Bodyjar
Oct 8 2002, 06:07 PM
Ok... I went to a battery store today, and the guy there (40 years in battery business) said that buying a fancy battery would be a waste of time! he was a bit rude, but reckons I would only need basically a standard $100 battery for my application, ie - about 100amp draw for SPL burps... Is he right? I mean, why have I always been told to get nice big batt that will have big cca and a/hr?
I told him i already had a Delkor (which he sells) that does 8** cca and 90a/hr and he said no need, just get one of these (points to no name everyday batt, 300cca)! so whats doing? Have I been under a dream for the past year? or has this guy no idea?
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System Includes:
Pioneer DLS HERTZ XTANT Phoenix Gold
www.members.sounddomain.com/bodyjar
1st Place, Drag Combat 2002, 1 Woofer class
Andu
Oct 8 2002, 06:28 PM
He probably has an idea about batteries but doesn't know much about the application, being car audio and how critical voltage stability is to an amp in competition circumstances. Sure the scummy little battery will put out 100A but with how much voltage drop... with bigger/multiple batteries all your aiming for is less voltage drop.
Or maybe he just doesn't stock expensive batteries
edit: damn skim reading... he does stock the better batteries
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Car: '90 Nissan Pintara (sedan)
Headunit: JVC KD-SX750
Fronts: TotalRecoil Carsplit.6
Frontamp: Alpine MRV-T301
Sub: 2x Alpine SWR-1240D
Subamp: Lanzar VPro 2000D
SPL: 145.4db (Doran Test Day - 29/09/02)
"If its not quick, may aswell make it slower"[Edited 1 time by Andu on 08 October 2002 at 16:30]
Man most Auto-Sparkies and Batteries Dudes have N.F.I.
I once said I needed cable that can flow 500A for my stereo and they laughed at me!
Any normal battery will drop 1V or more with just 50A draw.
The bigger you go the lower the drop. This means more SPL everytime.
AJ
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Owner of SPL King 2001, Hot4s Issue 81 Feature Honda Civic.
160.8dB from 2xMTX 1000Ds and 4xMTX T8000 15"s
Visit: INCAR Audiomotive
Bodyjar
Oct 8 2002, 10:02 PM
Yeah thats what I was thinking as I walked out of the store... Just checking
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System Includes:
Pioneer DLS HERTZ XTANT Phoenix Gold
www.members.sounddomain.com/bodyjar
1st Place, Drag Combat 2002, 1 Woofer class
KraSE
Oct 8 2002, 10:44 PM
well speaking of ppl I was told that any ANL fuse over 80amps needed to be put on special order cos i asked for one around 200-250 i was like WTF and headed to jaycar and found a 100amp one tha did do for now(i previously rang up jaycar and they said they didn't have one at all) it is hard to do things somtimes and some ppl don't help
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Team Tycoon - Dollars n dB's
a little Beyond Audio and a little Power = BUUURRRRP
StiffCompetitor
Oct 20 2002, 08:19 PM
Hi BodyJar,
Regarding batteries... if running 4 amps is it best 2 run 4*12volt batteries or 4*8volt batteries in series .. What is your opinion? and what brands of subs are rated for the best power handling...
Cheers
Andu
Oct 20 2002, 08:43 PM
QUOTE
Originally posted by StiffCompetitor:
is it best 2 run 4*12volt batteries or 4*8volt batteries in series ..
So you want to know if its better to run a 48V system or 36V system?
advance
Oct 20 2002, 08:48 PM
batteries must be run in parallel to keep their same voltage.
when running in series, the voltage adds. (eg 12v in series with another 12v =24v system.)
Advenjah
Oct 20 2002, 10:24 PM
4x8=36?????????
not last time I checked.
sorry easy mistake
Walkinshaw
Oct 20 2002, 10:28 PM
i think he is asking wether to have
4x12v in paralell
or
2x8v in series............in paralell with another 2x8v in series, thus creating a 16v system.
[ October 20, 2002, 20:30: Message edited by: Walkinshaw ]
DD Phil
Oct 20 2002, 11:15 PM
Most amps won't take two 8 volt batteries.
We normally go a 6V and an 8V, this 14V setup floats around 15.8V, whereas two 8V float over 17.5V which causes most unmodified amps to shut down.
Unless of course they're designed with this voltage in mind (cough *DD*) LOL
Phil
Andu
Oct 21 2002, 01:02 PM
I haven't had any experience with multiple batt or big volt systems but I would imagine for 4 amps 4 12V batts in parallel would be better then 4 8V batts in series/parallel because the 12V system would have twice the current available to the amps. Higher voltage may be of little use without the extra current to back them up.
the[K]id
Oct 22 2002, 02:03 AM
It depends
not all batteries are created equal, so you can have 2 8's in series with more current flow than 4 12's in parallel
StiffCompetitor
Oct 22 2002, 02:12 AM
Thanks Everyone regarding my question...... I think I understand the differentces....
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