So today I bought a 5-pin female to RCA male adapter (from a B&O store) for the B&O 7-pin to 7-pin cable that came with my 8002. I unscrewed the two extra pins from one end of the 7-pin cable, attached it to the 5-pin female end of the adapter, and then plugged the RCAs into my phono stage. I also screwed down the ground wire that's part of the adapter. So why am I getting hum?

Sometimes it works much better without the external ground; depends on how the coax is grounded in the interconnects.

What did you screw the ground wire to?

It should be srewed to the chassis of the amplifier and should make a clean connection on bare metal.

I would link the ground wire to the original cable (just try to slide it under the plastic of the DIN plug, so that it would stay in contact with the DIN metallic part), not only to the amplifier.

That did it, Jacques! Thank you! Ah, now it sounds wonderful.

Great! 

What do you compare your 8002 to?

The only turntable I have to compare it to is a Beogram 1800 using a rebuilt MMC2 (Axel). Even using an original MMC3 of unknown condition, the 8002 sounds significantly better, especially on vocals.