Has anyone here tried a 4B SST and a PP 120 or 300 for the center channel? Not to get into details..... but I am getting a 4B sst and PP to replace the 6B sst. I have heard nothing but good things about the 4B and not anyone using a PP 120 or 300 for center. Yet one more question. Is there a sonic difference between the 6B vs 4B in 2 channel? Who here has heard both and have some imput? I am more than happy with the match up with the Signal Cable connects and speaker wire....to the Brystons. I know these are not exotic ...... but the sound is top notch for me. In fact the Signal Cable workd so well I would say give them a try and see if they work for you. You have 30 days and nothing to loose. While the power cords had no plus for me on the Brystons...... the magic cord did have a good plus for my Denon 3910.