Legendary 200 watt mono-blocks. These are beyond rare and most people keep them once they find them. These have been completely gone through and have had the bias pots replaced with better ones. Important! Please read... these have a balanced input as I was using them with my Vitus Audio gear which is fully balanced. These create one of the most real sounding presentations in my room and the low end is simply stunning, with so much texture and nuance that seems so difficult to find in solid state designs. The mid-range and high frequencies are the best I have heard with my Audiomachina Maestro GSE loudspeakers and Vitus Audio Masterpiece digital front. All cables and power conditioning by Jena Labs. If you have been looking for a set of really clean EAR 549’s do not miss these because you will wait many more years to find another set. All the tubes are new or NOS.