Thread: kicker ks69
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I. Care
 
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In article ,
says...
what i said was after less power stops sending music.more power will go
further. making it faster..its a trick answer....
i thought you would of known that..


It's not a trick answer; it's an uninformed wrong answer.

Your high power amp sends audio from your speakers at 332m/s, that's a
measurement of speed by the way. My low power amp sends audio from my
speakers at 332m/s. Which sound wave is faster?

Remember, it's "a trick answer".

As Scotty said "Cap'n I cana change the laws of physics." They are
equally as fast, neither is faster. Fast=speed=332m/s for sound. Do
you think 60mph on the highway is faster for your 300hp car than 60mph
for my 150hp car? 60mph=60mph.

Now to practical audio matters.

Assuming no losses in air sound goes on forever, decreasing in intensity
following the inverse square law already explained to you with links to
authority pages. Therefore the limiting factor is the sensitivity of an
individuals ears or measuring instruments to sound volume.

So what does more power into the same speaker under the same conditions
give you, assuming the speaker has a linear power curve and can handle
the power applied?

It starts out with a higher volume (SPL) that travels at the same speed
as any other sound in air (332m/s), and decays following the same
inverse square law; but, it is audible for a greater distance not
because it's faster, but because it's louder and takes a longer distance
to decay to your threshold of hearing.

Now assume you are not sitting in the center of your car, most people
don't, and the rear speakers are further away from you than the front
speakers. I did see a car built special for IASCA World Finals where
the driver sat in the center. Yes, to get the same loudness/volume
(SPL) at your ears from rear speakers identical to your front speakers
you would need more power. This is usually done with your fader
control. You can thus feel like you are surrounded in sound instead of
hearing front staging like you do at a live concert.

However, because the rear speakers are further away, the length of time
it takes the same sound starting at the same instant in time from both
your front and rear speakers to reach your ears is increased for the
rear speakers. If your front speakers are 1m away it would take 0.0030s
(1/332s) that's 3ms to reach your ears. If your rear speakers are 2m
away (2X as far) it would take 0.0060s (2/332s) that's 6ms to reach your
ears. That is why for very critical listening where you might want the
front and rear sounds reaching your ear at exactly the same TIME you
employ time alignment methods. That is you introduce a delay in your
closer speakers to compensate for the differences in distance, a 3ms
delay in this case. This also applies for differences between left and
right speaker distances. So if your right rear speaker was the farthest
away you would have delay times for left front, right front, center
channel,right rear and all of those tweeters if they are different
distances than your mid range speakers. Note that some high-end car
audio systems come with that adjustment ability built-in, mine did.

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