PG xenon 200.4

my amps are rated ( on the box )

class D = 500 rms @ 4ohms and 900 rms @ 2 ohm- 1600 watt max

class ab = 60 rms x 4 @ 4 ohm and 75 rms x 4 @ 2ohm - no max listed.

 

well my calculations are if your amps are the most efficient of their topology

 

just use a multi meter,and you'll know exactly what your output is.unless you dont have one.

 

where you put the 2 multi meter prongs and what would you set it to read?

 

Power is given by Volts x Current ( P = E*I )

While volts would be easy enough to read with a digital volt meter, current would be nearly impossible. I use a Fluke 189 and its max current capability is 10 amps.

To measure current the leads need to be inline, and max current will only happen for very brief periods. The meter won't refresh fast enough to get an accurate reading. You would actually need a meter that records the current changes and can graph them so you can see the max output.

I dont think a multi-meter will work.

 

a multimeter is not 100% accurate but it is better than nothing...it will get you in the ballpark

If you want to measure true output you'll need a clamp meter and a DMM

 

Your method for estimating will get you closer than the DMM. Don't believe me, try it.

Also don't use an expensive meter. My Fluke will protect itself, a good Simpson will to. Others will be harmed.

Try it let me know how it goes.

I've been there done that.

 

are you talking about using a multimeter and ohms law to figure out amplifier output???

we are learning about how to figure out amps, resistance, current, and power in series and parallel circuits in physics...my favorite chapter by far lol

 

Ohms law is E = I * R, but we need to figure out power. Power is given by P = E * I

Both quantities are measured differently, the potential (voltage ) is measured in parellel. Current however is the actual flow of electrons from the negative to the positive. (NO I'm not backwards). In order to measure the flow we need to be inline. Now lets look at the problem E = I * R. In an AC circuit R changes depending on frequency.

For one reason or another www.caraudiotalk.com does not have an equation editor available to me. (Viking can you fix this oversite)

In an AC circuit R is called X sub L. it is determined by the equation 2*pi*frequency*coil inductance (in milliHenrys). As we can clearly see inductive reactance is directly proportional to frequency. Making measuring nearly impossible with a DMM. Even if it could handle the current.

 

i'm lost.so how can i go about figuring my amps power output?also my amp has an internal fuse so i cant do azn's methode either.

just want to know if i was close to what i thought it to be.

 

Will look into it.....

 

my method is a ballpark estimate of an amps output capability...mainly to prove cheapo flea market amps rated at 3000 watts max that they can only put out 100 watts rms