Hi and welcome to Beoworld!

The Beocenter 9000 and TV/Beosystem 2 use two different generations of connection system, Master Control Link and Masterlink respectively.  To connect them you will need a Beolink Converter type 1611.  You would connect this converter to the Beocenter using a 7 pin Aux Link cable into the Beocenter's AUX/TV socket, and then connect the converter to the Beosystem 2 using a Masterlink cable.

If you do this, you will then need to set up the components in the correct 'Option' settings for this to work.  The settings will depend whether the TV and Beocenter/Beosystem are in different rooms or the same room, so come back to us if you need further guidance.

I didn't answer the bit about the speakers.

As you quite rightly identify, Beovox 7000s are passive, hence the rely upon the amplifier that is in the Beocenter 9000.

The 8 pin speaker sockets that are fitted to the Beosystem 2 are powerlink sockets that are designed for BeoLab active speakers (that have their own inbuilt amplifier).  

Hence if you wish to connect your speakers directly to the Beosystem 2 you would need an amplifier, in which case you could use a Beolink Passive, like this: link

Passives are available fairly cheaply on eBay etc.

I would be tempted to leave the 7000s connected to the BC9000.

One simple solution to get sound from your Beosystem 2, is simply to connect it to the TV using a Masterlink cable, whereupon it will play through the TV's speakers. (deleted when Frog (below) kindly pointed out that the BV4 does not have speakers! )

The Beovision 4 doesn’t have speakers, so the best thing is to connect the Beosystem 2 to the beocenter using the converter that Guy mentioned. By correct option programming, you should be able to get the sound coming out of your existing speakers.

Presing TV on the remote will tell the Beosystem 2 to switch on the beocenter and play the sound through that. 

note you need the IR eye connected to the Beosystem 2. I hope you got that as part of the package. 

frog wrote:

The Beovision 4 doesn’t have speakers, 

Ooops! Thanks for pointing out my error! 😁

Thank you kindly to you both, I will give it a go and let you know how it works out.