A2DP with SBC may actually be lower quality than the analog jacks on the iPod.

Oh, if you were planning to use a Bluetooth adapter, it would also be more than likely by connecting by analog. Then you've got two problems.
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Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris