The KatCab UA External Amp Mod will allow your Boss Artist, Mesa Boogie, Fender, Line 6, Peavey, Marshall, Blackstar, Crate or any combo amp to be used as a speaker cabinet for an external amp. With Speaker Cable.
Step by step install instructions, https://youtu.be/OqzldnJxb4o
KatCab UA options:
1. Internal amp
2. External amp
Connect the external amp speaker out to the KatCab UA to use the combo amp speaker(s).