Obviously, it isn’t portable for two reasons: Stoneware is fragile, and this amplifier requires more power than a reasonably sized battery could supply.
The included power supply is the maximum voltage that this amplifier can safely handle. It could be upgraded to a 10 amp unit, but I don’t think the added expense would yield real world (off the test bench) improvements.
If you have any issues or questions, please call, text, or email me. I appreciate your leap of faith buying this little contraption and I’m not concerned about warranties, etc. If you break it, I’ll try to make it good again in a painless manner. Just don't use the port as a thumb hole and bowl with it!
Thank you, Henry