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anyone have a idea of what to do to make back speakers sound better? i have a 89 escort gt . and it isnt that sealed in the back its just plastic, would makeing a box that will fit in the side comparments under the speaker to make a enclosuer there be good ?(like for bass, but if its gonna make the shit sound totally gay let me know if u know) or would that just sound stupid? the speakers are stock pioneers 150 watts each.

also,

does anyone know the size of the door speakers in a 89 escort gt and the size of the back speakers? i think they are 6"9 in the back but im not sure
 

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Sealed enclosures and better speakers make all the difference. I've got sealed enclosures in my stock sound system in my 3000GT and they sound fantastic. Deep bass that you can feel in the seat of your pants.

You can try to make a sealed enclosure, or you can take the easy way out and get a sub box. But contrary to popular belief, 6x9's actually CAN sound good. People just never do it because it's eaisier to throw in a an unnecessary sub box and completely unbalance the sound spectrum of their system.

As for the front speakers in your 1st gen gt... nope, don't know. James had the info on his cardomain site, but I think he took it down.
 

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Yikes.

Guys, if there is one thing I know a little about, it's audio equipment. Trying to make a speaker enclosure is not something to do yourself. You will completely alter the intended sound.

Speaker manufacturers spend enormous amounts of money on research for things like speaker enclosures.

I think it's great to do stuff yourselves, but this one you gotta leave alone.
 

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High, if you did know anything about audio you'd know how to make an enclosure. Subs come with instructions so you know the volume and port size etc.
Anyway here's what I did in my 93 GT to fix the back speakers:
They're 5x7, and I got a pair of decent aftermarket speakers, and I did get distortion but then I sprayed tar in the cavity and stuck pink fiberglass to it all over, and I put a capacitor on the speakers so they wouldn't try to do the bass, and I let the sub do the bass. It worked.
 

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I'm not going to argue with you Brad.

You're right - anyone can go ahead and make an enclosure out of whatever material they want in whatever shape they want, ported or not, baffled or not, without any consideration to the science involved (and there is a lot). And there's places that will sell you everything that you think you need to do this.

I just wouldn't do it and I wouldn't recommend that anyone try it. I made a recommendation and you made a different one. That's the great thing about these forums.

Now I'm going to go to my basement and listen to speakers that I know are made properly :D
 

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highanddry-

All the science and stuff that goes into great enclosures pretty much goes out the window in car audio. The listening environment of a car is horrible, period.

When it comes to making enclosures for cars, you don't have to be very scientific to get decent sound. The main thing to worry about is to get the enclosure SEALED and to have one port on it. The size of the port should generally be about the diameter of a toilet paper tube. Just follow those guidelines and you should be alright.

For properly designed audio, the real goal of enclosures is to make sure that you don't get bass cancellation and that you don't get dB spikes at different frequencies and stuff. It can get really complicated, but for cars... don't worry. Just seal it and port it in one spot and you'll be fine.

The stock "enclosures" for the rear speaker drivers in escorts are H O R R I B L E. They aren't anywhere even close to being sealed. And that's why the sound has no depth and sounds extremely tinny and feeble.
 

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Siragan is absolutely correct - the bottom line is that all cars and trucks are acoustical environment nightmares.

Do what you want; you may be able to build something that sounds better to your ears. If it sounds good to you, it doesn't matter what anyone else thinks.

Good luck.
 

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highanddry said:
Yikes.

Guys, if there is one thing I know a little about, it's audio equipment. Trying to make a speaker enclosure is not something to do yourself. You will completely alter the intended sound.

Speaker manufacturers spend enormous amounts of money on research for things like speaker enclosures.

I think it's great to do stuff yourselves, but this one you gotta leave alone.
What enclosures? The speaker manufacturers supply the speakers to the car manufacturers without any box. So what complicated science are you talking about? Subs come with the dimensions you need as per their research, so it is right. If you can read, use a ruler, and turn a screw, you can make the proper enclosure. They even give you all the speaker data you don't need, but could use to calculate the box dimensions in case they forgot.
Of course, the only thing I would need a box for is the sub. The others must use the space that is there.
 

