How much gain is needed in a Phono Preamp for a 0.2 to 0.3mv low output moving coil?


I have been out of audio for 25 years and am now getting back into getting a system. I have looked at Manley Chinook, Ear 834p, and Audio research 5, 6, 7 Phono preamps, after reading thru many or post on Audiogon. All have about 57db gain to 60 bd gain. I have been looking at getting either a Dynavector 10x5, Benz micro Silver, Ortofon Quintet Black, or a used Benz Ruby Z (if I can find the money). Is 57db enough gain for the cartridges. I would also welcome feedback on the Phono Preamp. I am leaning toward the ARC PH7 or Manley. Either would be around the same price. I would prefer to stay with tubes. The turntable is a VPI Prime. Any help or opinion would be greatly appreciated.
128x128juke4u

Showing 1 response by dcbingaman

How much gain for 0.2 mv MC ?  It depends on the gain in your line stage and your amplifier, but I would say 60 db is a good starting point....I wouldn't go any lower, unless your line stage has 15 db of gain or better itself.  If you use a buffer / unity gain line stage (First Watt B-1, etc.), then you need more like 75 db.  The Pass Phono (XP-15 and XP-25) stages can provide that much gain with very low noise.  

Most toob phono stages give 50-60 db, and the quietest ones either use a step-up transformer or JFET's on the input stage (like the Pass solid state designs).  55 db is enough for a normal 0.5-0.6 mv MC, but marginal for a lower output cartridge.