Hmmm...confusion...help please?

[Sean96sx 10+ year member]

Alright, I am new here, hello...i'm Sean. Now that i got that out of the way. I recently installed four Legacy 12" 500w L series subs with two UltraLinear Series 2 800w monoblock amps. The problem is, i have the subs hooked up in parallel so that they are 2 ohms on each side wired up, which the amp is supposed to be stable at 2 ohms. But, when i turn them up, the amps kick off and the protection lights come on...i don't get it....and stranger yet, is that they were in my friends car before and hooked up exactly the same, but did just fine. Can anyone offer any advice?? something to try, maybe an obvious solution?

Sean

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[ultimate157 5,000+ posts]

Double check the wiring.

 

[Sean96sx 10+ year member]

i have, everything, at first it was just doin it on the drivers side, but it was because one sub on the pass side was unplugged and the one was pushin 4 ohms...that amp was doin just fine...but then when i hooked it back up, that amp started doin it too

 

[jeeper07 5,000+ posts]

can u get the amp to play at all... on one sub or anything

 

[Sean96sx 10+ year member]

they work just fine when it's turned down...it's when i turn them up, but it's not even half power i don't think. certainly not full power.

 

[Gebrochen 10+ year member]

Describe your wiring system. Sand all paint and everything away from your grounding points. What voltage is the meter on your dash dipping down to?

Bad ground would be my first bet if you otherwise have sufficient wiring.

 

[Audiowerks]

Need a little more info, what's your electrical modifications if any? I suspect big votage drops are kicking it into protect.

 

[Sean96sx 10+ year member]

i've got them hooked to a 1.6f cap that has an 8awg from the battery. no modifications to the car yet. i was watchin the voltage on the cap and it's stayin up, droppin to 12 at the worst, stayin about 13.5-14.2 most of the time. for grounding, the cap and each amp have an 8awg to a screw in the floor.

 

[Sean96sx 10+ year member]

and the car is a 96 Nissan 240sx

 

[L7Fiend]

8 guage for those 2 amps? sounds like you need minimum of 4, probably 0 wouldn't hurt man. Try bigger wires and see what happens.

 

[Sean96sx 10+ year member]

sweet...where's the best place to get some 4 or 0?

 

[Audiowerks]

i've got them hooked to a 1.6f cap that has an 8awg from the battery. no modifications to the car yet. i was watchin the voltage on the cap and it's stayin up, droppin to 12 at the worst, stayin about 13.5-14.2 most of the time. for grounding, the cap and each amp have an 8awg to a screw in the floor.

problem one, ditch the cap.

problem two, what is the voltage reading at the AMP, nothing else matters.

The "Screw in the floor" could also be a problem. try finding a better ground and make sure all paint is sanded down to bare metal when you make a ground as well.

 

[Audiowerks]

sweet...where's the best place to get some 4 or 0?

http://www.knukonceptz.com

 

[Gebrochen 10+ year member]

The cap isn't going to hurt him. I know a lot of people hate caps now, it's just the latest fad to hate them after you used to get points for them. I don't think they are useful for big bass systems, if you wanted to know my opinion.. but anyway. ...

.. are those amps 800W RMS or peak? if that's peak, I'd go minimum of 4 .. if that's 1600W RMS, then 2 or 0. I'm almost thinking that's not going to solve your problem, though.

 

[Sean96sx 10+ year member]

they are 800w RMS, so i need to go with 2 or 0?