I am using the 5751 in my VTL 7.5 Sylvania Golds. I prefered them to the Early Mullards. All the body but more definition. Not a huge difference, but enough to make me prefer the 5751. I will add that the 5751 in my system was less mushy. I also switched to Telefunken 801s in my amps. I prefered my Siemens to the Telefnkens. I tried 2 different pairs of telefunkens, both highly rated. I still prefered the Siemens. It is a listening game. If you can't hear the difference save the money. I have found on many a "supposed" upgrade not be worthwhile. I could not hear the difference. I just moved on & remained happy.
Some good examples, I tried the Boston Audio Record Mat. I prefered the record directly on the platter. I tried isolation feet of different sorts under my SACD converter (not transport) and found that they muddied the sound or did nothing. Let us know what you find when you try some other tubes.
Some good examples, I tried the Boston Audio Record Mat. I prefered the record directly on the platter. I tried isolation feet of different sorts under my SACD converter (not transport) and found that they muddied the sound or did nothing. Let us know what you find when you try some other tubes.