Hi Ingvar,
Yes, this will all work, you can use Powerlink cables and splitters to link as many Beolab speakers as you wish to the Essence – please bear in mind that will only get stereo sound through all speakers.
Beolab 14 subwoofer gives better bass than Beolab 11, so you won’t need the Beolab 11 once the Beolab 14 is connected. Please click on my sponsor link at the foot of the page if you need any help with cables to get everything connected!
Kind regards, Steve.