Here is from review of Don Shaulis in Stereo Times:
"Some would describe the Spectron as tube-like. Tube fans would cryNo! The operative word here is like. While the Spectron does not have the full bloom (or exaggeration) of tube amplifiers, neither does it have the dry and clinical presentation of many solid-state amplifiers. What it does have is a well-balanced and even presentation with engaging warmth. I think of it as a neutral presentation with a smile. The top end is extended but not edgy or harsh. The middle range is full-bodied, detailed, and intimate. At the lower end there is power and control for remarkably solid, well-defined bass slam as well as the finesse to define an upright bass with all its subtleties and nuances. I found the soundstage to be spacious and deep but clearly defined and reflective of the respective recordings.
The Spectron virtually carves audio scrimshaw at all octaves while providing the power to drive difficult speaker loads with exceptional dynamic range. But dynamics without control is just noise. For all the dynamics displayed by the Spectron, it never ran wild or became harsh. It exhibited absolute control over my speakers where other amplifiers failed. I never experienced listener fatigue (if you dont count the sleep lost by listening to more music instead of going to bed)."
I feel that this reviewer put in words exactly what I feel.
All The Best,
Rafael