Got this for Christmas, been playing around with it along with the American sound. They both do their own thing, and do it pretty well. I have landed on the American Sound doing a mild overdrive that is softer. The California has a bit more treble and bite. Both are very touch sensitive, breaking up the more you push them. I recorded a sample. Played on my Ovation Magnum III bass into pedal chain. Only effects used on recording are Joyo Dyna compressor, Donner boost killer, then the american or california sound, SVT settings on a Sansamp deluxe bddi. ran straight into my presonus interface with no editing in the software. The 3 riffs are as follows. Clean, American, California. Enjoy. Pardon the sorry pick-style. I'm learning.