I refuse to own logitech or any of the other brands. My ultras are starting to hiss/whine now and I would rather have them fixed and upgraded and use them for years to come than replace it with something I find inferior. Who does the repairs/upgrades to the 5.1 ultras? I don't know if it's my amp or control box but from what I read it sounds like the amp. Please get back with me with prices and services if anyone knows someone reliable.Or hell even a way to bypass this amp all together and use a reciever to power the sub and sats. Either way is fine with me.