The 6B will not run your Helikon, you need a step up. There is a switch on the back to change from 54 to 6_ gain. But it still is not enough and the higher gain setting is very noisy. It was designed for moving magnets. The 47k is part of the design and isnt meant to be changed like in a moving coil stage.
Help with phono cartridge loading/ARC SP6B preamp
My new Lyra Helikon has a recommended load between 100 and 47k ohm, and as I'm running it directly into my phono stage (no step up needed) I have been listening during the break in period without load. I assume my preamp is factory set at 47k ohm, do I have to remove the factory load resistors prior to installing the new load resistors (100 ohm or more)? If so, can anyone tell me where these factory installed resistors are located? A quick search of the preamp indicates they are not soldered to the RCA terminals where I plan on installing the new load resistors so they must be soldered directly to the circuit board? Can anyone with Helikon ownership experience suggest the ideal load? Thanks!