I will never ever get rid of my tube audio equipment. Preamp or power amp. I also will never ever give up my solid state power amp or preamp. They both have there own area's of sound reproduction plus and minus. I have 3 different systems each one of th has a tube preamplifier connected to a solid state power amplifier. Solid state for the deep more control bass and tube for liquid midrange and sweet silky highs.i also have system with just solid state equipment and one system that's all tube- power amp and preamp. Like I mentioned earlier they both have there plus and minus but I need both to make ears whole.