mattp Posted August 28, 2011 Report Share Posted August 28, 2011 Ok, I got a DC power 270sp with a yellow top up front. Big 3 done in 1/0 Two runs of + and two runs of - to back batts. (Two 9a31 and one hc2000) two grounds in back. two runs of + & - 1/0 going to the amp. ( Memphis MoJo 4kw old model) Volts drop to high 11's low 12's..... What the "f" is I doing wrong??? PLZ HELP Amp is wired to 1ohm Quote TEAM DC AUDIO 1999 Tahoe HU-Clarion flip out & Clarion EQS746 Mids/Highs Amp-MB QUART ONX4.125 Mids/Highs- Undecided Sub Amp-DC Audio 7.5 Subs-4x DC Audio xl 18s Alt- 270sp & 250sp Dc Power Big 3 1/0 http://dcaudio.us/ SPL-LAB sells rep. for IOWA http://spllabusa.proboards.com/ Link to comment Share on other sites More sharing options...
tonedeaf Posted August 28, 2011 Report Share Posted August 28, 2011 IIRC these amps can pull like 600 amps of current each...not very efficient amps. 4k watts is no joke, but your electrical should probably keep up...id say your problem is amp efficiency mainly. Quote Link to comment Share on other sites More sharing options...
homiewes Posted August 28, 2011 Report Share Posted August 28, 2011 Or maybe your alt isnt charging right? Quote My youtube channel, please subscribehttp://www.youtube.com/ballinblaza Link to comment Share on other sites More sharing options...
tonedeaf Posted August 28, 2011 Report Share Posted August 28, 2011 What are you resting at? You could also have a bad cell in one of your batteries causing your bank to drop hella low. Quote Link to comment Share on other sites More sharing options...
mattp Posted August 28, 2011 Author Report Share Posted August 28, 2011 IIRC these amps can pull like 600 amps of current each...not very efficient amps. 4k watts is no joke, but your electrical should probably keep up...id say your problem is amp efficiency mainly. I know the amps are not very efficient,but F&*k. So how much electrical do one needs.. I was planning on running two of the Amps, at .67 each I'm going to need a lot more electrical. Quote TEAM DC AUDIO 1999 Tahoe HU-Clarion flip out & Clarion EQS746 Mids/Highs Amp-MB QUART ONX4.125 Mids/Highs- Undecided Sub Amp-DC Audio 7.5 Subs-4x DC Audio xl 18s Alt- 270sp & 250sp Dc Power Big 3 1/0 http://dcaudio.us/ SPL-LAB sells rep. for IOWA http://spllabusa.proboards.com/ Link to comment Share on other sites More sharing options...
mattp Posted August 28, 2011 Author Report Share Posted August 28, 2011 the 9a31 rest at 12.7/12.8 and the hc2000 and rest at 13 Quote TEAM DC AUDIO 1999 Tahoe HU-Clarion flip out & Clarion EQS746 Mids/Highs Amp-MB QUART ONX4.125 Mids/Highs- Undecided Sub Amp-DC Audio 7.5 Subs-4x DC Audio xl 18s Alt- 270sp & 250sp Dc Power Big 3 1/0 http://dcaudio.us/ SPL-LAB sells rep. for IOWA http://spllabusa.proboards.com/ Link to comment Share on other sites More sharing options...
Autruche Posted August 28, 2011 Report Share Posted August 28, 2011 Does this happen when driving around? The alternator puts out about 180 at idle, so if you aren't giving it the beans a bit then you won't be getting your full 270 out of it. Also, check your alternator, is there any black soot around the pulley on it? your belt could be slipping. Quote Need Test Tones/Sine Waves? Click Here!My Saab 9000 build1993 Saab 9000 Aero 5spdPioneer - Zapco - Hifonics - Sundown Audio - O2 Audio - RE AudioJust Say No To Rear SpeakersJust Say No To CCA WireReal Men Drive StickHit me up on Facebook, if you want Link to comment Share on other sites More sharing options...
mattp Posted August 28, 2011 Author Report Share Posted August 28, 2011 Does this happen when driving around? The alternator puts out about 180 at idle, so if you aren't giving it the beans a bit then you won't be getting your full 270 out of it. Also, check your alternator, is there any black soot around the pulley on it? your belt could be slipping. yes it is when driving around,I'll check the pulley. Quote TEAM DC AUDIO 1999 Tahoe HU-Clarion flip out & Clarion EQS746 Mids/Highs Amp-MB QUART ONX4.125 Mids/Highs- Undecided Sub Amp-DC Audio 7.5 Subs-4x DC Audio xl 18s Alt- 270sp & 250sp Dc Power Big 3 1/0 http://dcaudio.us/ SPL-LAB sells rep. for IOWA http://spllabusa.proboards.com/ Link to comment Share on other sites More sharing options...
tonedeaf Posted August 28, 2011 Report Share Posted August 28, 2011 ^^ That too. What about with the car on? You may want to try removing one battery from the bank at a time (still having two connected counting front) and see if you still have the issue, or if it gets better at all, or have all your batteries checked by autozone or the likes. But as I said..3 batteries isnt a lot. You have maybe 180 @ idle amperage. Then you have say 50 amps from the car. So your system from the alt is only seeing 130 amps...your batteries have to make up the difference. Three batteries wont make up for that 4-500 amps of power. Quote Link to comment Share on other sites More sharing options...
mattp Posted August 28, 2011 Author Report Share Posted August 28, 2011 ok so more batts and maybe another alt. I was starting to think I had bad grounds, but I've Checked them time and time again. how many batts. should i have? think two more will cut it Quote TEAM DC AUDIO 1999 Tahoe HU-Clarion flip out & Clarion EQS746 Mids/Highs Amp-MB QUART ONX4.125 Mids/Highs- Undecided Sub Amp-DC Audio 7.5 Subs-4x DC Audio xl 18s Alt- 270sp & 250sp Dc Power Big 3 1/0 http://dcaudio.us/ SPL-LAB sells rep. for IOWA http://spllabusa.proboards.com/ Link to comment Share on other sites More sharing options...
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