An update and a question for all.
Talked to partsexpress (Eric over there at ext.111). He used a dummy load(read a monster 4 ohm resister) and got 57 volts (frequency unknown). Eric said he had tested the amplifier himself and it made 800+ watts (if memory serves 845watts). He also mentioned a veriac as well as other very similar testing methodologies.
So I really don't know what to say about this one. Bid Chuck says one thing partsexpress says another.
If you read the beginning of this thread onward, we discuss
the issues with loads for amplifier testing, to build a good
load to ensure proper results, hence Chucks amplifier load
is a real monster load not some crummy resistor(s) like these from Partsexpress.http://www.partsexpress.com/webpage....n&WebPage_ID=3
You can still use these if you know what you are doing,
but most novice amplifier testers don't seem to understand
that resistors change their value when heated and when
they record their test results, they still assume the load is
stable, unbeknownst to them it maybe have shifted a few
Lets say you used a crummy resistor that was really
6 ohms during the test and you read 57 volts. When you
do the math, you use 4 ohms in the formula and get about
812 watts. If the load was really 4 ohms, you won't read
57 volts because there is more loading than a 6 ohm load,
therefore lets say you read 45 volts, that's 506 watts.
You can see how the load plays a big role in getting proper
There is nothing wrong with Chuck's test