Concerned about my cart/pre pairing


Long story short..

I started with a Dyna DV20x2HIGH and a Dynaco PAS3x, then upgraded the pre to a Rogue RP-1. One day was cleaning my table and #%&%! up the needle, so I just coughed up the money for a new DV20x2LOW now that I had the Rogue's choice of higher gain setting for MC carts (58db). Purchased from a reputable local dealer. In reality when making the purchase I didn't know too much about how cart specs/phono stage gain, etc works (I'm just starting this HiFi journey), just went with what was suggested. Now, I notice that I really have to crank the preamp volume sometimes when listening to records and the output is definitely less than it was before. It still sounds good, but on the occasion I do crank the volume to near max (50-60 out of 60) I hear some noise in the upper ranges, maybe a little hiss. After doing some research about the subject I'm concerned that the 58db gain on the RP-1 might be too low for the 3mv rating on the cart, and I'm missing out on the best performance of the Dyna cart. Obviously when switching to my Bluesound NODE the volume output is WAY higher. 

So....at the end of the day I still enjoy the sound, but feel concerned about having to have the volume  so high, and wonder if I'm missing other things like detail, dynamics etc....or am I over thinking this?? Do I really have to invest in a new phono pre in the future? Was this not a good match?

Thanks in advance!
jin78

Showing 4 responses by jasonbourne52

Low output mc cartridges sound best with a good SUT. High gain phono stages suffer from too much noise when used with a cartridge putting out 1 millivolt or less! Since a SUT is a passive device it adds NO noise - unlike any active gain stage.
+1 for a SUT! I have several, including. a Bellari. This is an excellent USA-made SUT at a reasonable price! 
The only caveats regarding an SUT is that it must be grounded to the tonearm/TT AND the phono stage/preamp. 2: The IC from the SUT to the phono stage/preamp should be kept as short as possible. This is to avoid high frequency roll-off due to capacitive loading between the transformer secondary winding and the connecting cable. The interconnect cable between the lomc cartridge and SUT can be any reasonable length. A meter or two or three doesn't have any deleterious effect.
There is no advantage to using a high gain stage with a lomc cartridge because all such active stages add noise - something to be avoided! Properly amplified a lomc cartridge has a significantly lower noise floor than any mm or mi cartridge. A transformer is the best way to convert the high current of a lomc to the higher voltage required by a phono stage - all without adding more noise!