Hey guys, I recently bought a Fiero Subwoofer kit off eBay. It was a steal... about $100 bucks for the entire thing. Uncut harness from the power block to the overhead console to the radio and to the amp, amp, amp bracket, subwoofer box, subwoofer, and the overhead console.

QUESTIONS:

1 - The ONLY problem, one of the brackets on the subwoofer box was broken off (I knew this when buying it). When installed, it's the bracket that mounts right above where the passenger's "dead pedal" is (by the courtesy light). The box isn't damaged, but the bracket is missing. Would anyone mind measuring this for me? It looks to me like it's a simple "L" bracket that's bent 90 degrees at one point, with a cut-out where the retaining bolt goes. I would really appreciate it if someone wouldn't mind measuring this for me as I intend to make one myself to replace it. This is the best picture I could find (I've circled the bracket I need):




2 - Does anyone know what the factory frequency range is that's supported? I realize that this is largely dependent upon the radio too... but I also know that the factory amplifier only supports a certain frequency range. I could not find anything anywhere that talks about this (even on Oliver Schultze's page). I'd like to buy an aftermarket speaker, and want to make sure that I put whatever in there I can that will work well. I know that the factory amplifier only pushes the lower frequencies, so a normal midrange speaker likely wouldn't even produce any sound at all.


3 - Anyone know where I can purchase a replacement foam gasket? Back in the day, Rodney Dickman sold everything for this... but he's completely sold out. I bought his kit many years ago, but that's been installed in my Fiero which is in storage and useless to me right now, hah. I'd like to cut my own gasket based on the old one, but just curious if anyone has any good sourcing for material for this.


4 - Last question, unrelated to the subwoofer. My daughter's 85 has the headrest speakers, and not the side-pillar speakers. Can anyone recommend a good set of replacement speakers that work with the head-rests? Specifically... anyone know what the frequency range is that the factory DELCO radios support so that when ordering a replacement set of speakers, I can make sure I get ones that are optimal? What are the frequency range / Ohms / watts for the factory speakers, or more correctly... what can the factory head unit support? I'm thinking (best guess), probably 15 watts per channel? This is the exact radio that she's going to be installing in her car:


Thank you!!!

quote Originally posted by 82-T/A [At Work]: 4 - My daughter's 85 has the headrest speakers, and not the side-pillar speakers. Can anyone recommend a good set of replacement speakers that work with the head-rests? Specifically... anyone know what the frequency range is that the factory DELCO radios support so that when ordering a replacement set of speakers, I can make sure I get ones that are optimal? What are the frequency range / Ohms / watts for the factory speakers, or more correctly... what can the factory head unit support? I'm thinking (best guess), probably 15 watts per channel? This is the exact radio that she's going to be installing in her car:

I originally put a 2-way speaker (with tweeter) in the headrests.
Way TOO shrill for my liking... so I took them out.
They're now in a hard-of-hearing friend's car.

I installed Tang Band 3" 8ohm with high-efficiency neodymium magnets instead.
http://www.parts-express.co...mium-driver--264-812


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[This message has been edited by fierosound (edited 01-30-2024).]

quote Originally posted by fierosound:I originally put a 2-way speaker (with tweeter) in the headrests. Way TOO shrill for my liking... so I took them out. They're now in a hard-of-hearing friend's car. I installed Tang Band 3" 8ohm with high-efficiency neodymium magnets instead. http://www.parts-express.co...mium-driver--264-812

Oh wow, these look great. Is 3" the factory size? Or did you go a little bigger?

Quick question, there are two per headrest, is that why these are 8 ohm? We didn't cover this in my CompSci degree, so is the reason they're 8 ohm because you would have two of them in each seat? Or is there a reason why they aren't each 4 ohm? Frequency looks awesome...


Thanks!

quote Originally posted by 82-T/A [At Work]: Oh wow, these look great. Is 3" the factory size? Or did you go a little bigger? Quick question, there are two per headrest, is that why these are 8 ohm? We didn't cover this in my CompSci degree, so is the reason they're 8 ohm because you would have two of them in each seat? Or is there a reason why they aren't each 4 ohm? Frequency looks awesome...

Factory is 3-1/2" I believe. Some have put in 4-inch.
Factory speakers are 10ohm.

Unfortunately these aren't available.
I think they would be perfect.
https://www.parts-express.c...eaker-8-Ohm-264-1448

[This message has been edited by fierosound (edited 01-30-2024).]

quote Originally posted by fierosound: Draw this out on cereal box cardboard for a template. Bottom right rivet hole locates it. You can measure second hole from first one.

OMG! Thank you SO MUCH!!! I really, really appreciate this!!!

Yes headrest speakers are factory 3.5", 10 ohms. But8 ohms is close enough to work, when I replaced mine I got some pioneer 2 way 4" speakers from Canadian Tire, they claim to have really good frequency range, 35 to 27,000hz, they are 4 ohm, so I ended up wireing them in series instead of the factory parallel wiring, to do that, I ran my own wires from the drivers seat to the passenger seat speakers and back and plugged both sets into the drivers side seat plug, that left me with a plug on the passenger side to plug my small Walmart subwoofer into, without modifying the car wiring at all. Along with Rodney Dickman's dash speakers, and an upgraded 90s Pontiac cassette player with an aux port wired to the cigarette lighter plate, the sound is the best I have heard in any car, and with the sub adjustments and the 7 band eq on the better radio, has a better sound then my (cheap) audio Technica headphones.

Note, I just got an order in from Rodney Dickman... he still has a couple of replacement (for cheap) Subwoofer gaskets. Apparently, the isolation gasket (the 1/2" thick one) is no longer available. I'd ordered two of them, one for my daughter's car, and one for my car, and he had to correct the order because he ran out of them. But he still does have the smaller flat gasket that goes between the speaker grill and the sub box if anyone is looking for them.