Using the VOX AC15 Custom is easy. First, connect your guitar to either the normal input jack or the top boost input jack according to your preference. You can adjust the master volume to control the overall sound level, and use the tone cut, bass, and treble controls to shape your desired tone. For the tremolo effect, adjust the depth and speed controls. When using the spring reverb, you can set it to add a nice ambient touch to your sound. As for the foot switch, it can be connected to the foot switch jack to control certain functions. When it comes to maintenance, keep the amplifier in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. Periodically check the tubes and make sure they are properly seated. If you're not using the amp for a long time, unplug it from the power source. And remember, the VFS2 foot switch is sold separately if you want to add more control to your playing.