[quote name='Dingus' timestamp='1374513800' post='2149588']
It doesn't need to be a B&W sub , Ray , lots of other brands are perfectly compatible with your excellent 601's , which you should get up on some stands , if it all possible . I would recommend a REL sub, , but Velodyne and EPOS make some good ones too , if they crop up on EBay . I use a REL sub with some AE floorstanders and it sounds wicked . Deep and tight bass with a minimum of fuss .
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Oops ! I forgot to tell you that the speakers are already on stands. Just that they're called 'bookshelf speakers'. Me bad .
Great advice tho'