Protection for the power amp section of a 20 to 50 Watt (two power tube) or 100 watt (four power tube) amp.
Includes transient spike protection, grid current protection, protection against blown speakers, and AC voltage surge protection.
This is a really popular kit and tested for a long time. It increases tube life at least twice as long, and does not change the tone of the amp at all.
We developed this when building custom amps for the Southern California Metal Bands of the the 80's. They were eating up all the good tubes and at the time, there were NO MORE TUBES TO BE HAD! (no Sovtek yet.)