How to hook up two sound sources?

[kjbalto]

I'm using a laptop in my jukebox with an elo touch screen and a small motorcycle amp I bought on ebay.  It's the mameroom design, but with a touchscreen.  I'm using two car speakers that are built in. I have the Y cable I bought from radio shack that goes into the sound card on my laptop and into the amp. The two car speaker are plugged into the amp.  My question is how can I have this setup, and also have it setup to use a home stereo with those speakers.  I'm making another jukebox for a friend and it has two car speakers like mine, but he wants to use his home stereo.  I thought it would be nice for him to have it setup so that he can use his home stereo at home and if he takes the jukebox somewhere else, he can use teh speakers on the jukebox.  Are there dual sound cards that can use two sources for this reason?

[BobA]

Can you use line out and speaker out?   Use the speaker out to drive the internal amp and line out to drive the home stereo amp.  Line out is an unamplified signal that a home stereo should be able to handle.