The Mastersound Compact 845 is not just another copy of a tube amplifier. A Mastersound amplifier is sonically unique in its own right. After all, they have been making transformers for a very long time, and the Mastersound Compact 845's heart, its transformer, is from the same high pedigree.
The Mastersound Compact 845 produces a rich, full-bodied sound, with excellent transparency and resolution in the midrange. Yes, there is a lot of detail present in the midrange, it doesn't just include voice, and these are presented by the Compact 845 superbly. Overall, a weighty presentation with beautiful dynamics, not the dull and flat sound which some mistake for lushness. Some amplifiers may sound "lightweight" when played side by side with the Mastersound Compact 845.