Just bought a Ampeg Portabass 800 to replace my GK Backline 600 and i am very happy with the replacement. Running it through a Gk blx 4x10 and a peavey 1x15. The increase in headroom was just what i needed and i finally found out i like the Ampeg sound better than the GK sound. Plus the double inputs give me a lot of options for my signal path. I also picked up the last Fulltone Bass Drive Mosfet in the New Orleans area as i believe they are discontinued. The guy at counter was kind of mad. He told me after he checked my out that he was planning on picking it up when he got paid. Well it"s mine now and is the best sounding overdrive i have heard on bass.