car speakers(..hz..)?

Question

if an amp is 20-20,000Hz
and speakers are 25-32,000
what happens with those 20,000-32,000Hz
do they not get played
can any one tell me what to look for in speakers specs.
things like db?
and what i should look for in an amp's specs.
besides watts
thanx all info helps.

Answer 1

correct, the 20,000 and higher don't get played. In truth your ear can't hear them anyway. A healthy young person might be able to hear up to 18khz, but probably only in a laboratory audio test.
The reason speakers are spec'd to 32khz is because it's only 1 octave above 16khz, which is audible. so a sepaker spec'd to 32k shouldn't distort 16khz.
As for what to look for, it is a safe bet to keep the speakers 'rated' power (not max power) equal to the max output of the amplifier. People often run amps into distortion, even without noticing. By keeping the rated power that high the speakers should not blow out.
The better way to judge the quality of a speaker is the sensativity rating. this equates to how much volume you get from the power put into the speaker. a low number means a stiff unresponsive speaker, which usualy means poor sound quality.
if the manufacturer puts the EQ curve on the box this indicates the volume of sound based on the frequecy for the same power input. ideally you want flat accross the spectrum. But more important is the low end roll off. If you aren't running a subwoofer, you don't want speakers with a high freq rolloff, or you'll miss that bass.

Answer 2

Hes right about the speakers and the hz thing. Hes wrong about the power thing, if you have a good amp you should match the speakers rms to the amps rms which would mean the max power for each would match too, why would you want speakers twice as hard to push than what the amps designed to do??? thats like putting 500 pounds on the weight bench when you can only do 250, your gonna bust your balls just trying to get it off the rack, same for your amp