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Thread: Box trunk soundproof? Subwoofer question

  1. #1
    Member Karotte's Avatar
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    Default Box trunk soundproof? Subwoofer question

    I started to upgrade the sound system on my 88 Town Car, replaced speakers, player and added an additional amp so far so good.... I put an small 8" rockford sub in the trunk which was from my Jeep where it was a decent bass upgrade. But I wasn't happy with the result so I bought an 12" sub but there was only a little improvement way too less bass for my taste.

    I am considering whether it could be due to the insulation or too much sheetmetal?

    How do you guys get more bass inside your box?
    1988 Lincoln Town Car
    1975 Lincoln Continental Mark IV

  2. #2
    I'm an air-conditioned gypsy gadget73's Avatar
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    probably the thick seat padding. Kinda have the same thing with mine. If you can put the sub facing the rear seat it should help.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

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    "The finder of unobtainium and other magical items" zoomie's Avatar
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ID:	54173Well i have always ran a single 15, here is my sub and temp amp rack setup as well as battery and wireing, my first setup was a 15 atomic manhattan in an atrend sealed enclosure, the current setup has a 15 alphard machete sport v2 in a 2-1 fourth order bandpass. I took the factory 6x9s out to help with sound transmission. You can put a set of 6.5s in the rear sail panels to compensate for the rear speakers.
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    Last edited by zoomie; 05-17-2020 at 09:23 PM. Reason: Added picture
    89 townie, mild exhuast up grades, soon to have loud ass stereo....

  4. #4
    Beater gonna beat sly's Avatar
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    I ran 2 10s in the trunk of mine to overpower the rear seat insulation. In my 93 I cut out the "subwoofer hole" part of the cardboard of the rear deck carpet and back-filled it with a metal speaker grill for support. This helped reduce to 1 10 instead of 2 and free up a lot of trunk space as I was able to hang it from the rear deck below the decklid torsion spring bars. Obviously there's several ways to go about it.

    EDIT: added pics. Most are from the 93, but the side shelf one was from the 88. I went to the large box in the 88 first and then moved it to the 93. I now have the slim Pioneer single 10 in there. Still have the twin 10 box, but it's not in anything right now.
    Attached Thumbnails Attached Thumbnails 20190619_180548.jpg   20190619_180501.jpg   1.jpg   small box and amp_.jpg   big box_.jpg  

    Box_Right.jpg  
    Last edited by sly; 05-17-2020 at 10:09 PM.

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  5. #5
    Member of the Orb Alliance packman's Avatar
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    70's and 80's full and mid-sized cars seem to have more metal and insulation in them. When I was running my 2 x 12" Ultimate Attitudes in my Malibu, I would have to really crank it up to get what I wanted (young at the time). My buddy's '84 Escort had 2 x 10" Pyramid Super Blues which were roughly half the wattage of my system, but much louder both interior and exterior. Could hear that car coming literally from a mile away.

    I can't imagine what I would have to run in the '86 CV to make my 19 year old self happy :-/

  6. #6
    Ford Fullsize For Life! marquis_82_withneons's Avatar
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    i ran 2 15s in my 82 for the longest time, ive since removed everything so i can redo the whole install. for my insulating purposes im using a peel and stick sound deadener. its basically a dumbed down version of dynamat. it comes on a roll, 6" wide, 25ft. got it at home depot for like $14. works absolutely fantastic. i lined the roof, floors, trunk, and doors with it.
    Charlette - Brown 1977 Ford LTD - 351 Windsor 155K, Full Custom Pioneer system, green HID, interior & underbody
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  7. #7
    I'm an air-conditioned gypsy gadget73's Avatar
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    I put a layer of that in the trunk but with the idea of helping with my exhaust drone issue. It dulled the peak, but now it drones over a wider speed range. Its inside the doors too. Cuts down on the outside noise a fair bit, but replacing the bad window seals probably did more.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  8. #8
    No mean-spiritedness here. IPreferDIY's Avatar
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    Are you against putting a subwoofer in the cabin (which I'm guessing was the way the 8" worked in the Jeep)?

    I haven't hooked up my system in quite awhile, but I have two 8" sub tubes on the rear floors and a dual 10" sub box on the back seat. With those extending the bottom ends of four pairs of regular speakers, I get a nice nightclub sound. I have no need for sound insulation with my setup. It's not like I listen to flute music on the highway.

    2000 Grand Marquis LS HPP, a hand-me-down in 2008 with 128,000 km; 175,000 km as of July 2014
    mods: air filter box "tuba" (in place of the "trumpet"), headlight relay harness, J-mod (around 186,350 km), 70mm throttle body, NKL4 PCM (from a 2000 CVPI, nothing great there apart from highway cruising), KYB Gas-A-Just shocks (after >202,000 km on originals)

  9. #9
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    Not a Panther, but I installed my first complete audio system earlier this year in my Explorer. I did not use dynamat.

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    It thumps hard, am happy I did my research. There is a lot of conflicting info out there on car audio.
    ..

  10. #10
    I'm an air-conditioned gypsy gadget73's Avatar
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    problem with subs in the cabin is you can't put people or other stuff in there. I've honestly given some consideration to cutting the rear deck and installing a 90s factory subwoofer enclosure.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  11. #11
    I post a lot...
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    I had a single 15 in a sealed box in my 89 MGM way back when. I fed it a ton of power and it was pretty damn loud.

    IMO you need a lot of power to overcome the mass of the trunk and thick seat padding.

    I also had it in a large box, probably would have held 2 15”.
    2017 Buick Enclave 3.6 (Burgundy/Beige)
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    if its got tits or tires it's bound to give you trouble

  12. #12
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    Quote Originally Posted by gadget73 View Post
    problem with subs in the cabin is you can't put people or other stuff in there. I've honestly given some consideration to cutting the rear deck and installing a 90s factory subwoofer enclosure.
    Yeah, that just doesn’t work for me. I like things to be hidden. A lot of new cars with premium audio put the sub deep in the dashboard. Both of my cars are setup this way. One has Bose and the other Harman Kardon.
    2017 Buick Enclave 3.6 (Burgundy/Beige)
    2019 Volvo S60 Inscription (Crystal White / Blond)
    Past Panthers
    1989 Grand Marquis LS (Cabernet/Grey), 1989 Lincoln Town Car SS (White/Blue), 2004 Mercury Grand Marquis Ultimate (White/Black)

    Quote Originally Posted by Lincolnmania View Post
    if its got tits or tires it's bound to give you trouble

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