Blackstar Fly3 Battery Operated Bass Amp
At less than three pounds, this little guy will give you a great sound at an outdoors gig or playing at home for fun.
You can jam using this product or listen to your favorite music by utilizing the line-in feature. It's a perfect beginner amplifier or made to order for outdoors busking type gigs.
I like the fact that I can run this guy for hours using three AAA batteries or get the additional AC power supply adapter for $20. At a price of much less than $100, this is the best all around product in its class.