NOS Telefunkens make any phono stage that uses 12AX7/ECC83 sound better. I am using them in my vintage Quicksilver preamplifier, also upgraded with Vcaps. The Q has some circuit design features that have fallen out of favor on the one hand (like use of NFB in the linestage) but has a hefty tube-rectified, choke input power supply on the other. It's quite surprisingly great with the upgrades. The VTPH2 gets so much love on these forums that I have to admit I am curious. Yet the circuit is rather pedestrian in general characteristics. Goes to show... something.