I have two inputs (E30 or CD/SACD Player) and two outputs (L30 or PA3 Amp). I use the JDS Labs OL Switcher. In your case, you can also use the OL Switcher for output switching only (i.e. L30 or integrated amp). Even if I don't need input switching, I prefer it this way than the other options mentioned in this thread (i.e. using the pre-amp out of L30 or Y splitter) for various reasons, but this is a more expensive option. Loss of sound quality should be minimal.