I have been enjoying my new Quilter SuperBlock for a few weeks, so I decided to plug in my VHT Special 6 head to make the dreaded tube vs. SS comparison. I did the comparison using a 1x10 cab with a Jensen C10Q. I used a Keeley Reverb pedal with the VHT and the on board reverb with the Quilter. The VHT Special 6 is a great Fender-ish sounding 6V6 tube head when it is used in it's sweet spot. I can easily get an almost identical sound and feel from the Quilter SuperBlock with the voice switch in the 57 position....... with two more voices left to explore. The Quilter and the VHT both respond in very similar way to overdrive pedals. (surprised about this one) The Quilter also can do humbucker equipped guitars much better than the VHT does. So, I'll go ahead and say it..... the Quilter is very tube-like. The magic is in the limiter knob. I'm not sure about the tech part, but it gives a nice feel to your playing. Bottom line..... if I had the SuperBlock a long time ago, I would have a lot less gear..... it really does make everything sound better.