No, you will have display in link rooms with a MCL-2AV. I have BL4500 connected to a MCL-2AV and the display works fine. Pentas and other speakers are connected to the MCL-2AV by PowerLink.
There are no normal speaker-out on a 2AV, only PowerLink, antenna and 3 AUX (CD, TAPE and TV-AUX).
The MCL-2AV is connected to the Beocenter via MCL cable, and hereby you can actualle get Powerlink, even if you music system does not have the outlets.
**edit, have added:
I am not sure about an MCL-2A, which is used with passive speakers. Cannot remember how many pins there are to each spearker, but will check when I get home this evening.
Living room: BV7-40 mkIV + V8000, BL5, BL3, BM1 and BS9000. Bedroom: MX3000 and BL4500 on MCL2-AV. Around: PentaIII, CX100 and MCX35 on ML/MCL + MCL2-A, BeoPort and BL4 on ML, BS3300 + M75 as stand alone, BC6000 + BC600 and BT1100, LC1, LC2, Beo4, Beo5 and BL1000, BS2 and A8, EarSet2, Apron, Coffee mugs, Enamel Bagdes, Bath towel, Keyring, Books, Lots of miniature and the Bottle opener. Office: BC2300 + BL2500 and BS3. Summer house: BS Century.
Addicted? Oh no.... ;)