Up for sale is my Thunderfunk TFB420. This is a great solid state amp that lets your bass sound like your bass. If you've never played through one, you need to! NOTE: When nothing is plugged in, this bass amp emits a sort of whistling hum, which Dave Funk says is the input jack. However, if you plug a cable in, even without an instrument attached, it goes quiet: Edit: Now asking $400+shipping. PM with interest.