You do not need to replace the 509x since it is rather good. However, as someone who has recently did a head-to-head comparison with the Luxman m900u amp and the 509x integrated. I can say that to my ears the m900u is leagues ahead of the 509x, contrary to what I had read here on other threads..
The Luxman 509x is supposed to be the amalgamation of the c700u preamp and the m700u amp. The 900 series is at a much high level.
I did this comparison with the TAD ME1 speakers which I believe like some current. I should note that I heard improvements in sound even at the low to mid levels I was playing the system.
The Luxman 509x is supposed to be the amalgamation of the c700u preamp and the m700u amp. The 900 series is at a much high level.
I did this comparison with the TAD ME1 speakers which I believe like some current. I should note that I heard improvements in sound even at the low to mid levels I was playing the system.