I agree about AC. Cleaner power allows you amp to run more efficiently. When that happens, you most certainly get better performance.
ROI. Where is money better spent?
Sorry if the category is not quite accurate, but i would like the opinion of the knowledgable crew here. I am shopping for a preamp and interconnects, source to pre, and pre to amp, balanced. I am not looking for any brand recommendation, but want to know that if i had some xtra money to spend, should it go into better cables or better preamp? Thanks and happy holidays!