Using a sub with no sub out on my amp

I just checked, the 12" has no Port (my preference and advice). The 10" and 8" models have a rear port. If not near corners ok, but avoid them if possible to achieve the kind of imaging the pair is intended to achieve. Single sub, a port can get 'more' but I find it's risky, you can get 'more' mud.

Thanks for everybody's replies I appreciate it.  First let me say that when I hook up my Cambridge audio axr 85 amp to my speakers there is plenty of bass I'm not a base head so I'm not looking to get crazy amounts of Base but when I hook up my Cambridge to those speakers there is enough I'm satisfied with the bass I just don't like the rest of the sound signature.

I'm not sure if my speakers because why am I getting good bass out of a different amp but when I hook it up to my IO amp I'm not getting as good a base I think it's the amp and I know I'm not going to get really great bass out of a 5 inch woofer.

Those wharfedale diamond 225s I've always wanted those and I heard that those pair very well with my rega IO.  It does have a bigger woofer in The wharf tales and it's not that much bigger of a speaker than mine dimension Wise it's not a whole lot bigger it's a half inch wider 2 in taller I've read a lot of stuff around the internet and on these forums about the wharf deals with my amp 

But I do like to sound signature with my speakers there's just not enough face so I'll probably just add a subwoofer I don't want to sell my speakers get the wharf tales I don't like them.  I'm definitely going to check into your guys recommendations for subwoofers wasn't planning on having to buy one so I really don't have much of a budget for one.

My room is 10 ft x 12 ft so it's not very big and my speakers sit on my desk they're about 5 ft apart I got them on stands so it's not an absolute ideal situation where I can pull them out into the room and put them on floor sanders and probably get how much improve sound with my current room I just don't I can't pull it off they have to go on the desktop.  I will say though they do sound good on the desktop the image well they sound good I got them towed slightly in I'm just missing the low end punch.

I wouldn’t put too much stock in wharf tales if I were you. Fishermen always brag about the one that got away.

Well its kinda a know fact the Wharfdales 225 pair well with Rega IO, at least everywhere i read.

Im going the sub route.

Problem is my small budget of $250.  I want a small footprint also, im guessing 10 inch sub is plenty for my size room.  Looking for suggestion on brands and models in my price range, probally not alot of options, i just dont have anymore budget to go higher.