A silent stage can often be rough for a bass player as low end sound is felt as much as it is heard. The Backbeat is a product that returns the feeling to playing bass by conducting the sound of your instrument through your body.
Pros: Portable and powerful with the added convenience of a built in headphone amp to power your in-ear mix. Low end sound is felt rather than heard to lessen the impact on your ears.
Cons: Vibration takes a while to get used to.
Bottom Line: While nothing can fully replace playing through an actual amp on stage this is a great alternative to blowing your ears out in headphones.