Originally Posted by cowwboy
What is also suprising is what the system is truelly doing compared to what the specs say.
With enclosure loading and Impedance response my 1ohm(confirmed on dc resistance) sub is 6.99-1.69 ohm impedance through the 20-140hz range.
I got bored on a stupid windy day and grabbed some test equipment out of my work truck.
One of these days I'm going to set up a data logger and measure the current draw and voltage of the input to my system and then have measurements of all the outputs of my various amps. Then see how efficient they are and how much I really draw during normal play.
Problem is dynamic resistance, current and voltage require a very high sampling rate to measure properly. ie a DMM won't give you the full truth. A Scope with data logger will give you the full story. Unless of course you are running a test tone source where the frequency is static for longer periods of time.
Its true most the time you don't hit "rated" output because...the music isn't a test tone. But you always want to build your system for Worst case scenario...