I had 600c and sold it for 700cx. Cx amps are darker sounding and smoother in the top and mid. The 600c had in compairson to 700cx, a sting in the top and slightly harder tone with a tendency to grain that 700cx had not.
I used the units with KPS 25sc. Later on sold the KPS 25sc and used KCT and KPS 28c. The cx series are better than c series IMO.
I used the units with KPS 25sc. Later on sold the KPS 25sc and used KCT and KPS 28c. The cx series are better than c series IMO.