i need help to figure out how much power my amp will push out at different voltages. The amp i am using is a crescendo bc2000d and it states it will do 2250 at 1 ohm @13.8v. my question is what will be the power output if i were to put it at 14.6v and 16.8v.

Your charging system should have 14.x volts so i would say anywhere from what it does rated to a little bit more.

Your amplifier's output is going to vary at a constant voltage, so it's futile attempting to figure out what it's going to be at another voltage.

 

If someone says: "I clamped that exact same amp as yours, and at 14.6v it was 2650watts," that information is still completely useless to you.

It depends on how tightly or loosely the power supply is regulated.

Is this for competition or daily driving?

I'm gonna start competing

Right now I have 2 pa mofos 124x and its 3k rms and my amp is a bc200d and one ohm is 2250 and I want to know what my amp can put out at 14.6 since that is what my battery can handle up to

grumby13, on 17 Jul 2013 - 06:16, said:

Right now I have 2 pa mofos 124x and its 3k rms and my amp is a bc200d and one ohm is 2250 and I want to know what my amp can put out at 14.6 since that is what my battery can handle up to

You won't hear the difference so don't worry about it.

Also how big of an alternator do you have?

How many batteries?

Edited July 17, 201312 yr by pmureika

I have one battery but will be adding 1 to 2 more do try to lower my vdrop and I'm running 130 so after the amperage taken to run everything I'm left with 90amps but will be upgrading that to either to 200 amps or adding a second 130 to put me at 260 which is 220 to play with

grumby13, on 17 Jul 2013 - 06:16, said:

Right now I have 2 pa mofos 124x and its 3k rms and my amp is a bc200d and one ohm is 2250 and I want to know what my amp can put out at 14.6 since that is what my battery can handle up to

You won't hear the difference so don't worry about it.

Also how big of an alternator do you have?

How many batteries?

He won't hear a difference, but the meter should pick it up.

 

grumby13, on 17 Jul 2013 - 06:16, said:

Right now I have 2 pa mofos 124x and its 3k rms and my amp is a bc200d and one ohm is 2250 and I want to know what my amp can put out at 14.6 since that is what my battery can handle up to

You won't hear the difference so don't worry about it.

Also how big of an alternator do you have?

How many batteries?

He won't hear a difference, but the meter should pick it up.

I made that statement before I knew he was going to more batteries & a H O Alternator.

Just don't know when right now will upgrade from 4ga to 2ga to lower the vdrop

Just don't know when right now will upgrade from 4ga to 2ga to lower the vdrop

I would go with at least one run of 1/0 wire.

 

Especially for competion use.

For the price, i'd go 4/0

I don't know where to get a reducer since my bc2000d can only have 1/0 max or was it 2ga. Quick question is it possible to get close or a little over 3k rms out of the bc2000d it can handle 16.8v max

Edited July 18, 201312 yr by grumby13

So what would be good to upgrade first wire or alt or second battery

I don't know how serious you are about competing, but let me point some things out.

 

Power (watts) = Voltage x Amperage.

 

2000 watts = 14v x 143a

2288 watts = 16v x 143a

 

When amperage is constant, going from 14v to 16v yields an additional 288watts.

Say you have a high output alternator, so you can supply 300 amps. 300amps x 2v (difference between each) = 600watts. 4800watts (16v) vs 4200watts (14v)

 

The maximum potential increase in output for each scenario is 0.58dB

 

After the cost and time involved for setting up a 14v nominal charging system is that increase in output still worth it to you? Welcome to the law of diminishing returns. You would be better off focusing on your enclosure alignment rather than the most inefficient method to increasing output.

 

--

 

Since you don't have enough amperage for that amplifier to begin with and the idea of running less power so you don't have to buy a new alt or batteries is asinine, I would upgrade the alternator, and get adequate wire.

When voltage goes up, so does current so he would theoretically gain more power than that.

But, with an increase of voltage, an increase of batteries is required to.

We had a big discussion about this on another forum and these 18v amps, when driven past 14.x volts will require @18v approximately 22% more current demand than at 14v.

Also, when increasing voltage... efficiency starts to drop as well.

As ironic as it sounds, it does.

That's why if you have 10,000w @18v and 10,000w @12v, the 18v side will require more amperage potential in the batteries than the 12v bank would.

Edited July 18, 201312 yr by shizzzon

Let me rephrase that...

 

When comparing a 10,000w amp @12v and @18v, the 18v wiring will require about 22% more current with a slight drop in efficiency.

 

You still gain about 70% more power ~@10%THD

I guess I will get a battery bank but that will constist of two ofther batteries. So in the case I will stay at 12 volt I will just get a second bc2000d to have enouh power