I recently bought some portable Koss speakers for my MP3 player. They were only 3 bucks at this thrift store I like to go to about once a week. They are pretty small and have built in amps. The sound is so good. They take a couple C batteries for one but it's worth it. It's almost like having a mini-boombox to bring anywhere and it's loud. They have definitely made the last few sessions that much more enjoyable.