Hi, I'm a newbie to Car Audio and have been ripping my hair out as to why i cannot get my car sound working correctly. I have a TJ Magna sedan.

I currently have :

Eclipse CD5441 Head Unit
Audiobahn 6004 Amp (for fronts and rears)
Polk Momo 15" Subwoofer
Audiobahn 8002T Monoblock
Jaycar 6.5" Kevlar 2 Ways at the back (pulled out the Eclipse) 6x9
Cadence US-6K spilts
(Currently i am using JL tweeters in the sail area but will now install the Cadence tweeters in the door trims)
I have sprayed the trims with sound deadener.

The problem is mostly from the front. I seem to getting a lot of midrange that sounds like it is coming from a horn speaker. Very ear piercing midrange. Kinda what it sounds like when you open your boot with your stereo on from the back of your rear speakers if you know what i mean.

I have tried Jaycar Kevlar spilts (these had a huge hole in mid bass), JL TR splits, Cadence UK-6K and Eclipse speakers and they all exhibited the same thing.

Could it be that the resonances from the rear of the front component speakers is somehow bouncing back through the speakers? If so, how do i fix?

I have spend countless hours and money playing with different speaker setups but it is getting to frustrating now to get some clean sound from my car therfore i kindly ask for some guidance and expertise...

Greg

have u only sprayed the door trims with sound deadening have you? the most effective way of getting better mid bass is by sealing the door. so covering up the service holes with mdf or cardboard or watever u can think of to do the job.

Replace the factory baffle with mdf, the plastic is very rattly
Acoustic tiles behind your drivers (from jaycar if ur on the cheap) to stop reflections
Deaden ur doors with stinger roadkill / dynamat to stop resonance
Seal the service holes with mdf to avoid a leaky midbass cavity
Deaden the inside of ur trim with Sound off - especially around the airvents, and inbetween the vinyl and material trim
tape up lockrods with electrical tape

Here's some of my door prep - 98 TF Magna Advance


My Baffles are angled but flat mdf will do the trick nicely.

Peace

Tim

Time to get eq'ing...that and from memory, audiobahn dont make the best amps around :/ i'll wait for someone to confirm.

Have you tried any setup with the tweeters in the kickpanels? I found the sound to be way too "harsh" when my tweeters were anywhere else also.

audiobahn amp's are not that bad, they do make some "dub" ones that leave a little to be desired, but there other gear is not to shabby, better than most generic brands.
would be a good upgrade for you quid.

Yeah, i'm breaking out of the budget setup now. Time for new splits.
It was a fantastic place to start off, though.

I have played around with the high pass filters but seem to get no where. As s-tim-ulate has shown i have not sealed the door cavity's but i have sprayed sound deadener all over the inside of both front trims. I will have to buy some acoustic tiles for behind the speakers (will this stop the resonent midrange?) and move the tweeters near the kick panels.

Would the sound deadener from Jaycar be ok to seal the door off CAT. NO. AX3684 and the acoustic tiles CAT. NO. AX3652 do the job?

no you need to sound deaden the outer door skin then seal the door with duct tape and MDF over the service holes then deaen that whole surface. and the acoustic tiles should stop the resonance from the speakers bouncing back.

Rhyso

OK - I went to Tonkins and purchased a Roadkill door pack (both doors) and a pair of high quality acoustic tiles. I have been told by many to put the tile directly behind the speaker and to tear off the factory plastic from the doors and install the Roadkill across the entire area including the surface holes of the inner skin of the door, not the outer.

Read this.

The tutorial is at.
http://www.caraudioaustralia.com/content.php?contentID=19

Some great discussion specifically about the tute, with some more tips
http://www.caraudioaustralia.com/forums/in...showtopic=50295

The basics are there. You can do funky stuff like use aluminium sheet instead of mdf, and that black setting rubbery stuff (urethane) instead of mdf.

Remember to put the plastic back on though.

Otherwise wooden door trims will start to warp with the water....

Thanks guys... It's not a bad suggestion to use aluminium for the new baffles. I bought some MDF but considering some views of it i may be concerned. Where would one buy the rubber material to use as a baffle?

hell, i've seen cardboard used to seal the doors. not flimsy stuff tho, some good stiff cardboard they use to pack important fragiles in. nice and stiff afta some SD been run over it. probably be able to get some off an electronics store or something. nothin wrong with mdf, it should'nt have water problems because u r gonna SD over the top of it to make it nice and sealed. arent u?

NB: the only acceptable answer to this is "Yes Scorpion. Yes I am." Like he said, dont be worried about the MDF. Give it a coat of paint to waterproof it a bit. Then duct tape over the top. Then SD over the top of that. (All of this is covered in the tute, I should know, I followed that thing just last week).

Great guys... Wish me well tommorow... I'm gonna need it!

Check out www.aussiemagna.com before hand.
Heres a few links to do with deadening
http://www.aussiemagna.com/forums/showpost...15&postcount=13

mdfs quite porous. I'd suffest a vew layers of a sealing varnish. Cant go wrong with varnish, whereas some paints arent designed to be weatherproof.

edit : also, with varnish, you can see through it to see if damages is hapenning. Not always easy with paint.

Guys, the job is done and it's a huge improvement. I should of done it earlier! Thanks again!