's the total cf for the box it's to small.

 

[Imperial _Ghost]

Is that 1.75cf the total size of your box or is it per sub? If that's the total cf for the box it's to small.

It's 1.75 per sub

 

[Boomin_tahoe 5,000+ posts]

Min 1.5 PER driver. so that should be 3 cu ft for both subs. That 1.75 cu ft ported box still too small.