i just got a bass today but i dont have a bass amp. is it ok to play it threw a electric amp? is it ok if i use headphones through the amp?
Headphones or low volume will protect the speakers, just don't turn it up too loud.
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I've done it before when I was in a shit band in HS - borrowing the bassist's guitar to mess with. As said...
“Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are part of nature and therefore part of the mystery that we are trying to solve.”

-Max Planck

Yeah, headphones should save you the trouble as long as nothing's going through the speakers. Also, no matter how low the volume is, your speakers will be affected if they have to project such low frequencies, though it might take longer before they turn to putty.

Also, be warned, bass through a guitar amp kills your lows pretty bad, so you should at least get a little 1x15 to compensate ASAP.
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