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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!
badboss429

Showing 1 response by 76doublebass

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76doublebass
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I use to own an ARC SP6B many years ago.It is factory set at 47k.What is the output of your cartridge in Millivolts?
If its 2.5Mv or lowere you may need to purchase a pre-preamp to get sufficient output.I used a Music Reference head amp to output my moving coil that needed the 100 ohm load.
If you have very specific questions that need addressed I would contact Lenord at ARC.He is very knowledgable of all the classic ARC pieces and he will gladly assist you over the phone.He has helped me several times and is a kind soul.
I don't think on this preamp you have provisions for changing resistor values internally.
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