I use MA-4 balanced interconnects and SP-5 bi-wire speaker cables in my system and couldn't be happier. There has been much discussion about the quality of power based on the time of day you listen to your system. I'm wondering if your problem has more to do with variations in power quality vs. the interconnects. Since you only use MA-1's, what type of power cable are you using?
morrow ma1 interconnect
This is a review of this low budget interconnect. The Morrow MA1 is one of the worst peace of junk i ever heard! Sorry to say it but it’s the truth. And, all that about the burn in process is nonesense. I believe in burn-in, but these cables don’t. I sit down to listen to them after 120 hours and they sounded terribly thin, lightweight and bright. These cables do not have any body at all in the vocals and no weight in the low frequencies. Even the highs sounded very thin. They did not change much after 600 hours!!!! All that compared to my budget interconnect king Atlas Equator MKII. I returned them for a full refund. Very annoying sound and a big disappointment.