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Kick-Ass Car Audio System Setup!

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#21 ·
W7s are overkill but if you can afford it go for it. If you do not want to spend that much money, check out JL W6V2 series. They are pretty much a watered down W7, same tchnology, similair looks, just not as poweful as the W7s are.

Originally I bought 2 JL 12W6v2s but sold one of them as 2 was way too loud. I currently run one JL 12W6v2 powered by a JL 500/1 amp. It is way more bass than I care to have.
 
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#22 ·
Ya know it is funny with the EVO,, Every one thought that there would be a bad blind spot until they sit in the car, The 4 inch on the pillar fits perfectly between the front edge of the apillar and the back edge of the mirror mount on the door, There was no obstruction!!!! I just turned out that way as a nice little bonus!!!
 
#23 ·
I've never met an installer who has studied acoustics. Most of them can use a rotor, jig saw, table saw and a calculator but thats about it. The ones that can use fiberglass and have an RTA thing their the Sh*t. I laugh at installers who think there all cool because they have a RTA. Want to hear something funny, you can disconnect your tweeters and reconnect them with the wires switched and a RTA would NOT even know the difference. LOL. RTA's can't measure time, can't measure phase and if you want to do any "REAL" measurements you'll need much better resolution than 1/3 octive. You can get "palm pilot" sized measurement devices with 1/12 octive resolution.

Ever seen an installer use any kind of programs in model how sound waves move though a particular car and take in to account speaker parameters for optimal performance? Guess what? Manufacturers recommended enclosure sizes are meaningless! Why? because all cars have differents shapes and sizes.
 
#25 ·
racingxtc7 said:
Want to hear something funny, you can disconnect your tweeters and reconnect them with the wires switched and a RTA would NOT even know the difference. LOL. RTA's can't measure time, can't measure phase and if you want to do any "REAL" measurements you'll need much better resolution than 1/3 octive. You can get "palm pilot" sized measurement devices with 1/12 octive resolution.
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If you only reversed the connection on the tweeters, you would see unexpected dips at the crossover frequencies where the signals are 180 degrees out of phase.

You are mostly correct in that most RTAs don't measure time or phase. However, if you haven't correctly wired your system and observed proper polarity and placement for time-alignment, you probably shouldn't be trying to use an RTA to fix it in the first place. It's a tool, not a crutch.

If you really want to get into it, you will need to do TIF analysis with somewhat expensive equipment and use expensive parametric EQs to deal with notches.

My favorite thing is the people who damage their hearing with the SPL levels capable or being reproduced by these systems, then try to make subjective judgements about the sound! ;)

In the end, a car is not a very sound-system friendly environment.


Ever seen an installer use any kind of programs in model how sound waves move though a particular car and take in to account speaker parameters for optimal performance? Guess what? Manufacturers recommended enclosure sizes are meaningless! Why? because all cars have differents shapes and sizes.
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Many "recommended" speaker enclosure sizes are meaningless, because they are not correctly calculated to begin with. The problem compounds in a car because the coupling to such a small volume of air tends to make the car (and occupants) part of the enclosure because you are dealing with all near-field phenomina atypical to room acoustics. There will be numerous standing waves due to the physical size of the environment. The one thing you have going for you is that there are not many truly parallel surfaces to deal with.
 
#27 · (Edited)
vtr1000 said:
Ya know it is funny with the EVO,, Every one thought that there would be a bad blind spot until they sit in the car, The 4 inch on the pillar fits perfectly between the front edge of the apillar and the back edge of the mirror mount on the door, There was no obstruction!!!! I just turned out that way as a nice little bonus!!!
Click to expand...
Come to think of it, I sat in a Lancer in the Eclipse booth at the Tokyo Auto Salon last year that had a similar setup with the pillars and I rememeber liking that setup a lot, the center channel was cool. I grabbed a couple pics of my webpage:
 
#31 · (Edited)
racingxtc7 said:
BusaDave

Its always nice to run into someone else who has a clue. My tool of choice is TEF by Goldline. Greg Miller of Goldline is a great guy and a motorcycles enthusiast.

http://www.gold-line.com/home.htm
http://www.gold-line.com/tef/t-tefpre.htm
Click to expand...

That is some cool stuff that would aid in giving final adjustment to my installed audio systems, I have done some tuning with a good set of open air Grado Head phones.

Any idea how much any of that test equipment costs!?
 
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