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Cartridge impedance is 47kohm, a few semi-technical questions, I need simple answers

Posted by Hugh Jass on August 4, 2005 at 11:19:33

First of all I am not very good w/ tech stuff, so if any retired engineers named John post a response, please, I need it it layman's terms.

I just hooked up a new phono stage (Pro-ject Tube Box), I have a Grado Statement Sonata mm/47k. I came from a micro basic that had 2 setting MC/MM only. I actually had it set to MC as the other setting had no volume (is gain the right term?). Anyway that setting worked fine for what it was. I am still not sure if the microbasic was wired wrong or what, but it worked.

So now I have these choices on
the bottom of the tube box, which looks like this:
dip switches w/
mm/47kohm
mc/100ohm
mc/220 ohm
mc/1kohm

I am currently set on mm/47k. All Grados are MM. The thing is, I have my amp turned up more than with the previous stage, and more than with the CD player. Much more. It isn't past half way and I know this is a relative measurment, but it perplexes me. The Tube Box sounds good even though the volume is up.

Are all the other setting only for MC catrs?
Would it hurt (exlosion/fire damage) to try one of them?
Why do the directions say that "the Tube Box is factory set to operate in MM mode since most carts use MM principle", and then have what looks like only 1 MM setting?

Thank you, HJ

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