Connecting a Guitar Amp to my MacBook Pro

Discussion in 'Digital Audio' started by bli625, Mar 18, 2010.

  1. macrumors 6502a

    bli625

    Joined:
    Mar 8, 2009
    #1
    I have to do a show in a few days and I have a MIDI keyboard in Mainstage. I need to output to speakers. Would it be possible to get a 3.5mm to 1/4" converter jack and plug a guitar amp into the 1/4" side so I could use the amp as the speaker. Would this blow the soundcard? I've been searching around but most things I have read just talks about plugging in a guitar and not an amp.
     
  2. macrumors 68000

    NoSmokingBandit

    Joined:
    Apr 13, 2008
    #2
    So you want to plug a cable into the headphone jack of your macbook and send the audio to your amp? That would be fine, though i dont think a guitar amp would sound best for a midi keyboard. It would be best to plug into the PA system if you can.
     
  3. thread starter macrumors 6502a

    bli625

    Joined:
    Mar 8, 2009
    #3
    Thanks for the quick reply! Yeah. So, PA system or guitar amp. I would just use the converter jack right?
     
  4. macrumors 68000

    NoSmokingBandit

    Joined:
    Apr 13, 2008
    #4
    Yep, just a 1/8 to 1/4 will do it.
    If you are buying a new cable to do this i'd suggest Monoprice. They have the best prices around and have always been very good quality from what i've seen.
     
  5. macrumors 65816

    sporadicMotion

    Joined:
    Oct 18, 2008
    Location:
    Your girlfriends place
    #5
    I've tried using a guitar amp in a pinch and while it worked, it sounded like utter crap. Just a heads up.

    A cleaner solid state amp will work better.
     
  6. thread starter macrumors 6502a

    bli625

    Joined:
    Mar 8, 2009
    #6
    Woule a PA system sound just as bad? I also have a pair of M-Audio AV40's. Do you think those are loud enough to play in a pit orchestra in an auditorium?
     
  7. macrumors 68000

    NoSmokingBandit

    Joined:
    Apr 13, 2008
    #7
    A PA system will be the best thing you could use other than a keyboard amp. Guitar amps are built to make guitars sound great, nothing else. PA systems have to be able to make everything sound great.
     
  8. macrumors 65816

    sporadicMotion

    Joined:
    Oct 18, 2008
    Location:
    Your girlfriends place
    #8
    A pa system will sound ok but really you should invest in a device designed for such setups. A good firewire device is your best bet. It will give you an output that is impedance and signal level matched to what a PA would need for the best possible sound.
     
  9. macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #9
    Not for a solo performance, not even close. What you want is a pair of speakers that have 12" bass and a horn tweeters. Each backed up with about 100W amp. And yes I said "two" the keyboard is likely stereo. But if you are not playing solo and will be down in a mix then you don't want to be loud. It all depends on the goal.
     

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