I have had my CSP2 Taboo combination for several months now. I first bought the Taboo, brand new from Steve. It was nice with my 89db Von Schwenikert monitors but you had to turn it up all the way. I added the CSP2, also brand new and what an immediate difference! It was as if the Von Schweikert's were floor standers. the CSP2 opened up the Taboo and overcame any resistance in the speakers because of their relative inefficency. The sound became more powerful, not just in volume, but in weight and authority. Bass was increased a lot. The CSP2 has the voltage controls for each channel that can adjust to your particular sound. I can wholeheartedly recommend this combination. There is NO noise and NO hum, even at full volume.