Thanks for all your help man!   I declare this /thread SOLVED.    

Here are screen shots of the programme:-   Thanks for any help again.

*Update* ------------ I have found the software; VIA HD Audio Deck.  However, I can't seem to find anything that will let me adjust the crossover point. 

Thank you so much for your help!  I'll be using my onboard soundcard but it's a good one (similar to a £50 soundcard).  However, I haven't got any soundcard softeware.  I'll see if one's available now.   If I can't find one would this work?:-   P.S. The 2 connections to the left speaker...

How would I connect the sub though?   Like this?:-     What if the sub only has speaker cable inputs and outputs as opposed to RCA?  (The monitors only have RCA inputs):-  

This is really irritating me now... been searching the web inside an out.  Would this work or not?  Someone please help!  My proposal is connecting MicroLab Solo 7c's and a sub (haven't chosen one yet but it will be active) to my pc using these splitters (refer to picture below).   Here...

Thinking of getting these for my pc setup.  http://www.scan.co.uk/products/microlab-solo7c-110watt-20-high-fidelity-bookshelf-speakers-wooden-finish-with-remote-control Are they too big to use for this use?  I'll be about 20-30 inchs away from them for the majority of times on top of my desk...

bump

Thanks for the input (pun intended).  I haven't actually got the MicroLabs yet but, I just wanted to make sure that I would be able to add a sub if I felt there was a deficiency in bass.  So it's definitely possible?   I've currently got the Logitech z-2300's and the only thing I like about...

Erm, budget will probably be about £100-£180?  Maybe more, I'll be saving up for one if I think I need one.  I'm just worried now in case I don't get a sub that doesn't "match" from what blazer78 said, or do most subs match most speakers?

I'm so tempted just to go down the easy route and buy the Corsair SP2500's instead of buying speakers and a separate sub.  Am I best doing this or could someone shine some light on this and explain what I should get .  Thanks for any help.

What subwoofer would you recommend for these monitors then?  I'm new to this you see 

Thinking of getting MicroLab Solo 7c's and saving up for a decent subwoofer.  My question is simple, how would I add a sub to these monitors when I eventually get enough money together to buy one?  Here's the back of the 7c's: http://static.scan.co.uk/images/products/super/1783768-l-b.jpg  ...

Looking for a 2.1 set-up from 2 bookshelves and a sub (and an amp?).  Not too familiar with the audio world but I done a bit of research in the past couple of weeks... boy is it complicated!    Anyway, they'll be used for my gaming pc, for games, music (most genres) and the odd film here and...

any reviews on the Solo 7c's?