Single end pentode, using a pair of EL-84 output tubes, and a single 12ax7 driver, it puts out 3 wpc, and supports both speakers and headphones, The amps builder is Justin Weber It is a California based company. Build construction is first rate, infact one may say it is over built It is like a mini tank. It is a no nonsense build with component matching for sound, not big names to advertise. The 910 dollar price tag would be hard to beat for a tube amp made in the USA that supports both Headphones and speakers. It sounds wonderful, it has a full balanced sound with superb detail retrieval, and decay, The highs are extended without being harsh, mids are fleshed out with wonderful bredth, and the bass is deep and tight with nice control.