Hi I have recently bought a pair of Mackie 4cr monitor speakers and would like to add a sub woofer. To be honest i m not sure how to do this with the tascam dp 24sd ,I was hoping someone else might know. I think the Mackie s are very good but lack a bit of bottom end punch. Thanks in advance. Tyros. This sort of thing has cropped up before, and it has always been due to human error.