Up for sale is a pristine Quicksilver intergrated tube amplifier. This unit is the most recent version Mike makes. It has under 50 hrs of run time. I purchased it from the original owner, who never used it. I purchased it because I love Quicksilver equipment, have a lot of it, and frankly just wanted to hear it. As is all Quicksilver equipment, it's simple, clean, and sounds amazing. My opinion is it's best for small drivered and efficient speakers. I believe the best sound is achieved with a bookshelf or small floor standing speaker. I have hooked it up to many different speakers, and this is my findings. I don't think they are limited to only efficient speakers despite the low wattage. There is one little mark on the volume knob which was there when I purchased it. I have the original boxes, packaging, and manual. It is currently hooked up and ready to demo. Currently powering a pair of mirage m290is. However, I do have some older infinity floor standing speakers that can be hooked up and are listed for sale. This amp is perfect for a small space, and the right pairing can provide a jaw-dropping sound