What happens when you feed 18 volts into a 9 volt pedal?

Discussion in 'The Tone Zone' started by LEOVAN83, Apr 17, 2011.

  1. LEOVAN83

    LEOVAN83 New Member

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    Hey guys,

    I've owned 18 volt pedals in the past as well as 9 volt pedals, question is...

    What happens if you feed 18 volts into a 9 volt pedal? I guess doing this the other way around will not hurt the pedal or will make it run differently, but, will adding the extra juice on a 9 v pedal damage it in any way?

    Thanks!
     
  2. HOT TUBES 70

    HOT TUBES 70 Well-Known Member

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    YES ! DO NOT DO THIS !

    18v into a 9v based pedal will be instant trouble !

    Most common pedals carry a diode and a cap on the DC input , 18 v being put into a pedal that was never designed to handle that amount will result in burnt components and a big repair bill .
     
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  3. LEOVAN83

    LEOVAN83 New Member

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    Oh thanks man! Just wanted to double check on that. A friend of mine is going to let me borrow a Maxon OD9, and I was gonna try it in both 9 and 18 volts, but, I guess I won't be doing that! hehe
     
  4. Hollowbody

    Hollowbody Well-Known Member

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    Is there a way to solder some kind of resistor in the cable supplying DC to drop the voltage to the pedal or will that cause thermal or other issues?
     
  5. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    It's something that would be worth looking up on Maxon's website. A lot of Fulltone pedals are designed to handle 18v, as well as many others. It's supposed to increase headroom,introduce new dynamics, blah, blah, blah...
    Just make sure the manual/website/FAQ/Customer Support says it's ok for THAT pedal. But if you plug 18v into a pedal that can't take it, well, you'll soon be able to tell if silence is really golden. :)
     
  6. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    I nkow this is not supposed to be done, but what if accidentally I plugged 12v into a 9v pedal?
    Is it INSTANT damage and burned components, or if its plugged out instantly, could it still work?

    (I accidentally did that and never tried it again cuz I don't have another 9v transformer, my brother plugged it in to a 220volt outlet, and the transformer was for 110v so it pretty much melted).
     
  7. chuckharmonjr

    chuckharmonjr Well-Known Member

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    Gotta love fried wall wart. Its whats for dinner.
     
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  8. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    Mmmmmmm!!!!! Yummy! I'll take mine charred please.
    :) :)
     
  9. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    I think I fucked a couple pedals then...... Mother FUCKER
     
  10. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    "Accidentally"??? Ha ha. Yeah, right! Save your lies for the ladies, my friend! :naughty: Curious little bugger! :)
    Like I said above, check the info for EACH specific pedal to find out what kind of power supply is allowed/preferred. Some pedals are supposed to sound better at the higher voltages, but are made with the capability of running on 9v just because of the prevalence of 9v batteries. I'm going to venture a guess on this next part, so get out your salt:
    I bet the distinction between pedals that are limited to 9v and pedals that can handle 12,16, and 18v (and higher, in rare cases) is based largely on the line between digital and analog effects, with a further subdivision into the quality of pedal design/build.
    If you find that your pedal is built for it, you may discover a whole new pedal hidden inside your old one. In which case, let that MoFo ride the lightning!
     
  11. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    haha the thing is I didnt even LOOK at the transformer.

    What my bro did, was plug the 110v-9v into a 220v socket, and burnt the transformer.
    He found another transformer lying around that I thing it was for a cordless phone or something, and put it back where I left my 9v transformer. He never said anything, he thought it was the same.

    I plugged it in a MT-2, and made a LOUD horrible sound, so I unplugged it thinking what the hell happened. I look at the transformer and I see it says 12v.
    I'm scratching my head thinking where did this come from.
    I asked my brother and he confessed that he replaced it cuz he forgot to plug the 110v-9v into a 220v-110v transformer (I know, I bought the transformer there in the US where the voltage is 110, and here in argentina its 220v).
    He didn't say anything thinking I was gonna get mad for burning the 9v transformer, but now I'm even more made that its possible that I fucked my MT-2 and a BOSS ME-50. (I don't really use these pedals, but I was counting on the money to buy something better, now I'm at $0) :(
     
  12. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    (by the way, my brother is a drummer, which explains his lack of knowlegde for these thing lol)
     
  13. brp

    brp Well-Known Member

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    The pedal is definitely NOT going to instantly fry neccesarily just from plugging in a 12v adapter. It's more important that the polarity of that 12 volt adapter was correct for the pedal (center pin negative?).
    Can you put a 9v battery in the pedals and see if they work with that?
     
  14. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    I guess I can try that. The thing is I don't even waste my money on those batteries cuz theyre too expensive here. So you get an idea, its as if I told you one of those batteries would cost you 20 dollars. Ir pretty ridiculous, so I soon as I get a hold of a 9v transformer I'm gonna try it out.

    And yeah, pretty sure the polarity was correct (I hope lol)
     
  15. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    Damn, dude! That sucks! I don't know of any regular Boss pedals that will handle 12v, but some things will "survive" it for a short time.
    I won't make a list, but my little brother fucked up a TON of my stuff and never said anything. Some of it he still denies to this day, that lying little cocksucker. In the movie, Han Solo had TWO arms. Why did my action figure have one?
    Oh well. I don't know the laws in Argentina, but in the U.S., you're not allowed to shoot family members.
    The damage to your pedals MAY not be as bad as it seems. It's possible that the guilty adapter had a reversed polarity to what the pedal needs to work it's magic on your sound. That might not do any damage, but could make the sound you're describing. I wouldn't toss the pedals until you try them with a battery or new correct power supply.
     
  16. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    Ha ha! See what happens when you take too long to post a "Quick" reply?
    :)
     
  17. V-man

    V-man New Member

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    FWIW, MXR states that you CAN go 18v into their 9v carbon copy (which gives more tonal options). I asked the tech myself after reading and this was confirmed, BUT after asking if my 104 Distortion plus could do the same, I got a definite "NO".
     
  18. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

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    Yeah you cant really shoot family members here either... lol

    Well I hope it survived then.
    As soon as I try it Ill come back to thisa thread and update the results.


    thanks!
     
  19. marvar

    marvar New Member

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    How many of you guys really check the voltage on those adaptors?
    I decided to measure my wall warts-
    Out of 6 I checked, only 2 were really in the 9 volt range, the rest ran anwhere from 11 to 17 volts, ALL OF THEM WERE MARKED AS 9 VOLT 200MA !
    The worst offenders were the BOSS PSA consistantly running in the 17 volt range.
    You might already be putting more than 9volts into your pedals!
     
  20. Marshall & Moonshine

    Marshall & Moonshine Well-Known Member

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    Once again, Voodoo Lab pays for itself.
     

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