wester399

Hey guys havent been on in a while. But i just got my subs installed in my truck. 2 alpine type x 10's each powerd by an alpine pdx 1.1000. I keep tripping the safety circuit on my amps when i reach around volume 25 on my deck which really sucks. I have them wired to 2 ohms but im starting to think that the amps even tho they state they are 2 ohm stable aren't. My other option is an 8 ohm wiring which i belive with dual 4 ohm voice coils will end up giving me a 4 ohm load right. Anyways the guys on dodge ram forum figure i just need a cap because the amps arent getting enough power.
Any suggestions ...i plan to do the big 3 soon and already use a yellow top.

bass_4_ever

is your amp getting hot? maybe its turned up too much... maybe you need more power to your amp (i.e. another battery)... could be a lot of things. I'd first start at your amp, the gains may be set way too high and its being clipped which is making the amp heat up

wester399

Its definatley not overheating and my gains are not set too high either. my guess is im not getting enough power.

jstoner22

iTrader: (1)

are they the newest generation PDX?


the first gen had alot of issues popping fuses and going into protect when under 2ohm load. they were very picky with the impedance.

also, ensure the sensitivity switch is properly set. the gain may be much higher than you think if its on 0.1-1V rather than 1-8V.

a cap is just going to be a bigger drain on the system. its only going to be beneficial if your electrical is already up to par.

regardless of whether or not power is the issue, do the big 3 and reduce the strain on the system. it will do nothing but help.

wester399

http://support.alpine-usa.com/produc..._SWX-1043D.PDF
Theres the link which includes wiring. I guess my next option is turning gains down and possibly doing the 8 ohm set up? what is going to be the main difference at a 8ohms compared to 2? It is the older version of the pdx and i have heard that aswell.

BigRedGuy

iTrader: (11)

What size power and ground are you using?

Minimum for those amps is 4ga each, preferably off a run of at least 2ga from the battery to a distro block by the amps.

HTH

Taco

It really sounds like it is impedance protection. Those PDX amps are tough, I had a similar issue with a PDX5 that was protecting when the volume would hit a little above moderate levels.

I would say double check your impedance disconnected from the amp, remembering to take the relative out of the DMM leads. If that checks out then put your meter on the power in and have someone turn it up until it cuts out and makesure that it isn't going into under voltage protect.

wester399

Tomorrow im going to double check my wiring and try another option. I already run 1/0 from a yellow top to the distribution block and then 4 ga to the amps. I did have light dimming pretty bad so power at high levels is an issue aswell id like to add a 3rd amp. So what im thinking is big 3 for sure and a second battery to start. What do you guys think about just a high out put alt and big 3 which way would be best. My ram has a 100amp alternator if im not mistaken with 8 gauge charge and grounds (soon to be 1/0)

Sinemeup

Back up to post one it says you have 2 subs, that are dual 4 ohm coils (IIRC the x's only came in dual 4's) which could only give you a load of 1/4/10/16 ohms with both subs hooked to the amp... the first one would be a load lower than 2 ohm... if you haven't got one, go buy a $10 multimeter that can read resistance and take out all this guess work, maybe you've got it wired to 1 ohm

wester399

both subs have their own amp man ...im just dropping voltage at high levels so im going to do the big 3 and add a h/o alternator then possibly if needed a bat cap.