I just purchased the following Bryston products:
1.Bryston 4B3 cubed power amplifier which puts out 300 watts per channel at 8 ohms and 500 per channel into 4 ohms. I've had this amp for 4 months and am enjoying it very much. I am driving the Martin Logan 11A Impressions. The sound is powerful and clean.
2. Bryston BP-19-preamplifier. The preamp is very clean sounding and does not add any unwanted sound to my set up. The preamp is dead silent. I've had this for two months and am happy with my purchase.