So I was in my basement the other day and saw that I had a spare battery sitting around. So now i'm interested in using that extra battery to power my amp that way I dont have to worry about the Whinning sound comming from my engine area when I step on the Gas.

My question is can anyone point me to the Write up on how to do this. if possible pics of maximas with this set-up as well so I can decide which mounting method will work best for me.

thanks for the Help

 

umm how is a 2nd battery going to stop your noise issue? you need to fix the noise issue. all that will do is add more power. you either have bad rca's/ran in a bad place. bad ground ... well you get the point. i dont have a 2nd battery and Zero whine.

 

Here's a simple schematic you should follow. It's a parallel setup; do not run serial setup because it'll fry up components that have no voltage limiters. This setup will make the second battery serve as a LARGE Capacitor, in return, will eliminate the whining noise you're talking about.

-Peter-

 

You have no whine because your audio doesn't have enough "thump" in it.

Adding a second battery will double up the capacity for current draw; that whining noise comes from large current draws from the amps. Usually, adding a 1 farad capacity per 1000watt amp is the rule of thumb. But if you have 3 or more powerful amps in one system, you might as well throw in a battery in place of 3 capacitors, because buying 3 caps will empty your pocket than one battery will. Large current draw is the primary source of whining noise.

The secondary source of whining comes from the cable setup. Proper Installation of the Speaker Polarities, Isolation of the RCA Cables, and Proper Grounding wires according to the system all constitute to the secondary noise.

Worked in a Audio Shop, that's what's taught to me.


-Peter-

 

Caps are useless...

do the big 3 and re do your amp grounds to get rid of the noise first.

Use that schematic someoen posted but also get a dual battery isolator from stinger.

 

intresting. i was always told noise came from other problems and that diming of lights and lack of bass hit came from low power. on the battery note, isnt there risks involved with putting a battery in your trunk. i know if you change the charge level in a battery quickly it produces a lot of... hydrogen i believe. and if memory serves hydrogen is flameable. or is my thinking wrong. i know you need to vent batteries.

 

My diagram is for a parallel setup, it will not change the charge (voltage) level of the electrical system. That's why I mentioned not to use the serial setup, because serial setup will double the charge (voltage) level. But doing it according to my diagram is going to double up the amperage, while maintaining the same voltage. Let me know if you need a circuits lesson. I'll be glad to explain the math...

Other than that, having the battery in the trunk is just as dangerous as having the battery under the hood. If anything is to happen, battery is the last thing I'd worry about. It's the fuel tank I'm more concerned with in terms of flammability issues.

-Peter-

 

no no, what i mean is by discharging and recharging. your changing the charge level not the voltage level. they put batterys in engin compartment because it can vent the gasses there. if you have ever ran a battery dead and fast charged it, you'll notice the acid is boiling in side, that or jump a car and leave the jumpers on for 4-5 mins to charge the other battry. boiling battry acid is nasty stuff.

 

either way if connections are not good noise will continue

 

These are my picks. Most of the other posts are good information but irrelevant. It takes a LOT of system to need a second battery. Chances are, you don't need one. Check your grounds, sand the paint at the grounds, upgrade your power (big 3) and grounds, get RID of the whine, and THEN see if you need another battery, because I HIGHLY doubt you do.

/thread.

 

++++++++++++1

 

^^^^^ check that make sure you have the RCA's isolated from all other wires. that is tha #1 cause of whining IMO

 

sigh...dj freestyle for the win

try grounding your rcas as well prior to going through the install. Generally its a good practive to get two batterys from the same lot with like voltage as a spiral can occur as they fight for the charge. Check into the wired mbr 70, was made by orion back in the day and was definitely a high quality unit.

used in 3 of my spl setups for quite some time and never a problem. even when we tandemed 3 optimas on it.

 

Well IMO thats the #1 MYTH for whine issues, noise cannot be transfered between DC and AC currents, its a fallacy...usually its a ground issue, or bad RCAs...

 

It's a myth only when you have good RCA's. If you have el-cheapo RCA's, then they can and very much will introduce noise.

 

theres a reason they make them shielded and twisted for more than 5.99 for a 13 foot run stinger and monster cable here

 

Hence I said bad RCAs, should have been more specific, this is why you dont skimp on things like these. Some people do though

 

It's a sad case when I get a guy whos car is whining and all it is is the RCA's.