I owned both many years ago. For me the PV11 can not be compared with the PV9a the PV9a was a much more musical preamplifier, with a better sense of bloom, space and scale, much better dynamics. The PV9a was noisier than the PV11, but if properly matched was a fantastic buy - hifi is much more than signal to noise ratio! Do not match it with an high gain amp and high efficiency speakers. BTW, I used them with a MV125 and Sonus Faber Amator / Quad ESL63 fantastic systems.
Even technically , there is no doubt the PV9a had a suspended chassis and much better coupling capacitors. The volume potentiometer was much better in the PV9a.
Regards
Francisco
Even technically , there is no doubt the PV9a had a suspended chassis and much better coupling capacitors. The volume potentiometer was much better in the PV9a.
Regards
Francisco