From: bigus@fakedomain.fake   
      
   Hi   
      
   I have a small portable speaker, designed for taking input from   
   smartphones and the like, that I want to use to feed my electric guitar   
   through.   
      
   If I plug the guitar in, sounds does come through but it's not loud   
   enough. I've googled around for simple preamp circuits, and there are   
   many out there, however they all seem to be 9V.   
      
   I'd like to house the preamp in the speaker itself (there should be   
   enough space) and drive the preamp from it's batteries, which are 4.5V.   
      
   Pushing my luck here but does anyone have or know of a 4.5V guitar   
   preamp circuit or know whether it's likely to be feasible?   
      
   Thanks   
   Bigus   
      
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