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Old 03-16-2011, 03:29 AM   #1
1986swb
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Join Date: Mar 2008
Location: Sammamish, Washington
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Re: dash speakers?

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Originally Posted by Silence86 View Post
in the dash of an 86 the speakers are 3.5 inches, but i hear 4 inch will fit, true or not?
I kept the stock look and replace my old 3.5" speakers with Infinity Reference 3.5" speakers (3912 cf). They fit using the same OEM speaker brackets but instead of mounting the speakers on top of the brackets, I mounted them below the brackets and use two nuts as spacers along with small stainless steel bolts to attach them. By mounting them under the brackets, there was no clearance issues when I reinstalled my dash pad. Keep in mind that if you have AC ducting on passenger side, you are limited in the depth amount of the speaker. I found that 2 nuts worked perfectly or you can cut your own spacers. Unfortunately, I did not take any photos of the install.

The 3.5" speakers sound great for their size, providing you drive an amp to them. (I went with a 4 channel amp so that I could drive both front and rear speakers.) Otherwise, the 3.5" speakers will sound too bright. Infinity speakers are known for their brightness (highs), so I added a subwoofer and a pair of 6"x9" for the rear installation.

Overall, I'm truly satisfied with the sound quality while still keeping a stock, clean look.

The other option for the front speakers would be to go with kick panels/speakers as they look great but again, you need to drive them with a separate amp, rather than driving them from the headunit. Door speakers I would stay away from since you will need to do some cutting.

And don't forget to use some sound deadening like Dynamat or Hushmat for the metal surfaces. It made a huge difference acoustically with less road noise.
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