My current phono preamp is the Jolida JD9, having started with the built-ins in my Advent 300 and NAD 7140 and moving through a Hagerman Bugle, Monolithic PS-2/HC-2b, and Vista Audio Phono 1. The JD9 was slightly better than all of them until I upgraded the op-amps to OPA637; after that, it was majorly better than all of them. Tube rolling makes a difference, but my experience is that it changes the flavor, not the quality of the sound. Any tube needs to be quiet, though; the JD9 will plainly reveal noisy tubes.
Plenty of gain for even the lowest output MC, plus high and low gain outputs plus plus resistive and capacitive loading plus unlisted unlisted DIP switch combinations for in-between loadings.
Lots of other tweaks possible besides the op-amps if you really want to get into it - hexfreds, output caps, better resistors. A pretty amazing piece for $450 retail.
If you just need straight, no muss no fuss MM 47K, the Vista Audio is tough to beat. It's the past one I've kept as backup and if I can ever get my second tonearm mounted.
David
Plenty of gain for even the lowest output MC, plus high and low gain outputs plus plus resistive and capacitive loading plus unlisted unlisted DIP switch combinations for in-between loadings.
Lots of other tweaks possible besides the op-amps if you really want to get into it - hexfreds, output caps, better resistors. A pretty amazing piece for $450 retail.
If you just need straight, no muss no fuss MM 47K, the Vista Audio is tough to beat. It's the past one I've kept as backup and if I can ever get my second tonearm mounted.
David