Rear seat wall speakers

White Lincoln

White Lincoln

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    • Vehicle Details
    1994 Mercury Cougar XR7, 3.8L, all stock
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    Has anyone used 5 1/4" bass speakers hooked to an amp and then to the receiver bass pre-out instead of putting a boom box in the trunk for bass? I was thinking of freeing up the room in the truck and using 5 1/4" bass speakers mounted on a 6x8 convertor plate in the rear side walls.
     
    The location for the rear speakers under the windows is not enclosed, so very little bass can be made in that spot. When I first got my Cougar I put a pair of high end 6x8s powered by an amp. All it ended up doing is causing the trim to rattle in that area.
    I ended up installing a factory sub box with an aftermarket subwoofer, it's fine for me. It provides good mid bass

    Agree with @AnthraxBird about putting speakers in the rear deck behind the seats. That would require cutting and quite a bit of work but could result in good bass with the trunk as the enclosure
     
    • Agree
    Reactions: Irv
    +1 for the factory sub box. While they are rare, if you can find a factory XR7 box, you can replace the factory 6.5" driver or even retrofit an 8" into it. It mounts under the decklid and doesn't sacrifice a ton of trunk space - way less than most sub boxes - and can fill the spectrum enough to give the door speakers a break. :)

    https://forum.birdcats.com/threads/factory-jbl-sub-rebuild.177/ documents my journey.
     
    I did the same thing Kenz did in my early years of ownership. You're not going to get anything resembling acceptable bass output from the factory rear speaker locations, and stepping down from 6x8" to 5 1/4" is only going to make it worse.
     
    I did car audio for years.
    Get some good jbl 6x8 speakers for the factory spots, and a 12" sub for the trunk, and a good 5 channel amp.
    You can't get bass out of 6x9's; I've destroyed many sets trying. I started car audio in '79. :)
    Find some decent co-axial speakers with bass to ~200 hz, Add a jbl 12", and a beefy amp. It will sound much better.
    I didn't want to fill the trunk with a heavy box, so I found a jbl 1214d speaker that only needs a 1.5 cu ft box. It's in a piece of 12" dia sonotube concrete form, less than 2 feet long.
     
    Baffles for the rear speakers could probably improve the bass response. I was going to try some but last I checked they wouldn't fit because of the limited depth of that location.

    1756910580674.png
     
    Those speakers are all too small to produce bass. You end up smoking the voicecoil.
     
    Neat Fact: Our buddy Nick from MHS invented the copp,er former design, that helps this problem. RIP, Nick!
     
    Kenz said:
    The location for the rear speakers under the windows is not enclosed, so very little bass can be made in that spot. When I first got my Cougar I put a pair of high end 6x8s powered by an amp. All it ended up doing is causing the trim to rattle in that area.
    I ended up installing a factory sub box with an aftermarket subwoofer, it's fine for me. It provides good mid bass

    Agree with @AnthraxBird about putting speakers in the rear deck behind the seats. That would require cutting and quite a bit of work but could result in good bass with the trunk as the enclosure
    Click to expand...
    I wish I could find an OEM box. The prices I saw where rather ridiculous due to the damage I saw in the pictures. That is preforable to me, but as mentioned, cannot find one. The ones I did find... "out of stock".

    My Town Car has the OEM 6" sub under the deck and it is awesome. I could try to recreate that by fabricating a wood box... naaaa....
     
    Grog6 said:
    I did car audio for years.
    Get some good jbl 6x8 speakers for the factory spots, and a 12" sub for the trunk, and a good 5 channel amp.
    You can't get bass out of 6x9's; I've destroyed many sets trying. I started car audio in '79. :)
    Find some decent co-axial speakers with bass to ~200 hz, Add a jbl 12", and a beefy amp. It will sound much better.
    I didn't want to fill the trunk with a heavy box, so I found a jbl 1214d speaker that only needs a 1.5 cu ft box. It's in a piece of 12" dia sonotube concrete form, less than 2 feet long.
    Click to expand...
    So I found out some fun facts I never realized with my current system: (and why it sounds like shit)
    The JVC head unit is only front / rear-sub pre-outs. My Town Car JVC has front / Rear / sub.
    The head unit is NOT surround sound, the Town Car is.
    The speakers are for the most part, okay - JVC 3-ways in the door / panel and 2-way in the deck.
    The speaker sub is on JVC 4x50 AB... heck, the head unit puts that much power out on its own.
    The woofer sub is a JVC 750x2

    Geez.. what am I missing here? (other than its an old system.)

