update the sx980 is up and running thx to some cleaning,the sylvania works well and is in great shape. The concept 11.0 has a dead channel but the preamp is good,The first time I tested it I goofed and hooked the speakers on c while it was switched to A lol to many to test! Alot of this stuff I know nothing about. So far I really like the sx980 and the sx-1500T.The 1500 is cute with the pink and green lettering! It sounded great the first test but then next time I used it one channel sounded weak (no bass)