Tube amps Gone? in Helix Posted July 17, 2017 For me it was a longer process from tube amp to solid state with frfr.Last week I sold my tube poweramp and replaced it with a ss poweramp (Crown Xli 1500) I use it with a 2x 12" frfr passive cab.With the tube poweramp I had always the headroom problem. That means at higher stage volume I got to much distortion from the tube amp.Now I can use my patches at every volume and the sound stays constant.The tube sound now comes from the helix and not from the tube amp. Sound was fantastic on stage !You have to use a good frfr cab or monitor e.g. friedman, matrix, gemini, ... then you don't need a tube amp anymore.A low cost pa speaker will not do it !I think you have to decide which way to go.