1.5? never heard of that one before I would use stand audio L-R connections, unless your hearing is super sensitive i dont think you would notice the difference. I heard optical is pretty sweet but if you on a budget then the standard is the way to go. Ive always had good luck with philips if you wanna check their mini home theatres out (5.1) they work well. they support component too, but i dont tink they support optical (well they didnt use to)

the optical are the only way for you to get true 5.1 sounds from xbox. your amp or speaker should also have optical IN and capable of decoding Dolby Digital signal.

well, xbox360 support Dolby 5.1 by optical output only. the analog will have dolby surround for 2.1 setup.

so, if possible, get a speaker set with optical input support for 5.1. exp like klipsch DMX5.1D, logitech z680 or z5500.

for speaker like edifier R501, it's only a speaker set with amp and doent have dolby decoder built in. so u cant connect ur xbox360 to have 5.1 srround sound. cuz this type of speaker need a computer soundcard that support analog 5.1 output (with 3 deferent connector, green, balck and orange) cuz the surround sound is decode by the soundcard it self and outpu it to deferent position's satelit speaker. unless u get an external soundcard or decoder unit like creative extigy or DDTS-100.

or u may try to look for creative inspire GD580 as well if wanna cuz cost. it should be about RM800. i saw it early this ear at lowyat.

hope u guys understand what am i talking about... kindergarden standard english... pay sey~~~~

but have to check properly first. dun wan after purchase only realise the amp didn't have OPTICAL IN.

OT some, today i bought another optical cable for my xbox1. come back only realise one end head different from the another end.   one like normal optical end, another look like this:

lucky it can still be used, just that i have to tape it to the xbox connector.