speaker/amp upgrade time

Discussion in 'Tunes!' started by pass1over, Jul 15, 2022.

  1. oldtexasdog

    oldtexasdog Junior Member

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    I installed a Kenwood DMX7706S Media receiver with 4 6x8 JBL GX speakers and a Kicker CX 360 watt 4 channel amp. Installer put in a special little kit so I can still use the door subs without the thump. Been VERY happy. I am into my music weather at home or on the road.
    BTW I also installed a backup camera hooked to the Kenwood. Love it!
     
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  2. Huberoy123

    Huberoy123 Junior Member

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  3. Huberoy123

    Huberoy123 Junior Member

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    If you are not going to put subwoofers in the trunk then I would definitely go with the kicker upgrade.
    I replaced my door subs with 6.5 speakers, replaced the upper door and shelf speakers, and put 2 -12 inch subs in the trunk. I added 3 aftermarket amplifiers and new head unit. I also disconnected the factory-installed amps. The factory system didn't sound that bad, but the new system is kicking.
     
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  4. pass1over

    pass1over I like it LOW

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    I need help understanding something please. I am learning about all the different ways to wire subs and amps. Found the schematic to wire 2 subs to a monoblock amp. I know if you wire them in parallel, you half their ohm load. So dual 2 ohm subs, wired in parallel, the amp would see 1 ohm.

    If the amp claims ...
    • 14.4V @ 1 Ohm: 400 Watts RMS x 1 - 800 Watts PEAK x 1
    Would each sub be seeing half of that RMS output? (if it really puts out that much)
     
  5. Huberoy123

    Huberoy123 Junior Member

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    Try this link. https://soundcertified.com/series-or-parallel-speakers-which-is-better/
     
    Last edited: Jul 26, 2022
  6. pass1over

    pass1over I like it LOW

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    picture didn't load, try again
     
  7. Huberoy123

    Huberoy123 Junior Member

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  8. pass1over

    pass1over I like it LOW

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    That's what I was thinking about the way it works, thank you for that. So I found an older Kenwood amp that my wife's cousin left. Going to test it to see if it works, and will probably end up using it, since it's free.

    Specs are:
    Rated power output (4Ω, 14,4V) 170W x 2 (20Hz ~ 20000Hz, 0.08%THD)
    Rated power output (2Ω, 14,4V) 250W x 2 (1000Hz, 0.8%THD)
    Rated power output (4Ω, 14,4V) 500W x 1 (1000Hz, 0.8%THD)

    So I should get 2 - 4ohm DVC subs, wire the coils is series and the speakers in parallel, which would give me 4ohm, and bridge them on the amp, for 1 - 4ohm output @ 500W, each sub would see 250watts. Like this. Is this correct?

    [​IMG]


    Or, I guess I could get 2 - 2ohm DVC subs and hook them up to use both channels and only use 1 coil per sub. This would cut the RMS rating of the speaker in half though, correct? Since I'd only be using half of the speaker.
     
    Last edited: Jul 26, 2022
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  9. Huberoy123

    Huberoy123 Junior Member

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    I installed mines several years ago. I bought 2 kenwood 4 ohm single voice coil subs and wired them to a Kenwood monoblock amp. The speakers and amp. came with wiring instructions and they sound good. Clear sound and will get loud when needed. I also watched a lot of install videos on youtube and purchased some used books on car stereo when I was building my system. The components came with good instructions, and their websites also had instruction manuals.
     
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  10. jewc75

    jewc75 S197 Junkie S197 Team Member

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    I run focals in the rear deck and doors, eclipse sub and amps in the trunk.
     
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  11. pass1over

    pass1over I like it LOW

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    The stock sub has a bolt that goes from the back side through the panel into the woofer magnet.

    Would it be total Overkill to epoxy a nut onto the back of my new subwoofers to utilize that bolt to hold it in better?
     
  12. Huberoy123

    Huberoy123 Junior Member

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    That seems like a good idea. I bought a piece of aluminum from Lowes and fashioned a brace for my enclosure.
     
  13. pass1over

    pass1over I like it LOW

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    Finished my install last weekend and I am thoroughly impressed. This is another one of those things I wish I would of done a long long time ago. I was pleased with the Shaker 500 system, but this takes it to a whole new level, it's just amazing.

    The equipment I ended up installing was:
    Kenwood KAC-7204 Amp - Rated at 500W @ 4ohm bridged
    2x Kicker Comp R 4 ohm DVC
    2x Rockford Fosgate P1683 6x9 3 ways for the doors (I left the rear deck OEM for now)

    I remolded the sub pockets to fit the Comp R's and only have to use a 1/4" spacer. I used the OEM wires, so the subs still plug into the door like they always have.
    [​IMG]


    I coated the entire back of the sub box with dynamat. Also finished installing dynamat in the trunk, from the back sheet metal to behind the rear of the front seats is covered.
    [​IMG]

    I'm working on modifying the OEM trim ring to go around them and make it look finished again.
    [​IMG]

    It sounds so much better than the OEM setup. The sound is so full and energetic now, I can't really describe it other than I am extremely pleased.
     
    Last edited: Aug 5, 2022
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  14. XJCasper

    XJCasper forum member

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    Those door subs look so good like that. If it were my project? I might have gotten a kicker grill and clean up the spacer to make it look closer to stock. As much as I prefer the door speaker grills? Would look nice with those subs exposed.

    Nice work.
     
  15. pass1over

    pass1over I like it LOW

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    Kicker grilles fo6t these look like a 6 legged spider, I don't like em.

    I'm searching for a grill that I like, but I might leave them open for now and incorporate just the OEM trim ring for now.

    Spacer is cleaner up and matches the profile of the speaker (the OD was way too big) and there's those notches I can't get rid of. I tried filling it in with black rtv, but each layer is a different color and stands out.

    Hopefully the trim ring fixes that
     
    Last edited: Aug 6, 2022
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  16. pass1over

    pass1over I like it LOW

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    Thank you! They render my mirrors useless, I'm pleased, lol
     
  17. XJCasper

    XJCasper forum member

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    LMAO...
    at the Kicker grills. Will be getting one to protect my 12". But they are rather ugly. I need with the crap that rolls around in my trunk.

    Used to have the SpundStream Tarrantula grill in theb jeep. Too much chrome but had to protect the speaker from my safety equipment. Always thought about refinishing it. Sorry. Squirrel
     
  18. Huberoy123

    Huberoy123 Junior Member

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    Welcome to the sound upgrade club. I had the same impression when I upgraded. I actually like the kicker grills. Happy listening.
     
  19. mustanger

    mustanger Junior Member

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    I installed a set of Kicker subs in my doors last year and had to use a spacer as well for them to fit. I'm also not a fan of the kicker grills, so have just left them uncovered. But to hide the spacer/clean that look up, I got some black elastic fabric from Joann Fabrics. They have it in different widths depending on how wide you need it. Just cut it to the length you need and you can either sew or staple it, then just slip it on the sub with the sewn side on the bottom so it's not visible. Pic attached. IMG_3745.JPG
     
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