117 volts is an exceptable voltage.
If you have all your gear plugged into one circuit this may cause the voltage to drop to an unexceptable level.
Try running three dedicated 20 amp circuits to your gear. Plug the amps into their own circuits. everything else into the remaining circuit.
You can test this theory by running extension cords from other rooms (Other circuits) over to your gear. Grab a circuit in the kitchen and one where you plug in your washing machine. Use these two circuits for your amps. Plug everything else into the wall outlet behind your gear. If everything stays on you need more dedicated power at your gear.
If you have all your gear plugged into one circuit this may cause the voltage to drop to an unexceptable level.
Try running three dedicated 20 amp circuits to your gear. Plug the amps into their own circuits. everything else into the remaining circuit.
You can test this theory by running extension cords from other rooms (Other circuits) over to your gear. Grab a circuit in the kitchen and one where you plug in your washing machine. Use these two circuits for your amps. Plug everything else into the wall outlet behind your gear. If everything stays on you need more dedicated power at your gear.