jrdg concerto vs nuforce 9.02

For starters, the Concerto is either a preamp or an integrated while the Nuforce 9 is monoblock power amps.

The Concerto uses the ICE power amp modules, so it's more than just a normal evolution from the Concentra. I have the Rowland Concerto pre with the 201 monoblocks, which is effectively the Concerto intergrated. But have not heard the Concentra pre. I did listen to the Nuforce 8's vs. my Rowland 201s and preferred the Rowland. But the 9 may be a different story.