In my complete ignorance I thought that as the red wire didn't go anywhere it was there to confuse the B&O system that it was B&O that was present -- from what you are saying, Peter, this is a one side of the stereo only arrangement.

This is rather annoying to say the least. The 8000's have RCA compatibility and fire up on a signal (according to the manual) is this likely to happen with non B&O sub-woofers. A Non- B&O subwoofer should be the easiest to put in the system because of the abundance of active equipment.

In an RCA arrangement you would expect two pins and not one and the sub-woofers would have two sockets to take left and right. Do you think this was drawn this way to illustrate the wiring of one of the pins with the red and (another)ground going to the other pin?

Before anyone is attempting to make this PL - RCA cable, it is not going to work!!! The wiring on the PL-plug is mirrored.

The blue wire should go to pin 1.

Red wire to pin 4. 

It doesnt matter what plug you use, 7pin AUX or 8-pin PL.

Both will fit and work.

In this drawing pin4 (solder side) is your right signal, pin 1 is your left signal. Pin 3 (blue wire) is not used.

1st, I know the signal-out leads from the pins of PL and DIN-AUX are mirrored or in an opposite way.

2nd, the drawing I was refering to, the one Beobird posted and made by you, says the PL-out goes to the sub. (Which is the right thing to do)

What is confusing me is that you say it has to be connected through AUX, which is not right. Because:

3rd, the A.AUX (not the PL) of a BS9000 is a fixed signal. Volume of the BS9000 is not relevant. If you connect these leads to any sub, the volume is not controllable, thus very loud in this case.

To resume, the A.AUX cannot be used. The sub has to be controlled through PL.

Yes, and the right way to connection a sub to day 2008, also to Beolab 2 er.

Wiring diagrams. Forbindelse af Subwoofer til B&O's Power link. Eks:

Peter Pan.