They are cookie cutter asian amps. Nothing special, but they will produce their rated power, and sound just "fine" doing it. I would place them at or below PG's Ryval line.
I been using a Nine 5 to run my mids and highs for about three months now and I like it alot. Ill be running whole system off it once I sell my Ti Elites and Fosgate Power 20001 bd amp.