I had the P5, it’s no match for the A21+. The P6 doesn’t seem like a huge improvement, though a bunch of minor improvements could be worthwhile
Whatever preamp you chose, make sure it is True Balanced and connect the amp/pre with high quality XLR cable: I use WireWorld
hth
Whatever preamp you chose, make sure it is True Balanced and connect the amp/pre with high quality XLR cable: I use WireWorld
hth