Runing an amp from a battery only?

[Krisztián Arnold]

Just now, Rosati21 said:

but on the box is doesn't say 2000 watts rms or max.

based on most hifonics amps I have installed  most done hit the rating on the box or in  the manual.

 

So let's say it does only half of the power. I still can not see that either. 

[slowfkncar]

 impedance curve can change significantly when going from a 130cf cabin to a 2000cf room. 

[SkarredSierra]

You dont have 14v like you would in a car. Most good agms only rest around 12.8 or so. That little battery maintainer isnt doin shit. Your going to ruin your batt by constantly draining it. You could also damage your equipment because of the low voltage. A dmm doesnt read rms and isnt a proper way to set gains. The carts like steve uses to test amps are specifically made for that. And he uses a 14v batt bank with a strong maintainer and only runs for short periods.

[Krisztián Arnold]

10 hours ago, slowfkncar said:

 impedance curve can change significantly when going from a 130cf cabin to a 2000cf room. 

So you think tat can cause a drop in power? 

[Krisztián Arnold]

9 hours ago, mathewyocham said:

You dont have 14v like you would in a car. Most good agms only rest around 12.8 or so. That little battery maintainer isnt doin shit. Your going to ruin your batt by constantly draining it. You could also damage your equipment because of the low voltage. A dmm doesnt read rms and isnt a proper way to set gains. The carts like steve uses to test amps are specifically made for that. And he uses a 14v batt bank with a strong maintainer and only runs for short periods.

Okay, I can understand that.

Do you think if I get like a 14V battery it will help?
Also, if the battery is not capable to run 1000W-2000W amps, than why does XS power sell them like that? 

[SkarredSierra]

Those ratings are based off of being in a car with an altenator to help keep them charged. Even in a vehicle if the alt isnt powerful enough to keep up with current demand the batts will drain and youll have the same issues.

[Krisztián Arnold]

5 minutes ago, mathewyocham said:

Those ratings are based off of being in a car with an altenator to help keep them charged. Even in a vehicle if the alt isnt powerful enough to keep up with current demand the batts will drain and youll have the same issues.

Thanks a lot for helping! ?
That makes sense. ?

[Kyblack76]

What kinda voltage do you get outta the laptop as source (input)  ??  

[Krisztián Arnold]

2 hours ago, Kyblack76 said:

What kinda voltage do you get outta the laptop as source (input)  ??  

I've got a PC to be honest, and I did not measure it just yet. 
Do you think, that the input voltage is too low, or distorted? 

[Kyblack76]

3 hours ago, Krisztián Arnold said:

I've got a PC to be honest, and I did not measure it just yet. 
Do you think, that the input voltage is too low, or distorted? 

Yes  (that the point of my post)