well, its 5.1 and its £50, tbh so long as it makes sounds and you can hear a whump from the sub then its working and thats what you get for that kind of money....
dont expect it to sound like your in your own personal cinema......if your lucky it might go reasonably loud, altho the sub might not sound too happy up loud.....
oh, however even the Sony UK site doesnt have this listed even on its knowledgebase for manuals...........so dont expect much help from Sony if it buggers up...lol
my advice? spend a little more on either Creative or Logitech speakers, they may be computer based, but they will be as good if not better than these probably....no guarantee tho...lol
Don't forget that £7.50 of that is Vat so only £42.50 represents the cost of manufacturing and shipping the speakers plus a profit for Sony and Richer Sounds.