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Re: stereo (amp wiring) + my Q



i have an mtx 5400x amplifer.  this is a 5 channel 800 watt amp.  i am not
using all the channels and the gain is not turned all the way up but I am
running two 10's about 260 watts each and then 2   5 1/4  polks about 50
watts each.  the amp its self has 3 30 watt fuses built in for the output i
believe.   i did wire the 4 gauge wire directly to my battery with a forty
amp fuse in line and have not had any charging problems nor has the 40 amp
fuse ever blown, but your alternator does have a voltage regulator so there
should not be any spikes in voltage and like Ewan said as long as the wiring
to the battery from the alterantor is good that should smooth over any
sudden increases in amperage that the amp requires.  I have a 90 amp
alternator and I have had this for 6 months in my current car.   I ran the
wire on the driver side behind the fuse block through an existing grommet.

good luck


Robert Piwonka
8616V

----- Original Message -----
From: Ewan Hopkins <ewanhopkins@hotmail.com>
To: <dan@hobbyetc.com>; <LEF@chem-tronics.com>
Cc: <alienj@bad-candy.com>; <scirocco-l@scirocco.org>
Sent: Thursday, August 09, 2001 1:35 PM
Subject: 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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