Finished Pieces

Audio Jacks and Volume Control

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    13 Responses to “Audio Jacks and Volume Control”

    • 1

      cheft said:
      March 11th, 2010 at 10:10am #

      Can you explain the purpose of the 10 ohm resistor and the consequences of not using one?

    • 2

      casper said:
      March 11th, 2010 at 1:19pm #

      The 10ohm resistor matches the resistance/impedance of the speaker that has been removed. All you need to know is that without it the sound may be distorted. In some cases it will work fine without. It’s a case by case basis. If it’s distorted, add a 10ohm resistor and it will probably be fixed.

    • 3

      chris said:
      June 5th, 2010 at 6:50pm #

      is the transistor connected to lead or ground

    • 4

      Ryan said:
      February 24th, 2011 at 5:02pm #

      If a 10ohm resistor is not to be had, would it be best to put one as close to 10 as possible, or non at all?

    • 5

      Ryan said:
      March 8th, 2011 at 10:39pm #

      Would this work the same way with putting in an XLR plug?

    • 6

      Rolbista said:
      January 26th, 2012 at 5:46pm #

      will this modification give me line-level output? I have a Casio SA-65 and I want to drive a fuzz with it, but signal taken directly from the speaker cable has wrong impedance and doesn’t distort much.

    • 7

      casper said:
      February 16th, 2012 at 8:26pm #

      @Rolbista:
      I’m not sure what you mean by “taken directly from the speaker cable”. You mean a cable connected directly to the two leads of the speaker while it is active…? Or from the board after the speaker has been removed? The 8 ohm resistor to ground can be helpful and sometimes a limiter resistor in series will help too. The output to the speaker must be hot enough to drive a speaker. That is a lot more signal than a guitar puts out so this will commonly cause problems with certain un-buffered pedals (which distortion pedals often are. Try taking the signal out BEFORE the transistor. This will give you the pre-amplified signal which might be the perfect level for your fuzz.

    • 8

      Joe said:
      June 7th, 2012 at 1:20pm #

      i just replaced a speaker on a vtech laptop with an audio out jack… It was once noisey as could be, now i can barley hear the signal out of the jack… Any ideas?

    • 9

      kian s said:
      February 19th, 2013 at 4:32pm #

      So mono jacks DO NOT function as switches? In other words, if I want to have the speaker sounding when no plug is in the jack and not sounding when a plug is inserted I have to use a stereo jack that switches it on and off? or can you do this with a mono jack too?

    • 10

      casper said:
      February 19th, 2013 at 5:24pm #

      @KLAN It actually has nothing to do with whether it is stereo or mono. If you want to use a jack as a switch you need a switching jack. These are audio jacks with switches built into them. These are available in mono and stereo.

    • 11

      casper said:
      February 19th, 2013 at 5:25pm #

      @joe…….maybe the batteries are low?

    • 12

      Pandya PAvan said:
      April 24th, 2013 at 2:23am #

      can you please teach hou to connect casio SA-45 with computer………..

    • 13

      Daan said:
      December 2nd, 2013 at 3:51pm #

      Hi, I’ve been trying to add a jack output to my coleco talking teacher but I either get sound both from the speakers and the headphone or only one of both works. So I can’t get it that either the headphone works or the speakers.. Any ideas/ help?

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