I currently have a Yamaha a-s501 that I am using the preamp out of but I would like to get a separate pre-amp. I have a rega planar 2 with a bias2 cartridge. my speakers are klipsch heresy iii's. I would like to keep it around 500 and would it make a difference in the way my records sound or would it be a waste. I'm trying to get the hum out when I listen at louder levels it is noticible during the quieter moments. thanks to anyone that can help me out.