At 01:01 AM 8/31/00 -0400, you wrote:
>Joe Garza wrote:
><<im an expert on speakers.. i would suggest putting a component set in
>your rear deck..>>
>
>For an expert on speakers, you are exactly wrong. This is exactly what
>he does not want to do b/c it will screw with his imaging. Putting this
>type of sound into the rear deck of a car is not what is needed.
Lets not forget that some people like to be enveloped in sound.
Sure it doesn't sound "ideal" but thats what people like. In
most cars, you are much better off putting seperates up front
from a cost standpoint. Most people like speakers in the back.
The guy is wrong in the sense that he is dropping money on
something that usually isn't necessary (pricey speakers in the
back of the car when the money could be spent better in other
areas).
For what it's worth, sounds like an another expert (probably
gettin commision) shared that piece of information with this
expert.
>Ambient sound is all that is needed from the rear of a vehicle. To put
>it into a more "lay-man" termination: Supportive sound.
>
>To get a true accostical point of view of the sound of an orchestra,
>goto an opera. How many instruments are behind the audience? NONE.
>
>Home theater systems are designed with the mids and highs in front of
>the audience and the sub behind the couch, chair, etc. This is done b/c
>AMBIENT sound is provided by the subwoofer and all other sound is
>provided by the rest. The same is true with a car.
Bad example. Most home theaters have 5.1 channels and some
are now going to 6.1 (5 channels, right front, center front,
left front, right rear, left rear and with the 6 channels
a rear center channel).
You have subwoofers in the trunk because that is where
they fit. Some guys go through great pains to get a sub
up front (from cutting holes in kickpanels to put 12" woofers,
to taking out the heater core and mounting a sub up front
firing into the dash).
>Ideally, the subs, mids, and highs are in the front of the listener,
>with little-to-no sound behind the listener's ears.
Very true.
>Because of the amount of room within the spacing of a vehicle, rear
>speakers are needed to provide an "echo" effect within the car. This
>means that at least a little sound is needed, within the vehicle, to be
>behind the listener to provide a "cloaked" appearance of sound. This is
>done to "fool" the brain into thinking that it is within the confines of
>an auditorium and not a car. You are not supposed to be able to hear the
>music behind you, but only to BELIEVE that the music is in front of you
>as if you were listening to it live on stage.
You don't necessarily need rear drivers to do this. A few competitors
with prodigious amounts of tuning have gotten to the point you can
get that effect with the front speakers reflecting inside the car.
>Car designers only provide sound to their cars. If acoustics were an
>important part of their design, the front of a vehicle would come with
>at least 6 speakers, while the rear would come with 3 (2 ambient
>speakers and 1 sub). This is why designers like Q-Logic make so much
>money. They provide a means by which ppl can correct the acoustical
>deficiencies of a car by replacing the location of the stock speakers.
If we are going to talk about ideal, we would have 2 drivers equidistant
from the driver playing from 20hz to 20khz +/- 0 dB. I'm not sure why
we would want 6 drivers up front and 3 more in the rear unless we have
some sort of delay in the back (or turn it way down). Unfortunately,
speakers in the back are usually designed for the rear passengers, not
the front passengers.
>I would guess that designers of cars do not place them where they should
>be for "leg room" purposes, otherwise the inside of cars would be much
>wider, as "kick-panel" placement is much more acoustically correct.
Kickpanel is far from ideal. Most audio guys at the manufacturers
usually get the leftovers as far as space is concerned (much like
some of us married guys get the left overs are bills, savings, etc.
are taken care of). I mean, when was the last time you went to a
home audio place and asked to have the speakers set up so that
you could have someones leg blocking part of the output of speaker?
If you want to see ideal, head over to the alpine website and check
out Steve Brown's Acura. He reassembled his dash to provide a dash
location for a pair of seperates (cutting into the firewall to do it).
No worries about the passengers legs or driver's legs blocking the
output).
Juan
