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Thread: using guitar amps with keyboard?

  1. #1
    bledredwine is offline Registered User
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    using guitar amps with keyboard?

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    Is it ok for me to use my 100 watt tube amp with 4x12 cabinet with an S80 or other keyboard?


    I already have a B-52 AT-100 and can't afford buying another amp, but I don't want to ruin this (wonderful) amp.


    What would be reasonable if I am not performing loud music? Would the AT-100?

  2. #2
    mikeh is offline 2.5K Gold Member
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    It is not uncommon to run organ sounds through a guitar amp to get an overdrive sound (ie: Deep Purple). The main thing to consider is what sounds you will be using.

    Keyboards can go from shimmering highs to rumbling lows - which is why dedicated keyboard amps/combos normally have maybe a 6" and a 15" speaker.

    If you are using mostly organ sounds or some general pad sounds - then you could probably get by with what you have. If you plan to use piano sounds, brass sounds, etc a dedicated amp would work better.

    That being said - if you keep the volume low enough so you're not overdriving the amp, you may be fine. We all have to use what we've got to create the best music we can - if you can't afford another amp, then try what you have.

    An option would be to use the amp as a stage monitor and then run a signal to your PA for the room sound.

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    dementedchord is offline Psychotic State alumni ch
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    the only real problem is running it into open back cabs (not an issue for your 4-12") i'm only adding this for others that are considering it... you'll never get good bass outta an open back... so the tendency is to push it harder...and harder... till it farts and maybe goes up in flames...
    37.8% of all statistics are made up on the spot...

    hey give a guy some room... people are trying to evolve here... for crying out loud...

  4. #4
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    noisewreck is offline Sound Destroyer
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    Quote Originally Posted by dementedchord View Post
    you'll never get good bass outta an open back... so the tendency is to push it harder...and harder... till it farts and maybe goes up in flames...
    Man, that would be cool!
    Quote Originally Posted by George Carlin
    Think of how stupid the average person is, and realize half of them are stupider than that.
    Quote Originally Posted by Oscar Wilde
    All art is useless.

  5. #5
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    warble2 is offline Not an expert
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    I used an old Peavey KB100 with my S80...kicked very well. 15" bass driver and closed back of course. I still use it live with my Motif 8 and it still works very well for me.

    I've never had luck with anything under a 15" bass driver in amps for keys. I'm not familiar with the amp you have, but a guess would be that you might not get what you expect to from it running keys through it. Don't know - just a guess from my experiences with smaller driver amps.

  6. #6
    dementedchord is offline Psychotic State alumni ch
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    Quote Originally Posted by Travelover View Post
    I don't think that's a good idea.
    if ya want to play along that's fine but give the guy a reason... you afraid of the 4 12's or the tube head???
    37.8% of all statistics are made up on the spot...

    hey give a guy some room... people are trying to evolve here... for crying out loud...

  7. #7
    prestomation is offline Dedicated Member
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    I'm pretty sure there's no risk to the amp itself, but if you start pumping tons of low end through, you're risking the welfare of your speakers.

    Just like running a bass through a guitar amp.

  8. #8
    dementedchord is offline Psychotic State alumni ch
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    Quote Originally Posted by prestomation View Post
    I'm pretty sure there's no risk to the amp itself, but if you start pumping tons of low end through, you're risking the welfare of your speakers.

    Just like running a bass through a guitar amp.
    the only issue running bass through a guitar amp is ...

    A. it's a combo... see discussions above about open back cabs..

    B. the tone controlls are voiced for guitar so you may not be able to dial it in as well...


    as to pumping tons of lowend blowing things that could be said for any amp at some point....

    i once saw a 300 wt EV 15L voice coil shoot across a room from being driven hard buy a crest 9001...
    37.8% of all statistics are made up on the spot...

    hey give a guy some room... people are trying to evolve here... for crying out loud...

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