Masterbasser Posted August 22, 2015 Report Share Posted August 22, 2015 I reconed a subwoofer from dual 2 ohm to dual 1.4, so its wired down to .7 on a atomic 5000.1d. I am gettn some pretty gnarly voltage drop atm was curious if something might be wrong I am running a mechman 320 amp hairpin alt and just a stock fleet farm battery and i am getting voltage drop at 2k engine rpm from 15 volts to 12.5. with headlights on they dim incredibly. was looking for some input from other guys running 5k amplifiers and what kind of drop they get Kenwood excelon ddx795 3 370 amp CES alternators (audio side only) McLaren dome tweeters Crescendo 6.5 ultra neos NVX JAD800.4 4 PA x4 SPL 18's 4 Digital Designs m5's at .7 ohms each 2 K2 80 ah lithiums 3 group 31 agms Ledglow million color (12 piece) 2007 Yukon xl Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted August 22, 2015 Report Share Posted August 22, 2015 You have no reserve, so yes, you are going to drop hard. Once you pull more than ~320a worth or ~4000watts of power out of that amp, you are going to battery power which is why you are dropping. Once your alt is maxed out, the rest of the draw essentially is on the back of you batteries to carry until the alt can catch back up. If you had one or two solid batteries for a rear reserve, or even swapped your stock for a better AGM, you would see improvement. But at a minimum, I would add 1 rear group 31 AGM, whether it be northstar, XS, shuriken, etc. And I bet you would be 13.0v + @ 2krpm Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
Kyblack76 Posted August 22, 2015 Report Share Posted August 22, 2015 ^^^^ word... you need some added backing. The drop your probably seeing is the alt not being fast enough to supply on the quick pull the amp is demanding. Add reserve with cells, or caps. youll see large gains. SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
Masterbasser Posted August 22, 2015 Author Report Share Posted August 22, 2015 was thinkin gettin a g31 in place of the stock and a bank of the xs power or maxwell caps. i figured it was reserve but wanted to know what others thought Kenwood excelon ddx795 3 370 amp CES alternators (audio side only) McLaren dome tweeters Crescendo 6.5 ultra neos NVX JAD800.4 4 PA x4 SPL 18's 4 Digital Designs m5's at .7 ohms each 2 K2 80 ah lithiums 3 group 31 agms Ledglow million color (12 piece) 2007 Yukon xl Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted August 22, 2015 Report Share Posted August 22, 2015 I had a 5k @ .7 with a 200a alt a couple years ago, but had 6 batteries on it and dropped to 13.5v at idle full tilt. Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
Karkov Posted August 22, 2015 Report Share Posted August 22, 2015 2 SQ 3500's newest version 4300+ watts each, DC Power 370XP hairpin, XS D4800, XS D3400, 2 XS D3100, 6 XS XP3000, drops into 13's easily all the time (14.9 hot charge) but at very low 13's I hit battery resting and it's very solid then and doesn't go below that. When I had Mechman 370 Elite hairpin and 2 RF T2500-1bdcp's it was the same deal, low 13's and it held like a rock because of battery resting and 10 XS Power batts. I also usually have around 3 mids/highs amps as well. If you have a big enough battery bank then when alt can't keep up it will help to not allow amp to see too low of voltage, cushion. 12's aren't too bad but if your lights are dimming and that's all you got for batt. bank now then I would up your batt. bank just a tad. 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.