“This is a twenty four digit Alucard-Krankenstein”, Spider said somewhat obviously, “What if we're chosen to have our bags checked manually”?KRANKENSTEIN. 4-6. CHADWICK SERIES. 7-10. Warranty. Your new Krank amp has a limited lifetime warranty that Carefully read the Ohms switch instructions. Manuals and User Guides for Krank Rev Jr. Pro 20W. We have 1 Krank Rev Jr. Pro 20W manual available for free PDF download: Owner's Manual