By their very nature, the more powerful a speaker, the larger it tends to be.
In any event, any of the good online / high street PC retailers (ebuyer, dabs, PcWorld, Comet etc.) should have a fair selection for you to choose from.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation technologies coming to Siggraph 2017
iPad Pro 12.9 vs Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.