Maybe the success of Chris Church put them out of business. I have an old Boost Box, but despite the higher gain it is not nearly as well designed as the ST-9100 (I love that you can attenuate as well as amplify with the ST-9100). Chris Church ripped out the pain in the butt coiled output cable in my Boost Box for me and put in a 1/8 jack, but said that the quality of the amp was not exactly stellar.