Pedrillo, Most likely the 5th lead from the Graham 2.2 is just to ground the tonearm body to the preamp chassis. It's a toss-up whether you would even need to connect it. With my RS-A1 tonearm, I had hum until I ran a ground wire from the body to a screw on the chassis of my preamp. With the Triplanar, the accessory ground wire just waves in the breeze, and I have no hum. So, if you have hum, find a way to attach that wire to your phono stage chassis. I now re-read your post and see that you are using the word "pin". Sorry, but it's the same deal. I guess you are looking at the 5th pin on the DIN plug. This is the pin that is sort of at the apex of the formation of 5 pins. That too, is for grouding the tonearm body via the connecting cable. The connecting cable may or may not have a free wire that is not within the shield or terminated with a connector. That's your ground wire. Alternatively the 5th pin may be connecting internally to the shield of your balanced cable connection. The shield will convey the tonearm ground to your phono stage.
What phono preamps are balanced
Since I am looking for a phono preamp with balanced circuitry and outputs, I would like to know what are my choices. I know of these: pass xono, ear 324, aesthetix rhea and io, bat vk 10, hagerman trumpet,........................................................................................................ but am not sure of the others like: manley steelhead, arc ref., tom evans groove, asr basis, acoustech ph1p, linn linto, cary 301 or 302, clear audio, herron vtph-1, art audio, whest p.20, zyx, artemis, ayre, clearaudio reference, rowland cadence, klyne, etc etc.Thanks for the help.
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- 46 posts total
- 46 posts total