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my big 3

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=90687
Printed Date: May 05, 2024 at 12:49 PM


Topic: my big 3

Posted By: jmelton86
Subject: my big 3
Date Posted: February 19, 2007 at 9:42 PM

I first started by adding a yellowtop, thinking that's all I needed. I then learned that the yellowtop could only hold as much 'reserve' (I guess) that the smaller one up front was capable of holding, so I got another yellowtop and put it in the engine compartment. - My headlights still dimmed - I then came across a good deal on a 1 farad digital-display capacitor, for a pair set of cheap Jensen tweeters. I installed the cap. - Lights still kindof dimmed. Wasn't till' recently that I learned about both the Big 3 Upgrade and the importance of the B.3.U. I just did my Big 3 the other day and boy, what a difference it still made even though I did 'everything else'. I technically don't have enough farads for my 2000w max system. My headlights still barely dim on real-low notes, but I should expect that considering I've still got my 105 amp factory alternator with a 102.5 max amp. draw audio system.

So advice to fellow newbies; do the Big 3 before even adding one aftermarket amp.




Replies:

Posted By: aznboi3644
Date Posted: February 19, 2007 at 11:57 PM
First word of advice...sell the capacitor. It doesn't help but for voltage fluctuactions of .1 volt. Caps are crap that companies make to get your money. They won't work

What amp do you have?? How is it wired??

What size is your power wire??

How did you ground the amp??

What gauge wire did you upgrade your big three with??

Peak and Max ratings don't really mean anything...most of the time they are overinflated anyways. RMS or Continuous power is the real power of your system




Posted By: jmelton86
Date Posted: February 20, 2007 at 12:47 AM

Caps really aren't worth it? It would be better to just sell it? I did the Big 3 with 8g. I have 4g from the front battery to the rear one. 8g from amps to rear battery(+ and -). 4g ground from rear battery to seatbelt bolt. I am about to upgrade rear battery ground to 1g.

My Music Reproducer:

HU= Alpine CDA-9830 (cooling fan, HP/LP)All I need

Fr. Stage= Alpine 3/4" tweeters(from HU's Fr. channels), SoundStorm 4x6's(from HU's Rr. channels)

Rr. Stage= -From front outputs- ClarionPro APA2104 on 2 Lanzar 61/2" and 2 Jensen 6x9" (2Ohms Stereo)

                -From rear outputs- Alpine 7 band EQ [(30w by 2) I forgot model #] on Jensen 3/4" tweeters

Bass= -From sub ouput- Lanzar Vibe241 bridged 2Ohms (I know, it is a tough one, and I'm waiting for it to blow) on 2 10" KickerComp(not VR)

         -From Lanzar output- Jensen JPA285 bridged 4Ohms on 1 12" RockfordFosgate Punch1



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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: jmelton86
Date Posted: February 20, 2007 at 1:13 AM

Corrections:

The rear output is actually going to the APA2104. The front to the Alpine EQ. The EQ, model# ERE-G160, actually has 9 bands.

I have all amps face-up, getting plenty of air but still know that having the LanzarVibe241 wired bridged 2Ohms will eventually blow, how else could I get similar output wiring it stereo 4Ohms(1 side to each KickerComp 10) other than by turning up the bassboost on the Lanzar. I don't want to turn that up b/c it's at 60hz. I like the 40hz boost from the HU. I have both sub-amps full range b/c I've got a 80hz crossover on the HU. I would have to turn them on LP in order to use the bassboosts which would require more turning on the LP x-over on the amps. Any Sugg's? Thanx



-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: kirktcashalini
Date Posted: February 20, 2007 at 9:28 AM
A Charging systems only as powerful as its weakest link. Dont bother upgrading a single ground wire to 0 gauge until you beef up those 8 gauge big 3 wires. You even said how much of a difference it made, in reality the Big 3 wires should be NO LESS than 4 gauge. Either way, Im glad it worked out.

and yeah... trash the cap. ebay it and spend that money on some beefier wire haha.

-------------
99 Blazer LT.   Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)




Posted By: jmelton86
Date Posted: February 20, 2007 at 7:05 PM
So the power the cap is using to light up the voltage display is making up for how much it is really using- basically?

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: jmelton86
Date Posted: February 20, 2007 at 7:07 PM
Correction '-for how much it is really producing or storing?- basically?'

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: kirktcashalini
Date Posted: February 20, 2007 at 8:19 PM
not really... The cap doesnt "produce" any power at all... the only thing that produces power is your alternator. that is why it is vital that the wires connecting everything are good enough to supply as much current as possible to everything. (the big 3 especially).

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99 Blazer LT.   Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)




Posted By: jmelton86
Date Posted: February 20, 2007 at 8:59 PM
I'm at work and I just got done shrink-wrapping over my crimp connectors on my new 4g wire for my alt. - to - battery. I work at Napa so the supplies are almost endless. Even though they are all basic connectors and nothing gold-plated or anything, the fact I'm using audio-grade cables, it should be alright. The 8g I had there works but I might as well do it right. It outta do the trick. I left the factory charging wire there. I also left the factory grounds(8g ?) there and just added the 8g cables to the existing locations. I could probably leave the factory grounds there along with the 8g I added and it should be fine along with the alt. to bat. wire. The bigger the ground (as long as power wires are of correct size), the better, right?

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: aznboi3644
Date Posted: February 20, 2007 at 11:33 PM
I would do anything smaller than 4 gauge for the big three...and get rid of that seat bolt ground...that is a bad ground...find a clean spot...dril a hole, sand away all paint and use a nut and a bolt.

bigger the wire the better

Realistically...you system is about 450-500 real watts maybe. Not saying this is bad but saying you have a 2000 watt system is wrong.




Posted By: jmelton86
Date Posted: February 21, 2007 at 12:04 AM

Just got done swapping in the 4g for the 8g on a quick 30 min. break. I started the car up and noticed the voltage display on the cap. read 14.7 - .8 instead of the usual 15 at idle. Lights on, no difference. Didn't turn the music on. Ran down the road about a 1/2 mile then back. The gauge still read 14.7. If I ditched the cap., then grounded the rear bat. better, then re-ran all my power wires -I could cut out like 3-4ft. from the front bat. to the rear one-, then everything would perform radically better and more efficiently? I would still like to have a voltage display for quick diagnosis -more like to have some sort of lights back there... -or would an amperage display be better for quick diag., of possible.?



-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: aznboi3644
Date Posted: February 21, 2007 at 12:27 AM
With my experience with caps...Not in my cars but friends systems.

Most caps out there with digital voltage displays have a flase voltage reading...in my experience the cap's display voltage is between .2 - .5 volts HIGHER than the actual voltage. My guess...manufactures ploy to make you think you have more voltage than you think





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