Aux battery for audio

Grit dog said:

^Has to be as big as the + wire.
Or no worky and you fry stuff.
10ga off of any automotive size battery is merely an accessory load.
10ga for a ground is just silly.

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Grit dog said:

bumpin for long periods of time

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Grit dog said:

Just pick what kind of isolator combiner you like.

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• Almost exactly.
• Awfully good.
• Deafening silence.
• Freezer Burn.
• Living dead.
• Loyal opposition.
• Old news.
• Only choice.

1987R30 said:

It's the factory ground. I don't work around wire enough to be able to tell the size by looking at it. It may be #8. Regardless, it is an accessory load. I plan to only run my new audio system (Radio and two amplifiers) off the aux battery.

I got my replacement relay from Rockauto. It is a hefty part. However, I couldnt install it due to coming down with a head cold. Also,, We're dealing with some weather issues here in Florida.

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SquareRoot said:

What are you trying to accomplish by installing a second battery? IF it's just for the purpose of running two amps, why do you think you need two batteries? I'm just probing you on your knowledge of audio equipment. I have put together probably over 200 systems over the years and I know a bit about them. Not everything, but enough. Can you post what amps you are using?

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SquareRoot said:

That's what happens when one jumps to the latest post. A good battery and alternator will suffice for 99% of any system one could put in a Squarebody unless your a nutcake and have blow thru subs in the bed. Now if the second battery was intended for other accessories that might be used in a camper type scenario, I could understand the hassle and expense of a dual battery setup.

I'm pushing 1900 RMS watts like it doesn't know it's there. PowerMaster 150 amp alt, 4 gauge charging wire (welding cable) and 1 gauge feed cable to the amps. It might sound like overkill but it's a once and done with room for increased capacity (wicked me has some idears). To each their own but be aware of those Rabbit Holes.

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Grit dog said:

First post. 1100W (yes not specific peak or rms and @ what impedance….probably another funny word to @Rusty Nail.)

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Grit dog said:

Also first post, he has a truck that came with a dual battery setup it appears.
But correct, hasn’t answered “why” 2 batteries are needed. We need to get past 8ga battery grounds first. However it’s reasonable that 1100W of amplifier can or will draw more power than a 94 amp alternator is putting out on average. Hence a great reason for some additional reserve capacity.

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SquareRoot said:

That's what happens when one jumps to the latest post. A good battery and alternator will suffice for 99% of any system one could put in a Squarebody unless your a nutcake and have blow thru subs in the bed. Now if the second battery was intended for other accessories that might be used in a camper type scenario, I could understand the hassle and expense of a dual battery setup.

I'm pushing 1900 RMS watts like it doesn't know it's there. PowerMaster 150 amp alt, 4 gauge charging wire (welding cable) and 1 gauge feed cable to the amps. It might sound like overkill but it's a once and done with room for increased capacity (wicked me has some idears). To each their own but be aware of those Rabbit Holes.

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SquareRoot said:

That's what happens when one jumps to the latest post. A good battery and alternator will suffice for 99% of any system one could put in a Squarebody unless your a nutcake and have blow thru subs in the bed. Now if the second battery was intended for other accessories that might be used in a camper type scenario, I could understand the hassle and expense of a dual battery setup.

I'm pushing 1900 RMS watts like it doesn't know it's there. PowerMaster 150 amp alt, 4 gauge charging wire (welding cable) and 1 gauge feed cable to the amps. It might sound like overkill but it's a once and done with room for increased capacity (wicked me has some idears). To each their own but be aware of those Rabbit Holes.

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YakkoWarner said:

My impression was that he wants to run dual batteries not because the main battery/alternator is inadequate, but rather for the ability to run the audio for extended time periods without leaving the truck running or risking depleting the main battery to where engine start fails. I can see the appeal to that if you are often in a position where you want the music to be playing but don't want to be running the engine constantly...in that regard to becomes more like a traditional camper load but instead of lights and fans, its music.

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1lejohn said:

Thats a good electrical system you have there, but how does it do if the truck isn't running? How long will your only battery last , and still start the truck? Just saying.

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1lejohn said:

Thats a good electrical system you have there, but how does it do if the truck isn't running? How long will your only battery last , and still start the truck? Just saying.

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