Brutal Legend Wiki
Eddie purchasing the High Voltage guitar strings from the Guardian of Metal in the Motor Forge.
“I wouldn't play that in the rain if I were you.” — Guardian of Metal

High Voltage are Guitar Strings available for purchase in the Motor Forge for 225 Fire Tributes after the mission "A Number of the Beasts" is completed. They increase the damage and range of the Shocker attack.

As a side effect, equipping High Voltage will make it impossible to stun and thus Double Team Ground Urchins.