Low voltage

[pimpdaddy1787 1]

Ok. So I put the zcon's and the 2500d in. Now when I set the gain using the dd1 till I can get ahold of my friend with the oscope, the voltage goes down to 12.5. I have a mechman 270, big 3 in 0 gauge, ran the pos and neg from front to rear batt in 0 gauge, installed fuse in front, fuse in rear, soldered all connections. Rear batt is a diehard platinum 31m marine agm with 205 reserve, but yet when I turn volume up to around 30 out of 35, amp goes into protect mode and volts drop to 12.5. (Radio was o scoped at 40hz and 1k hz and had no clipping evident)Even at 1500 rpm. Am I missing something or is the saz2500d drawing that much amperage? Also speaker wire was 14 gauge. Also ran out of 0gauge so from rear batt to amp was 4 gauge till tomm when I can get some more 0gauge.

[16K 159]

12.5 isnt even that low so the amp shouldnt be going into protect cause of that....

4g to the amp ??? im betting thats the problem.... 2500w should be atleast 1/0g

also how good is the ground and how long is it ?? could be the issue but im betting the 4g to the amp is your prob

Edited May 28, 2012 by 16K

[jonbearsmt 919]

well that 4 gauge can cause issues.

[pimpdaddy1787 1]

I was thinking that. Should I ground the amp where it is mounted? The current ground wire is about 4 foot long. From batt to amp. Should I ground the batt to the frame and the amp to the frame also? Is this the problem with the low voltage? Sorry for all the questions but I'm learning and trying to do it right the first time. Thanks for all the help

[16K 159]

I was thinking that. Should I ground the amp where it is mounted? The current ground wire is about 4 foot long. From batt to amp. Should I ground the batt to the frame and the amp to the frame also? Is this the problem with the low voltage? Sorry for all the questions but I'm learning and trying to do it right the first time. Thanks for all the help

if that would make the ground shorter then yes i would mount it to the frame..... 4 feet for a ground is a little long imo...i like them to be under 2 feet....

is it gonna help with voltage.... who knows until u try

Edited May 28, 2012 by 16K

[pimpdaddy1787 1]

Ok. Thanks for the help. I'm goin to get some more 0gauge and re do the ground and also the positive. Should I ground the batt in the back to the frame also?

[16K 159]

Should I ground the batt in the back to the frame also?

yes lol that could be the problem as well..

Edited May 28, 2012 by 16K

[pimpdaddy1787 1]

Ok, so I got an urge. Can't resist actually. Went to garage and pulled box out. Whew what a chore by yourself with 2 zcon's. Shortened amp ground to 2 foot. While I had the box out I pulled subs to double check wiring. Just didn't seem to much louder than the other kickers. After grabbing iPad to look at previous post where someone(can't remember but thanks) put the correct wiring diagram in and whala. Had them wired wrong. Wired correctly and reinstalled. Had to test out even though it's 11:30pm. Whoa. What a difference. My eyes hurt bad and my knees where rattling. Omg is all I can say about the z's. And the voltage came up to 12.7-8. I reset the gain with my dd1 and can now put back up where originally was. Before I had to lower to stop protect from coming on. Thanks for all the help and can't wait to get more 0gauge. Now I'm really addicted and want more! Thinking about another 2500d and another battery!!!!!

[bassahaulic 155]

So you got all 1/0 wiring now?

[pimpdaddy1787 1]

No. Still have 4gauge from rear batt to amp :-(. Fixing that hopefully today.

[shizzzon 461]

yea i was gonna say 4awg wire is fine if it's short.

at 4ft long, 4 awg can handle up to 295A @5% voltage drop per NEC standard.

I used to use 4 runs of 4 awg 18" long per run and pull 1100A of current on quick burps. Never effected my score.

Thanks to MECA for making me run funky size cables so i started making my own blocks, etc at that point.

[pimpdaddy1787 1]

Whew hew. Thanks for all the help everybody! Got another 15 foot of 0 gauge today. Just got done runnin 0 from back batt+ 26" to amp, gotta get another fuse. 0 from back batt - 12" to frame. Turned amp 180° so power at end near batt. Ran 0 from amp - 12" to frame. Screwed platforms 2" on back of box and 6" on front to level box and give me an additional 1" of Clarence above amp. Drove and got up to 26 with voltage only going to 13.8-9. Never got to this before. Couldn't put windows down because of storm goin on right now, but I can tell its already way better. Thanks again. Now just gotta brace, brace, brace.