Can you connect speakers to a guitar amp?

How can I connect a Vox Amplug AC30 guitar amp to speakers?

• I've recently bought a small Vox Amplug AC30 guitar amp, and I've been using it with headphones so far, however by my logic if it has headphone out capabilities it should also be able to connect to a speaker. However when I tried this, I could not get any sound out of the speakers. Yes, the speakers were on, and yes, the Amplug was connected (and also on). I connected an audio cable (the one with a standard headphone jack at both ends) to the headphone out on the Amplug, and the other end to a set of speakers. So what am I doing wrong? Also, my guitar is from the early 80s ('83 to be precise). Would the guitar's age have anything to do with this problem of mine? Thanks

• Answer:

  The problem is the circuit made to take the headphones and not meant for loudspeakers. Nothing to do with the guitar. It is a matter of basic signal strengths and 'resistance' in audio electronics. If to think you can drive a set of speakers, it would have to have an output for 4,8 or 16 ohms adjusted. The sensitivity of the speakers as opposed to that of a pair of earphones. Realize the size differences for one, as the diaphragms inside a loudspeaker (compared to that of the headphones) has to be driven with the proper signal strength to get them to 'move'. I'd have to know as well what the wattage rate of the speakers are. And, I'm not sure what you meant if the speaker were 'on' and if they were already powered by a preamp or not. That would negate everything anyway. Just wouldn't put out a signal or, create a serious hum and distortion. All in all, the amp in question would have to have some jack to indicate that it has a circuit built into it to accomodate another speaker 'out'.