Help on what i need to do to my truck

[beat-down69 10+ year member]

I did have 2 15 inch alpine type R subs and a Hifonics HFi1500d amp in my 96 gmc sonoma ext cab. I have a optima yellow top bat under the hood and a 6 farad cap and 4 guage power wire. Everything was completly perfect. In my opionion it sounded great and really loud.

Well then i came across 2 Re Audio Mx 12s and a Hifonics HFI 2500d amp. So i bought them. Well i hooked up the Re subs in my truck with my 1500watt amp first just to see what they would do. Well now all my lights will dim really bad and my battery guage will drop to 9 volts after each hit.

So i know when i hook that Hfi 2500d amp up it will probly shut my truck off LOL So can any one give me some advice of what to do.

Click to read more...

 

[mylows10 5,000+ posts]

get rid of the cap and do the big 3 then go from there. ho alt extra battery maybe

 

[beat-down69 10+ year member]

yea i was going to do the big three but do you think i should upgrade my power wire to 0 guage

 

[keep_hope_alive Premium Member]

Yes. Upgrade to 1/0.

Sounds like you have a lower impedance load on the amp.

 

[beat-down69 10+ year member]

Are you talking about the amp being lower then 1ohm stable

 

[SourDeez 10+ year member]

Are you talking about the amp being lower then 1ohm stable

Chances are you wired it wrong when you setup these new subs.

If your Type R's didnt dim your lights with the same amp on the same amount of wattage, changing subs will make no difference in electrical output or RMS output of the amp..basically the amps pull power.. not your subs

The only way to strain the electrical load would be by increasing the current pulled. Most likely you accidentally wired it to .5 ohms or something lower even?

What voice coil's do the Type R's have, and what are the MXs?

 

[MisterDeadeye 10+ year member]

What voice coil's do the Type R's have, and what are the MXs?

This.

 

[beat-down69 10+ year member]

The type r subs are dual 4 ohm and the mxs are dual 1 ohm and according to Re Audio i wired them the way they told me to for 1ohm

 

[MisterDeadeye 10+ year member]

Oh. Well, nevermind then. Unless you managed to read the diagram incorrectly. Did you wire them like this?

 

[beat-down69 10+ year member]

On the Mx subs i connected + from one coil to a - on the other coil on the same sub and + and - to the amp. I done this for both subs and that is suposed to be 1 ohm load

 

[beat-down69 10+ year member]

yea that is exactly how i wired them

 

[beat-down69 10+ year member]

so that is y i am lost and dont really know what to do

 

[SourDeez 10+ year member]

On the Mx subs i connected + from one coil to a - on the other coil on the same sub and + and - to the amp. I done this for both subs and that is suposed to be 1 ohm load

Hmm.. thats odd. You should have a 1 ohm load both ways then... If all your settings on amp are the same, I have no idea how giving different subs the same amount of power at 1 ohm would change like that.

The only thing I can think of is either a loose ground or you possibly wired your type r's wrong originally (maybe you were running those 4 ohms) or you wired these up wrong.. Double check your wiring. And check the grounds too.

Were these MX's used or new? I would maybe check the coils on them with a DMM ($15) and see for sure what the coils read.

 

[beat-down69 10+ year member]

I used the12volt.com wiring to do the type r subs and the mx subs were new and i already ohm'd the coils and each one read 1.2 ---1.4 ohms each

 

---------- Post added at 11:05 PM ---------- Previous post was at 11:04 PM ----------

 

Now i havent checked any ground wires or nothing that was the next thing i was going to do after i did the big 3 setup

 

[SourDeez 10+ year member]

I used the12volt.com wiring to do the type r subs and the mx subs were new and i already ohm'd the coils and each one read 1.2 ---1.4 ohms each

 

Hmm.. yea thats crazy.. Something's pulling some crazy current, or maybe your alt took a **** or something.

 

Check your grounds.. its easy.. are they corroded anywhere? Is your battery terminal corroded? Try to reground somewhere new, maybe its loose. Like i said, double check all wiring again.

 

Big 3 will help, but still, 1500 watts is 1500 watts, the subs wont change that. So if you were fine before you should be fine now.

 

The 2500 on the other hand will most definitely need the big 3.