The SP3 speaker cables came in the other day. Didn't notice an immediate change/improvement, but still burning them in. The MA3 interconnects came in today, and I DID notice an immediate improvement with them. They're not even broken in yet, they're brand new! Not sure if that speaks to the quality of the cables I upgraded from (SKW speaker cables, but generic XLR interconnects), the fact that interconnect cable quality has more of an effect on the overall sound signature, or perhaps some combination of both. Extremely satisfied now with choosing Morrow cables. In fact, so much so, that I just put in an order using my thank you coupon for a pair of single-ended interconnects to replace the SKW cables connecting my subwoofer to my preamp.
-Ed