I also own and Mac 352 and I find that the stock tubes sound best in my setup. I tried mullards{new stock} and found they did not sound as good to my ears as shock. There was more and stronger bass, but sounded congested compared to stock. It could had been I did not give the tubes enough break in time. I did get a noticeable good difference by changeing the fuse to a synagentic purple fuse. I prefer a more relaxed sound.
For an integrated Mcintosh MA-352 amp, CHOICE OF TUBES
I recently acquired an integrated Mcintosh MA-352 amp with stock 2 AX7 TUBES as well as 2 AT7 TUBES in the preamplifier section. I would like to improve the performance of the amp by changing the tubes to either Mullard, Tungsol, RCA or Valvo.
Do you have any suggestions to go in the direction of sweetness and musicality?
Thank you all.