Originally posted by /^Blackmagik^\
ugh god that's one of my pet peeves. it's called impedance. an ohm is a unit of measure of electrical resistance.
impedance: the apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current
ohm: the practical meter-kilogram-second unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
in laymans terms impedance is the resistance generated in an alternating current circuit by either a capacitive or inductive load, capacitive being a capacitor of some sort, inductive being a coil of some sort.
both capacitive and inductive impedance values vary with frequency. this is how we make crossovers, but i won't get into that.
Also in laymans terms, when you see an amp the description reads something like this:
2x150 Watts RMS @ 2 Ohms
520 Watts MAX Bridged
Full MOSFET Oiwer Supply
PWM Circuitry
2 Ohms Stable
Tri-Mode Capable
Full Selectable Crossover (HI/FULL/LO)
Variable HI/LO PASS
Bass Boost
You and I know that the "ohm rating" of this amp is the impedance, but not everyone can/will make that connection. Thanks for the overblown explanation on what I already knew:fawk: