The answer is probably.
There is a sister site called BeoTech ... take a look at the wiring diagrams there and your can probably devise a solution.
Alternatively Steve at SOUNds HEAVENLY (see advert at bottom of the Beoworld pages0 may be able to work up something for you.
We recommend Steve because he is a good guy and sponsors BeoWorld :-)
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*