Originally Posted by AstroSonic
I moved recently and waited about 2 weeks for the moving van to arrive. Had my bass, but the amps were in the van. Previous owner had left a ss receiver and a pair of cheap 8-inch 2-ways. After a few days I was climbing the walls without playing. Got a 1/4 inch to rca adapter at the local Radio Shack. It worked just fine on the aux input. Had to turn the volume up quite a bit, but was able to get enough output to push the speakers to the limit. I can imagine that some basses might have insufficient output to drive the home stereo amplifier. Certainly you can do no harm. With your stereo, you should be able to get some pretty nice hifi quality sound. Probably difficult to get any tube overdrive sound without endangering the speakers. If your bass has insufficient output to drive your stereo electronics, consider a stomp box. The Aguilar Tone Hammer works very well.
You can do huge harm to the speakers. When you crank your favorite music it is so compressed it doesn't stress your components.
Were you to crank a wav file of the same recording you'd think your speakers might blow.
So no it shouldn't be able to do what you ask except for very modest volume.
For some folks on a limited budget this can mean saving for a proper amp AND repairing or replacing the stereo speakers.
Since the world didn't end let me say until it does the more sound, actual musical tone, you can get out of an unamplified bass the better and more tasteful you will be live and loud.