jrz126
Active Member
As most of us know, the equation P=V*I doesnt apply to audio amps (especially car audio). It seems like most of the ratings for amps are usually inflated quite a bit.
I'd like to try to measure the output of my amp. It's a Hifonics 1000W class D amp. which is supposedly able to put out 1000Wrms at 1 ohm. Now what I'd like to do is to use my oscilloscope to try to measure the power coming out of the amp.
I recently got ahold of some 12 ohm 200W resistors that I was going to use as my load. They have a center tap so they are basically 2 6 ohm resistors. I'm going to use 6 of the 6 ohm resistors to get my 1 ohm load. My subs are only rated for 800W rms, so I dont want to risk blowing them.
So I already tried connecting this resistor set up, but when I go to connect my o-scope leads, the amp starts clicking pretty fast (I think it's going into protect mode?). this kinda puzzled me as to why this would happen. The more confusing part is that I'm able to see the sine wave on my scope with just the probe lead connected (no ground). So I only have one wire connected to the amp, how can it complete the circuit?
ok, this post is long enough, so does this sound like it will work? what kind of effect will the resistors have on my results?
I'd like to try to measure the output of my amp. It's a Hifonics 1000W class D amp. which is supposedly able to put out 1000Wrms at 1 ohm. Now what I'd like to do is to use my oscilloscope to try to measure the power coming out of the amp.
I recently got ahold of some 12 ohm 200W resistors that I was going to use as my load. They have a center tap so they are basically 2 6 ohm resistors. I'm going to use 6 of the 6 ohm resistors to get my 1 ohm load. My subs are only rated for 800W rms, so I dont want to risk blowing them.
So I already tried connecting this resistor set up, but when I go to connect my o-scope leads, the amp starts clicking pretty fast (I think it's going into protect mode?). this kinda puzzled me as to why this would happen. The more confusing part is that I'm able to see the sine wave on my scope with just the probe lead connected (no ground). So I only have one wire connected to the amp, how can it complete the circuit?
ok, this post is long enough, so does this sound like it will work? what kind of effect will the resistors have on my results?