Haha...funny story here.
I used to have Z560s and so did a buddy of mine. His rear right channel stopped working and since his speakers were still unter warranty he called Logitech. Logitech said "The Z560s have been discontinued, We'll have to replace them with the X530s (MUCH better). We don't need you to send your old ones back in, just take off the serial number stickers and throw them away."
I think you can guess what I did. Called logitech and got a free pair of X530s and kept my perfectly working X560s. FREE!
<3 Logitech tech support.
'92 Mustang GT - GT40P Heads - Trick Flow Stage 1 cam - GT40 Intake - BBK Unequal shorty headers - FRPP 3.73 gears - Mickey Thompson ET street drag radials - 13.89 @ 99.09 and spinning like hell off the line