Genz-Benz shuttle 6.0 bass amp that has been factory refurbished very recently and is in like new condition. You won’t find a better one.
Jeff Genzler and one of his main design partners still runs a program to do the factory refurbishment if you reach out to them via a bass forum and this has recently gone through that. The tube preamp sounds awesome and this thing is less than 4lbs but can fill a large venue when I run it with a 4ohm 212. It’s an awesome amp but I recently acquired a Genzler Magellan 800 and this one is now redundant.