My first venture into Morrow cables was close to 5 years ago. MA-4 Inteconnects with cu. Eichman's. They were a big step up from the cables I had at the time which were all 10 years old or older. I can tell you the MA-4's are a big jump in performance over the MA-1's. Since then I've found a cheaper interconnect that kills the MA-4 on all of my many components.
i use SP7's on the bass drivers of my Revel Ultima Studios and am happy with them. For a fraction of the cost, Cullen Speaker cables better the SP7's on mid's/ high's but the SP7's are superior on bass.
As dorkwad suggests the Morrow's are a good cable and will transfer the signal adequately, but there are better Cables for similar or less prices.
i could only recommend Morrow Cables when they are hugely discounted,at least 50% or more. The retail prices are a joke.
I think it's a smart business model, with the trade up program.