The XITS Piper XTB30 Guitar Amplifier Head (2014) is an EL84 amp Handmade by Mike Koski in North Liberty, Iowa. This is as boutique and rare as it gets! Mike said that this is the best amp he's ever built! All of Koski’s XITS amps use custom wound Mercury Magnetics transformers, NOS Allen Bradley carbon comp and PRP resistors, SoZo tone caps, and Mallory filter caps. Everything is true point-to-point wired in an aluminum vented chassis, handmade by Koski himself. As far as Tone.... this is as 3D as it gets, with incredible touch sensitivity!