Thank you Sam and Adam. The Cronus is a great integrated amp, and works very well with the SR-17.5s. When I bought the speakers, the impedance on the amp was set to 4 Ohms to work with the old speakers. The Silverlines have a nominal impedance of 8 Ohms, but it's an absolute nightmare to switch impedance on the amp as it has to be done internally, and there is virtually no clearance between the back wall and the screws. So I've kept the impedance setting unchanged, but wonder if it might sound even better on the 8 Ohm setting. The upgrade is dictated by a few factors: the Cronus was purchased as a temporary amp until I could upgrade to separates; I'm hoping for even more refinement, greater dynamics and better control of the bottom end, which I expect with more power and a separate preamp; I'd like to have ease of adjusting impedance which the monoblocks offer. Another big factor is my dealer's trade-in system where you can trade-in equipment for full purchase value within a year. I'm slowly coming up on that year, and it would make it much harder for me to upgrade later.
