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Voltage Drop is GAY ... 148.1 with one 18"

Discussion in 'General Car Audio Discussions' started by JohnnyD, Sep 20, 2002.

  1. JohnnyD

    JohnnyD Full Member

    Well I hacked up the old box for my e15a's and stuck one RE 18" HC in their place

    11 cubes tuned to 40 hz ... got the RE 35.1 recently and man it sucks some juice

    I was tuning and you could just watch the SPL drop cause I was losing voltage so bad

    Oh well ... theres other stuff I can do ...

    I also found out that the 18 is too good for 8 regular sized screws .. It bent the heads on them all and jumped right out of the box when i first got it in

    haha ... the sub is a beast and it didn't even phase it, kinda funny to see it hop right out on some test tones

    I got a few pictures of the 18's making some other subs look like little girls

    http://briefcase.yahoo.com/bc/johne5ive/ls...Friends&.view=l

    Included in there is a picture of why UPS men are all homos and like other men

    The sub survived and got reconed ... doing really well right now so its all good

    I dont have any pictures of the sub in the box, but if you wanna see the old setup with the e15a's I can upload a few pictures of that wall

    Anyways ... I'm just talking .. Let me know if you got any suggestions ...

    148.1 is kinda loud already though hehe
     
    JohnnyD, Sep 20, 2002
    #1
  2. sandt38

    sandt38 Full Member

    What class and what are the regulations? I assume super street if you are running a wall. How many batteries, and what type, and what size alt? Power and ground upgrades I hope as well...
     
    sandt38, Sep 20, 2002
    #2
  3. Honest Bob

    Honest Bob Full Member

    aww, thats got to suck having a sub broken when you get it. 18" huh? I thought my 15's were huge...
     
    Honest Bob, Sep 20, 2002
    #3
  4. JohnnyD

    JohnnyD Full Member

    I know you'll hate to hear it, but no upgrades ...

    I'm getting a new car soon and dont care to put any money into it ... saving it all for the next install

    its a 92 accord ... so it has a sissy electrical system, 80 amp alternator i think

    whats going to make the strongest improvement besides an alternator?
     
    JohnnyD, Sep 21, 2002
    #4
  5. sandt38

    sandt38 Full Member

    Isolator/second battery. Both are completely transferable to the new car. If you are planning on competeing, get them.
     
    sandt38, Sep 21, 2002
    #5
  6. MMats4life

    MMats4life Full Member

    add another batt...that will help the voltage drop. you dont need the isolator.

    upgrade your battery ground and alt wires.

    if you are looking for pure spl... you may want to tune higher. what size port?
    is it in a wall?
    also if you were at a competition you should only be doing burps... this will help conserve some battery.
     
    MMats4life, Sep 21, 2002
    #6
  7. The_spacemonkey

    The_spacemonkey Full Member

    yeah.... and add more strain to the alternator.....
     
    The_spacemonkey, Sep 21, 2002
    #7
  8. JohnnyD

    JohnnyD Full Member

    wooo hooo ... i got a free deep cycle marine battery last night

    sandt .. whats the benefits of the isolator and what happens if dont use it
     
    JohnnyD, Sep 24, 2002
    #8
  9. sandt38

    sandt38 Full Member

    First off, if you have a starter battery and a DC battery, you need to use one.

    Second, the isolator isolates the batteries draw, and charge. When your rear battery needs a charge, the isolator charges only the rear, proportional to it's request. Same with the front. This reduces overcharge eliminating battery explosion possibilities (very minor chance, but it is still there), and prolonging the life of the battery. When you hit a 20Hz note and the 3000 watts you are running pulls down voltage you do 2 things. by seperating the front and rear battery, you maintain a 12 volt source to the alt (from the other battery) allowing it to produce proper current. If you rob it of input voltage it will make less current. Also, by leaving the front battery at full charge (remember, the isolator seperates the load) you eliminate light dimming, AC dropout and engine stumble just to name a few.

    Besides, they look cool :D

    [​IMG]
     
    sandt38, Sep 25, 2002
    #9
  10. Honest Bob

    Honest Bob Full Member

    ooo I want an isolator and 2nd battery now...
     
    Honest Bob, Sep 25, 2002
    #10