Standard Power trio setup: Guitar/Vocals, Bass, Drums.
Guitar uses 3 amplifiers and a pedalboard, power required.
Bass can run on house amplifier, PA system, or amplifier can be provided. Power for pedals needed.
Sound system requirements: Amplification for Vocals and reverb required. For larger venues, a line for bass is needed in addition to microphones for the guitar amps and standard Drum mic setup.
For small to medium gigs a PA system can be provided.