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help installing speaker

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Old Aug 23, 2006 | 08:08 AM
  #1  
longhorn450's Avatar
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From: north texas
Car: 1990 Trans Am
Engine: LB9 305...350 or 383 coming soon
Transmission: 700r4
Axle/Gears: 4th gen 3.42
help installing speaker

Ok, I bought the Infinity 6402CFP Plate speakers for my 90 Trans Am. I just wanted a little better sound that was easy to do, nothing big. I could install the passenger side easily but the bigger drivers side magnet is hitting almost everything on the way down . It hits the dash, the top of the gauges, and maybe an A/C duct?? Is anybody running these speakers up front? Is there anything I can do besides get different speakers?
Thanks!
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Old Aug 23, 2006 | 01:45 PM
  #2  
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
https://www.thirdgen.org/stereo2
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Old Aug 23, 2006 | 05:04 PM
  #3  
longhorn450's Avatar
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From: north texas
Car: 1990 Trans Am
Engine: LB9 305...350 or 383 coming soon
Transmission: 700r4
Axle/Gears: 4th gen 3.42
Thanks a lot!! ..didnt even know that existed......So how far exactly can the heater plastic be moved, because I need to move it about .5-.75 inches towards the engine. I also will need to cut out a lot of the plastic pieces in there, can I pretty much cut away anything that is not the back of the gauges or the heating stuff?
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Old Aug 24, 2006 | 07:59 AM
  #4  
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
You should be able to move that heater box plastic as far as you need to as long as you're careful, and you don't always heat & stretch the exact same spot. Spread it out over a bigger area.

You should be able to easily identify what you can and can't cut too. I wouldn't cut the heater lines, and I wouldn't cut the back of the gauges. Any of the support parts can be cut/trimmed without much worry.

If you find that you can't get the heater line pushed back far enough, you always have the option of cutting it and installing a plate over the spot you cut, but I think that would be next to impossible to do unless you pulled the dash out of the car.
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Old Aug 24, 2006 | 09:32 AM
  #5  
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From: MA
Car: 1995 Formula; 1976 Trans Am
Engine: LT1; None
Transmission: T56; None
Have you considered just purchasing another set of speakers for this location, or investing in some quality kickpanel setups? There are easier ways of getting good sound without spending a lot of time doing surgery on heating ducts and the innards of your dash, hoping you don't screw anything up.
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Old Aug 24, 2006 | 09:54 AM
  #6  
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
I agree that kick panels are a better solution, but for those that don't want to spend that kind of money, putting a good set of 4x6s into the dash is still a worthwhile upgrade, and unfortunately, there are really only a couple sets that have a decent sound, and they all require modification for a firebird dash because of the large and offset magnets.

Doing the work on the driver side isn't really that hard, and shouldn't take you much more than an hour to complete. The only thing you really need to be careful for is melting all the way through the plastic duct, but if you take your time and don't apply too much heat and/or pressure to one spot, you'll be fine. I've done 3 firebirds this way and had good results each time.
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Old Aug 24, 2006 | 03:40 PM
  #7  
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From: north texas
Car: 1990 Trans Am
Engine: LB9 305...350 or 383 coming soon
Transmission: 700r4
Axle/Gears: 4th gen 3.42
Thanks for all of the advice. I probably wont get to doing that soon but Ill post on how it goes. And also, if I move the heater stuff too much, will it hinder air flow to anything? Thanks Again!!
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Old Aug 26, 2006 | 11:00 AM
  #8  
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From: Washington DC metro
Car: 89 RS
Engine: 2.8
Transmission: 700r4 auto
Axle/Gears: huh?? guessing stock.
yea, jim, you make it sound so friggin easy... but you actually know what you are doing!

I melted a hole in my sister-In-Laws ducting during the install. but a little creative use of Fiberglass and it is good as new. but now she wants kick panels made... I really hate this girl.
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