    So I have been looking over some new equipment,
    JVC 3 pre-outs, 5.2 surround (JVC KD-T925BTS)
    JVC 1800 x 4 amp (BLAUPUNKT BPA-E604 4-Channel Class AB)
    I will keep the current JVC speakers until I blow them up. I am not that wealthy..... and I can't hear anymore anyway.
     
    I did a set of free air subs in the rear deck of my Turbo coupe. System sounded great and was well balanced enough that the lead guitarist of Anthrax would listen to their tracks they were working on in it. I'm finishing up the revamp of the system in the Cougar right now and also gearing up to do the one in the Focus. Cougie got a set of Rockford Fosgate Power T1682's for the rear sides and an impressive little Sound Ordinance M100-2 amp to drive them. I was getting everything removed in the non-back set area so the tint guy could replace the old peeling tint. Not an easy job with the cage but they managed to get it done properly and it looks great. I also removed the custom door panels to make things easier for them and went to town on adding the layers of sound deadening I failed to do before on the doors. I also sound deadened the crap out of the rear side inner and outer panels and stuffed moving blankets in the open spaces.


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    Finishing up a deep pour on the amp cover thing.

    -Scott
     
    White Lincoln said:
    I already have 4x6 2-ways in the deck.
    Click to expand...

    Did you install them? If you can post a picture I would be interested in seeing that. Do you think 6x9s would fit there? Even though they aren't that much different in size, 6x9s seem to make way more bass and have a better selection.
     
    Guys, if you want a sub box, the hardest part is getting the specs on a sub. Then you plug those numbers into a program, like this: https://subbox.pro/en/ (random web program).
    That tells you how big to make the box.
    Measuring a given speaker is possible, but a lot of work. Crutchfeld sells jbl subs.
     
    Big Scott said:
    Cougie got a set of Rockford Fosgate Power T1682's for the rear sides and a......

    -Scott
    Click to expand...
    When I was researching speakers, the Rockford Fosgate Power T1682's came up the most in the "best car audio speakers". I ran through about 10 sites for best speaker and the RF speakers seemed to be the most suggested (that I would buy). Good choice. But I would not want to go as far as you did with a car stereo...
     
    Kenz said:
    Did you install them? If you can post a picture I would be interested in seeing that. Do you think 6x9s would fit there? Even though they aren't that much different in size, 6x9s seem to make way more bass and have a better selection.
    Click to expand...

    I do not believe I ended up using the pegboard mounting plate. I used the 4x6 because it fit best of the speakers I was looking at. One down fall to the 4x6's I used, they don't put out a log of sound, as you mentioned AND they are 2-way coaxial.

    deck holes used.JPGmounting platform.JPGhole in deck lining.JPG
    installed desk speaker.JPGright side.JPGleft underneath.JPG
    left side underneath.JPGinstalled from outside.JPG
     
    1756940502065.jpeg

    I installed a set of passive radiators in the rear deck of Linky to help the subs pass gas... and a cone. The tweeter horns were never hooked up.

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    Audio Frogs for the win.
     
    Somebody is serious about their car stereo enjoyment... :P

    Thanks Scott, I now have a complex about the "size" of my stereo system....
     
    I have some of that blue/black kevlar/cf material, also some red/bk I was going to do a hood with, but a me convinced me it wouldn't stick to steel in the sun.
    You can buy thick kevlar honeycomb as radiator shields for flattrack cars.
     
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