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Old May 12th 09, 11:18 PM posted to rec.boats.electronics
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Default Boat Stereo / Amp

I'm adding an AMP to my stereo system, should the POWER/12V wire go to the
SWITCH or should it go directly to the Battery positive?


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Old May 13th 09, 01:32 AM posted to rec.boats.electronics
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Default Boat Stereo / Amp

On Tue, 12 May 2009 18:18:45 -0400, "Matt"
wrote:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to the
SWITCH or should it go directly to the Battery positive?


Read The Fine Manual that should have come with your amplifier. (and
how would we know what SWITCH you are talking about?)


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
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Old May 13th 09, 04:09 AM posted to rec.boats.electronics
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Default Boat Stereo / Amp

"Matt" wrote in
:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to
the SWITCH or should it go directly to the Battery positive?



How big are its fuses? Twin 30A fuses = 60A tops....pretty much answering
your own question...OUCH! BIG WIRE straight to the battery.

The amps are all switched on by a very low current control wire you put +
12V to when you want to turn the amps on. Shut down the control voltage,
and the amps shut themselves off.

No, you can't charge the battery at all drawing 50A from some huge stereo
off an outboard motor's 15A charging circuit.....



--
-----
Larry
You can tell there's very intelligent life in the Universe
because none of them have ever tried to contact us.....
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Old May 13th 09, 02:00 PM posted to rec.boats.electronics
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Default Boat Stereo / Amp

In article , Larry wrote:
"Matt" wrote in
:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to
the SWITCH or should it go directly to the Battery positive?



How big are its fuses? Twin 30A fuses = 60A tops....pretty much answering
your own question...OUCH! BIG WIRE straight to the battery.

The amps are all switched on by a very low current control wire you put +
12V to when you want to turn the amps on. Shut down the control voltage,
and the amps shut themselves off.

No, you can't charge the battery at all drawing 50A from some huge stereo
off an outboard motor's 15A charging circuit.....


Thats only for peak power. Normal power is much less.
A fuse MUST be installed close to the battery regardless.


greg
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Old May 17th 09, 01:03 AM posted to rec.boats.electronics
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Default Boat Stereo / Amp

The AMP requires a 90A fuse.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.

From what I have been reading that is the way to do it, rather than 12V+
from AMP straight to battery Positive.

Sound good?

"GregS" wrote in message
...
In article , Larry
wrote:
"Matt" wrote in
:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to
the SWITCH or should it go directly to the Battery positive?



How big are its fuses? Twin 30A fuses = 60A tops....pretty much answering
your own question...OUCH! BIG WIRE straight to the battery.

The amps are all switched on by a very low current control wire you put +
12V to when you want to turn the amps on. Shut down the control voltage,
and the amps shut themselves off.

No, you can't charge the battery at all drawing 50A from some huge stereo
off an outboard motor's 15A charging circuit.....


Thats only for peak power. Normal power is much less.
A fuse MUST be installed close to the battery regardless.


greg




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Old May 17th 09, 01:14 AM posted to rec.boats.electronics
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Default Boat Stereo / Amp

The AMP requires a 90A fuse.

Be sure you have enough alternator capacity, along with batteries, to
actually drive that amp. You may find you have neither enough battery
capacity, nor an alternator capable of keeping up with it. Factor in the
cost of a marinized alternator then.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.


What you "plan" on wiring should be based on what the manufacturer of that
amp (which you haven't mentioned) recommends. It still doesn't sound like
you're on the right track.

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Old May 17th 09, 06:17 PM posted to rec.boats.electronics
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Default Boat Stereo / Amp


What is the rating of the switch you intend to connect this #4 wire
to? And what size wire is feeding the switch?

If you are referring to the boat's main battery switch, then, yes, the
output terminal of the battery switch would be a suitable place to
connect the amp power cable.

On Sat, 16 May 2009 20:03:40 -0400, "Matt"
wrote:

The AMP requires a 90A fuse.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.

From what I have been reading that is the way to do it, rather than 12V+
from AMP straight to battery Positive.

Sound good?

"GregS" wrote in message
...
In article , Larry
wrote:
"Matt" wrote in
:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to
the SWITCH or should it go directly to the Battery positive?



How big are its fuses? Twin 30A fuses = 60A tops....pretty much answering
your own question...OUCH! BIG WIRE straight to the battery.

The amps are all switched on by a very low current control wire you put +
12V to when you want to turn the amps on. Shut down the control voltage,
and the amps shut themselves off.

No, you can't charge the battery at all drawing 50A from some huge stereo
off an outboard motor's 15A charging circuit.....


Thats only for peak power. Normal power is much less.
A fuse MUST be installed close to the battery regardless.


greg


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
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Old May 18th 09, 01:47 PM posted to rec.boats.electronics
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Default Boat Stereo / Amp

Yes, I will have to check the alternator capacity..

The manufacturuer recommends 4gague wire for the ground and 12V+ with a
90A/100A fuse inline.


"Bill Kearney" wrote in message
t...
The AMP requires a 90A fuse.


Be sure you have enough alternator capacity, along with batteries, to
actually drive that amp. You may find you have neither enough battery
capacity, nor an alternator capable of keeping up with it. Factor in the
cost of a marinized alternator then.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.


What you "plan" on wiring should be based on what the manufacturer of that
amp (which you haven't mentioned) recommends. It still doesn't sound like
you're on the right track.


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Old May 18th 09, 02:00 PM posted to rec.boats.electronics
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First recorded activity by BoatBanter: Jul 2008
Posts: 21
Default Boat Stereo / Amp ALTERNATOR SPECS

I beleive this is the alternator i have, what do you think:

Sierra G Alternator 817119A4 Single Groove Pulley. 55 Amp.

for a kicker mx700.5 amp...

"Bill Kearney" wrote in message
t...
The AMP requires a 90A fuse.


Be sure you have enough alternator capacity, along with batteries, to
actually drive that amp. You may find you have neither enough battery
capacity, nor an alternator capable of keeping up with it. Factor in the
cost of a marinized alternator then.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.


What you "plan" on wiring should be based on what the manufacturer of that
amp (which you haven't mentioned) recommends. It still doesn't sound like
you're on the right track.


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Old May 18th 09, 02:11 PM posted to rec.boats.electronics
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First recorded activity by BoatBanter: Feb 2008
Posts: 39
Default Boat Stereo / Amp

In article , "Matt" wrote:
The AMP requires a 90A fuse.

I plan on wiring the 12V+ From the AMP (4 gauge) to the COMMON on the
switch. I have a 1' 4 gauge power cable with a 90A fues built in.


Switches are not normally used, but there is a small drain on the battery,
sometimes enough to be bad if the battery sits for weeks.

You also mention switch, then also talk about being switched from control.
if you need more clarity you could read the car audio FAQ, or even ask questions
to rec.audio.car


greg

From what I have been reading that is the way to do it, rather than 12V+
from AMP straight to battery Positive.

Sound good?

"GregS" wrote in message
...
In article , Larry
wrote:
"Matt" wrote in
:

I'm adding an AMP to my stereo system, should the POWER/12V wire go to
the SWITCH or should it go directly to the Battery positive?



How big are its fuses? Twin 30A fuses = 60A tops....pretty much answering
your own question...OUCH! BIG WIRE straight to the battery.

The amps are all switched on by a very low current control wire you put +
12V to when you want to turn the amps on. Shut down the control voltage,
and the amps shut themselves off.

No, you can't charge the battery at all drawing 50A from some huge stereo
off an outboard motor's 15A charging circuit.....


Thats only for peak power. Normal power is much less.
A fuse MUST be installed close to the battery regardless.


greg




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