Russound 2.2 AB is also a shelf mount unit like the Niles. The Russound is rated at 150wpc however. There is also a wall mount unit (1.2)
10 yr. warranty
14 AWG spkr jacks
79.00
Niles rated for 100wpc
86.00
those are the only two I've found.
I'd be curious to see if any load is applied to the unused amp.... and/or if either or both amps can be left on when not under load/use.
The power capacity of the Niles concerns me... and the speaker taps of the Russound bug me.