Thinking it would not work, I bought this $3 cable on ebay that has a guitar lead on one end and a 3.5mm headphone jack on the other. Lo and behold, it worked with everything I plugged it into, from a cheap Bluetooth speaker to my home stereo system. Its a great way to practice anywhere with a bit of extra sound, or to practice at the park hoping someone will throw some cash in your case, haha. I even use it at home if I want to play and watch a movie. Didn't know if this was common knowledge and I was out of the loop, but I'm sure one of you can benefit from it.