I used to own the 909. I used it with a a NAD C165bee preamp. I did not have the 99 preamp. However, I can tell you the 909 is superb and an extreme bargain for the typical audiogon price it sells for. Plenty of grunt to power your PMC OB1is too (great speakers BTW, I have the same ones). The 99/909 combo is unbeatable for the current going price. Good luck!
