Sign in with
Sign up | Sign in
Your question

What size power supply do i need to run a 2000w car amp

Last response: in Components
Share
January 9, 2012 5:00:58 PM

im wanting to run a car audio system in my room..
a c 273 ) Power supply
January 9, 2012 5:11:01 PM

Use a car battery.
a b ) Power supply
January 9, 2012 5:37:14 PM

And a charger.
Related resources
a b ) Power supply
January 9, 2012 5:50:47 PM

Hi :) 

And some ear defenders for anyone else in earshot lol :) 

All the best Brett :) 
a b ) Power supply
January 9, 2012 6:31:59 PM

2000W AMP IN YOUR ROOM? Say hello to deafness in 5 years :p 
a c 1098 ) Power supply
January 9, 2012 8:12:20 PM

I don't think you're going to be able to find a computer power supply with a single +12V rail that will be able to supply enough current. A 2KW computer power supply would have multiple +12V rails.
January 9, 2012 8:16:44 PM

Agree with ka888, no chance of finding a 'pc' power supply to run a 2K amp and why the heck would you wanna?
January 9, 2012 9:04:04 PM

chaz111 said:
im wanting to run a car audio system in my room..

Just buy a decent Hifi - dont forget that a 2000 watt amp is probably rated for about a quarter of that ie 500w. It probably will put out 2000 watts for a few seconds before it blows/ overheats / drains all the street lights :pt1cable:  :pt1cable:  by the time you have four / 5 speakers running off it it is putting out about 80-100 watts per channel which is what a good surround sound reciever will give.
January 9, 2012 9:50:45 PM

lol @ this.

Kid- you can buy a DJ amp that is rated at 100watts that will output way more power than your 2000 watt car amp.

Look at something like a crown 402 if you want clean power cheap.
a b ) Power supply
January 9, 2012 10:09:46 PM

you just want a 2k transformer. not a computer psu... or a battery charger and a battery. connect the charger to the battery and then the amp. if you dont use a battery your likely to blow the amp as the battery works as a kind of regulator.
a c 1098 ) Power supply
January 9, 2012 10:18:31 PM

A 2KW transformer is useless without the rectifier and filter stages. Pure AC isn't going to get you anywhere and a 2KW transformer would be huge and heavy.

The battery would act like a capacitor not a regulator.
a b ) Power supply
January 9, 2012 10:27:14 PM

well i know it would work as i ran a car sterio of a build like that in the workshop... your rite its not ideal but it did work... rite up till i shorted it with a cup of coffee ;) 
January 9, 2012 11:03:24 PM

Before you buy anything check your home fuses/breakers, figure 1amp = 125 watts, a typical fuse/breaker for any room except utility/kitchen, should be 15Amps, which would give you 1875Watts, normally you don't want to exceed 80% of the fuses capability. For this case, 1500 watts would be your max on a 15A fuse/breaker.

Amps x Volts = Watts

In Summary:
15A: 1500Watts
20A: 2000Watts
25A: 2500Watts
30A: 3000Watts

Remember this is EVERYTHING on that fuse/breaker, which is normally two rooms per fuse/breaker, so if you max out on one electrical socket (which I don't recommend anything over 1300watts on an individual plug), nothing else can be using electricity or you'll blow the fuse.

Too many Amps on a fuse/breaker can cause significant damage to your homes electrical system, depending on how old your home is, wire guage etc...

Hope this information helps.
January 9, 2012 11:25:34 PM

Also, keep in mind that a lot of car stereo shops will oversell wattage on cars... based on A x V = W, as stated above, a 2000watt Amp would require a 165A Alternator in a car. Alternators of this size are typically found on large diesel trucks, whereas 120A's on Pickups, and typically 60-80A on cars (stock). Cars/Trucks usually are 12Volts, to mimimalize the compexity of vehichle electrical systems.

You would probably be fine pushing a 1000watt PSU into the Amp, however check the 12V rails for maximum wattage, even if you got 700Watts, that would be about the maximum you could get from a car alternator if you never upgraded it. (Meaning little to no change from what was in your car, assuming no upgrades).

Also on fuses/breakers, typical homes with 15Amps have 14 guage wiring, and 20Amps 12 guage, do not exceed the maximum specification of Amps on the wire or you'll probably start a fire. Scratch that: You will start a fire if you exceed the amps/volts on a what a wire is specified at.
!