How do I set up and connect my Marshall DSL40CR amplifier?

Place the amplifier on a stable, level surface with adequate ventilation space around it, avoiding direct placement against walls or in enclosed spaces. Connect the supplied AC power adapter to the amplifier's power input and then to a grounded electrical outlet with the power switch in the OFF position. Connect your guitar using a standard 6.35mm (1/4 inch) instrument cable to the input jack, ensure all connections are secure, then flip the power switch to ON and allow a few moments for the valves to warm up before playing.