Why the 20A and 30A AC connectors, and can I get an adapter to connect to a standard 15A outlet?

North American MA-3600VZ and MA-5002VZ amplifiers have 30 amp molded AC plugs, and North American MA-2402 and MT-2400 amplifiers have 20 amp molded AC plugs to meet regulatory requirements. AC adapters are not recommended, and may not meet local code requirements. Contact a licensed electrician for more information about AC connections and electrical codes in your area.