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Posted

i have an alpine 15" type r subwoofer and an alpine mrp m1000 amp

the subwoofer is getting 1000 watts rms at 2 ohms and i also have a rockford fosgate 1 farad cap

but my lights still dim and my rpms go down when the bass hits

my local car audio store said i need a new alt but im wondering if theres a cheaper way to go

thanks

97 exploder xlt2 18" obsidian audio daul 2 v2s1 sundown audio saz1500d at .5 ohm2 sets of alpine type r components1 MB quart onyx 125.4alpine cda-98871 mike singer 250 amp altxs d3400 in the backall kicker wiringBIG 3singer resonance killer sound deadner throughout

Posted

Big 3 Upgrade

What Size wire are you running?

and

What condition is the battery in...?

29250959_cd0cc3.jpg

15" Fi BL

Ported 4.0 cu ft.

Sundown 1500d

Full 1/0 Gauge Throughout

Big 3

Posted
Big 3 Upgrade

What Size wire are you running?

and

What condition is the battery in...?

4awg and the battery sat for 4 years

97 exploder xlt2 18" obsidian audio daul 2 v2s1 sundown audio saz1500d at .5 ohm2 sets of alpine type r components1 MB quart onyx 125.4alpine cda-98871 mike singer 250 amp altxs d3400 in the backall kicker wiringBIG 3singer resonance killer sound deadner throughout

Posted

yup big 3 and new bat maybe a 2nd 1

I know a lil about everything so dont call me Mr. Know it All.

Posted

A new battery won't do shit unless your voltage is dropping below ~12.4v

Big 3 might help slightly, but yes, if you don't want ANY dimming, you have to get a new alt.

When will people learn that adding more batteries won't stop dimming? FFS you could have 500 batteries but if you only have a 50A alt then when you pull more than 50A the damn lights will dim!

goodgrammarbc7.gif

10.x volts fo' life!

Posted

i would think a battery that has sat for 4 years wouldn't be keeping a good charge still. I'd test it.

29250959_cd0cc3.jpg

15" Fi BL

Ported 4.0 cu ft.

Sundown 1500d

Full 1/0 Gauge Throughout

Big 3

Posted

that's funny because my Ford Expedition's stock battery has been sitting since June 05 and it still sits at 12.4

2-DC 15XLM2 D.7s

1-DC 5K amp

(1) XS Power D6500(UNDERHOOD) and (1) XS3000(REAR)

3 runs 1/0ga for power and 2 runs of 1/0ga for negative.

(2)-RFT165s components, ...... 4 separate 1 inch tweetersRF T600-2(fronts) Punch 450.4(rear)

Audiocontrol 3.1.

DC power 260amp alternator w/MLA Module

Posted

as I said to the OP, just test it out.

not like it is a extremely hard job.

29250959_cd0cc3.jpg

15" Fi BL

Ported 4.0 cu ft.

Sundown 1500d

Full 1/0 Gauge Throughout

Big 3

Posted
yup big 3 and new bat maybe a 2nd 1

ok thanks i will look into the big 3 and like boon said if it doesnt help i will get a new alt

theanks for all of yalls help

97 exploder xlt2 18" obsidian audio daul 2 v2s1 sundown audio saz1500d at .5 ohm2 sets of alpine type r components1 MB quart onyx 125.4alpine cda-98871 mike singer 250 amp altxs d3400 in the backall kicker wiringBIG 3singer resonance killer sound deadner throughout

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