Extra battery or Replace Battery (need help)

[Repo503]

that was an epic post.

 

[tahoe02]

i turned down the gain and now it doesnt dim the lights that much but still a lil bit when i turn the sw up

 

[rigo_jones]

Eagle u the man. thanks for the info, im probably going with a bigger alternator. big ending with the GI Joe video lol.

 

[ROBERTOcritser]

so your sayin my amp is bad, maybe? also I still havent found out what the Big 3 upgrade is....

 

[Eagle]

well , ican;t say brother. that is the problem. I can point out some checks for you to do, and If it were here, I could figure it out in about 20 minutes.

I don't even know what amp you have to state, 'yeah, that one has insufficient capacitance' or what size wiring you have used (hopefully 2ga or 0 ga.)


big 3:

upgrading the wire from the alternator to the battery, battery to ground and engine block to ground. (note that he second one isn;t even IN the amp's electron flow path).

 

[Young28]

he has a jl 1000 1 v1. stated in his first post. IIRC the 1000 / 1 only does 4 ga wire
btw you are full of good info.

 

[Eagle]

ok, here is a question then, & sorry for missing that key info previously. the slash series are current hungry mothers... always have been.
If you have 2 0hm subs, or DVC 4 ohm subs it might be wired to a 1 ohm load instead of 4 ohm. That would CERTAINLY cause an increase in current consumption as it would be very very inefficient.
like wise if it were wired to 8 ohms instead of 2 ohms, you;d be running excessive gain to make up for the <correct> lack of output.

What is the impedence being presented to the amp?

8 ohm? 6 ohm? 4ohm? 3ohm? 2 ohm? 1ohm? 0.5 ohm (DMM across the two wires while NOT connected to the amp)

remember the 1000 1 is only 1.5 ohm stable at best (and 4 ohm is far better, while 2 ohm is also just fine). The RIPS technology means they are current hungry mother-funkers...
That is the price you pay for not having to worry (as much) about impedance matching.

 

[ROBERTOcritser]

I cant find the delete for a post. haha

 

[Eagle]

NO problem...

are you sure you have "REAL" 4 ga and not 6 ga in a 4ga sheath? There is a LOT of that going around?

Single 12w7? or two? Single you should be fine...

 

[ROBERTOcritser]

single W7 it should be wired straight from the factory which I think is either 1.5 ohms or 3 but Im really not sure what ohm load its at right now but Ill try to find out for sure. and it should be true 4ga. I really cant be sure myself but Im very close to getting 0ga wiring kit. I know the 1000/1 only takes 4ga but thats something else I wanted to ask you about.... the car audio store Ive been talkin to says you can make 0ga go down to 4ga.... its a big Memphis 0ga wiring kit with all kinds of stuff (17ft 0awg wire, RCA's and some weird blocks... they said they were I think distribution blocks and something that makes 0awg funnel down to 4awg and some other weird blocks) I guess it is possible to use 0awg wire on a 4awg hole isnt it?

BTW I kinda wish I did have 2 W7's haha but that would be pretty overkill. I'm really trying to get this straightened out so I can put another amp in there for my high's and I really dont wanna run door speakers that dont require an amp cuz I think they will get better sound. Plus Ive already bought a pair JL C2 6.5's to go up front. I just wanna get this figured out before I start puttin more of a load on my system.

lastly, I kinda plan on having pretty much everything JL cuz from what Ive experienced, I think they have great products, even if it is pricey. I feel I can trust whatever else they make. (If they made a deck, Id prolly end up getting it haha)

 

[Eagle]

sometimes... there are 0 -> 4 ga adapters.
however generally they are too big to fit one next to the other, so you'd need to keep a 4 ga ground (not a real problem since ground is probably only 12-18 inches.)

you might try upgrading the alternator to battery to 4ga first... can't hurt, and it would sure cost less.
if your plans involve adding another amp, then a 1/0 gauge kit is a good investment.

 

[ROBERTOcritser]

I actually got a piece of 8ga wire to add on top of the wire for the alternator to battery... would that be ok or should I just go straight to 4ga?

about the 1/0 kit, thats all I needed to hear... I might buy one this week.

 

[fatnlowtahoe504]

yea thos 1000.1s pull alot of juice, i had one at first with just the factory battery it dimmed like a mother, but i added a yellow top and capacitor and it solved the problem, now im running a kicker 1500.1 and it doesnt make it dim nearly as much as the JL

 

[ROBERTOcritser]

I just checked my sub with a meter and from what I can tell, Im fairly certain its at 1.5 ohms. the meter I was using wasnt a big yellow one like most people have and isnt extremely precise but it only flickered between 1 and 2 ohms so I would guess its at 1.5

 

[Eagle]

I figured it was a DVC 3 ohm parallel.

Add that 8 ga. to the alternator & see how it goes. 8ga + OEM wiring should be more than ample.

 

[ROBERTOcritser]

the JL site says its Nominal Impedance is 3 ohm. Here is a chart copied from there site.

Free Air Resonance (Fs): 27.2 Hz
Electrical “Q” (Qes): 0.514
Mechanical “Q” (Qms): 7.807
Total Speaker “Q” (Qts): 0.482
Equivalent Compliance (Vas): 2.33 cu. ft. / 66.0 liters
One-Way, Linear Excursion (Xmax)*: 1.15 in. / 29 mm
Reference Efficiency (no): 0.249%
Efficiency (1W/1m)**: 86.2 dB SPL
Effective Piston Area (Sd): 84 sq. in. / 0.0542 sq. m.
DC Resistance (Re): 2.47 ohm
Nominal Impedance (Znom): 3 ohm
Thermal Power Handling (Pt): 1000W
Driver Displacement: 0.14 cu. ft. / 4.0 liters
Net Weight: 45 lbs. / 20.4 kg

 

[Eagle]

and 3+3 = 1.5 (nom).

 

[ROBERTOcritser]

ok. well I just put that 8awg wire between my alt. and battery and Ive noticed pretty good difference in how much less voltage drop Im getting.Right now I have

1.extra 8awg between alt and battery (small red box)
2.a 4awg wire ran from my battery ground to a random body ground nearby
3.and my amp's 4awg wired straight to the red box

number 2 might sound a little off but Im pretty sure it helped even if only a lil bit.

with all of this, Ive noticed a not huge but a very good difference compared to how it was before any of that extra wiring. Definitely dont feel like I need a big battery like the one they wanted to sell me. but Im not sure what to do yet b/c I still gotta put the other amp in there with my high's and see how much that draws from everything.

 

[Eagle]

luckily, 'highs' jsut dont require the same brute amount of power.

 

[ROBERTOcritser]

yea but what would you think if I added a JL 300/2?