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Re: stereo (amp wiring) + my Q
I think the reason why people say this is that the battery provides a power
reserve, i.e. it can satisfy a heavy load with relatively little delay.
Audio amps can generate very high transient loads on the power supply, so
the better the power supply can satisfy these demands, the 'cleaner' the
signal that it reproduces will be. Therefore, the fewer points of
resistance between power reserve, i.e. battery, and amp the better. Hence,
it's better to connect directly to the battery. It's not unknown for
domestic hi-fi systems to be run using a big 12v battery which is charged
from the mains and which then connects to a 12VDC to 110/240VAC converter to
give mains voltage supply to the equipment, hence giving a hefty reserve of
power to meet the transients.
If you are using a couple of 300W amps to drive your subs you are looking at
600W (50A) nominal load with transients probably nearer double that, or
more. And that's on top of the background power requirements for fuel pumps,
ignition, etc.
I think that, unless you are installing pretty serious stuff and are
hyper-critical, it won't make any noticeable difference how it's wired,
assuming of course, that the alt to starter to battery wiring is reasonably
sound.
Ewan Hopkins...
'85 Storm 2.0
'86 GT 1.8
'87 GT 1.6
>From: Daniel Brideau <dan@hobbyetc.com>
>To: "Fry, Larry" <LEF@chem-tronics.com>
>CC: alienj@bad-candy.com, scirocco-l@scirocco.org
>Subject: Re: stereo (amp wiring) + my Q
>Date: Thu, 09 Aug 2001 13:36:41 -0400
>
>Larry,
>
>Thanks, he started to ramble about alternators producing aperage and
>batteries producing voltage. This, right away told me his grasp of
>current and potential was lacking.
>
>Since he puts these things together for a living, you gotta figure he
>has some empirical knowledge.
>
>
> -----------------------------------------------
> | | | | |
> + + + + +
> battery starter alternator amplifier lights
> - - - - -
> | | | | |
> -----------------------------------------------
>
>
>
>
>
>
> > "Fry, Larry" wrote:
> >
> > Hmmm. Can't come up with a good reason why this would be different
> > than going directly to the battery, since going directly to the
> > battery also connects (albeit indirectly) you to the alternator. Ask
> > the dude. Bet he says something about alternator noise, and if the
> > above is true, "noise" would be a bogus reason.
> >
> > Keep us informed....and
> >
> > enjoy the ride
> > Larry
> > sandiego16V
> >
> > -----Original Message-----
> > From: Daniel Brideau [mailto:dan@hobbyetc.com]
> > Sent: Thursday, August 09, 2001 9:04 AM
> > To: alienj@bad-candy.com; scirocco-l@scirocco.org
> > Subject: Re: stereo (amp wiring) + my Q
> >
> > I just put such a wire in my car. I made a hole on the passenger side
> > of the
> > firewall (USA).
> >
> > On my car, the AC plumbing was the only thing there, and I could reach
> > easily
> > under the dash. From there, The wire goes behind the center console,
> > past the
> > shifter and hand brake lever and into the rear.
> >
> > I chose this route since the carpet was already loose there.
> >
> > My question: I connected this big red wire to the big red wire on the
> >
> > alternator. I did this since it was closer, and that wire goes
> > straight to the
> > battery (making a pit stop at the starter)
> >
> > The dude at the stereo shop said this was bad. Why?
> >
> > Dan Brideau
> > http://www.type53.com/
> >
> > ----- Original Message -----
> > From: "fryer" <alienj@bad-candy.com>
> > To: <scirocco-l@scirocco.org>
> > Sent: Thursday, August 09, 2001 10:41 AM
> > Subject: stereo (amp wiring)
> >
> > > alright, i know that somewhere out there someones got a kickin
> > system. a
> > question for you. i have large gauge power wire for my amp (2 or 4
> > gauge), where
> > should i run it through? or should i just drill a new hole somewhere.
> > thanks.
> > > please stay tuned for additional random questions as i race to
> > finnish my
> > rocco before school starts.
> > > chris fryer
> > > 85 8v wolfsburg rocco
> > > 87 vanagon syncro gl
> > >
> > >
> > > _________________________________________________________
> > > Get your own FREE Bad-Candy.com Email account at...
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> > > http://Bad-Candy.com - Eating candy not for pleasure but for
> > science.
> > > _________________________________________________________
> > >
> > >
> > >
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