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Last post on this issue from me, I promise. I'm sorry, but I'm stubborn.

The reason speaker companies don't incorporate speaker enclosures in cars/trucks, is because it is a waste of time and money. It could be done, but it's not. The speaker companies know that the only way your speaker has a chance to faithfully reproduce intended sounds is by incorporating an enclosure. And yet, they don't bother. Just like they don't bother trying to get THD specs down to anything reasonable. The cost/benefit is simply not there because the interior of your car simply kills sound waves.

This is the same reason I recommend that people don't even bother. I've resigned myself to tolerating my car stereo until I get home.

But if you do bother and you think it sounds better, I'm happy for you. I'm positive you can make some improvements from the stock set-up. It's your car.

I hope this post doesn't become like the Japan vs US one. I think that must have KO'd Tito - haven't seen him on here since.
 

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Yeah, I never read any of that thread, I thought it was asking for trouble, but I have read a liitle about the aftermath.
What I was talking about is highanddry you must have been talking about home stereo because I couldn't seem to get how "They put a lot of science that we don't know about into their enclosures, so don't mess with it." applies to a car, since there aren't any enclosures in a car. The rear deck speakers in sedans are no doubt designed to use the trunk space. Door speakers probably have that in mind too, but it can't be perfect because they apply the same speaker to several cars. The original question dealt with a cavity that was a plastic interior panel on one side, a steel wheelwell on the other, and a few long crevices that lead the cavity into oblivion. No science or design there. I don't think you could wreck the operation by messing with that. He mentioned making a box that fits in that oddly shaped volume. It's not a good idea in this case, it's a little on the small side. I thought my method was a good idea.
Anyway, Don't get me wrong, you probably know alot about home stereo, But we all get our backs up whenever(and it is often) someone says "If there's one thing I know about it's[insert topic here], and therefor you should[insert trite advice here]." only to see incorrect advice. Your advice flew in the face of the car audio industry's reason for being. Experts on the topic DO THE JOB, not leave it alone for fear of interfering with some science.
 

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If there's one thing I know about, it's that this highanddry guys is one idiot.....
 

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highanddry said:
Yikes.

Guys, if there is one thing I know a little about, it's audio equipment. Trying to make a speaker enclosure is not something to do yourself. You will completely alter the intended sound.

Speaker manufacturers spend enormous amounts of money on research for things like speaker enclosures.

I think it's great to do stuff yourselves, but this one you gotta leave alone.
not necessarily in my opinion, while i'm fairly new to automotive stuff, I've good knowledge of audio, having engineered and built backloaded horn designs.

In my opinion the car itself acts as an infinite baffle enclosure (sealed box), you just have to figure out a way to seal and keep the backwaves from the subdriver reaching to the front, otherwise they will cancel out. (because front and back soundwaves are 180 degrees out of phase)

Now when you build a subwoofer enclosure and you don't seal it properly or just slap in a random length port with no consideration for the dimensions of the box, then that's where I see the acoustic imbalance would come from.

If you were building a subwoofer box that was of a vented design instead of a sealed enclosure (to amplify sound). That would require thought in designing the appropriate dimensions of the enclosure depending on the driver specifications (the driver itself is like a spring than needs a certain volume of air to compress at it's resonance frequency), as well as tuning the port (adjusting length or diameter of the port) to have the backwaves coming out of the port in phase with the front, which results in properly amplified non fucked up sound.

You'd have to do some math and run a bunch of formulas or whatever, but there is software out there that does all of that for you, where you just plug in the driver specifications. It is rather painless and easy to come up with a vented enclosure design, although you'd have to personally see that it works.

I haven't done this in a car yet, so I could also be talking out the back of my butt, but if i'm wrong I hope someone will correct me.
 
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