If I understand correctly, the Sedona is not a stereo amp (2 discrete inputs>2 separate power amps>2 separate speakers). It has a dual input to combine the two signals of the Taylor Expression System acoustic pickup/mic. If you ran stereo outputs from the SPACE reverb into the amp it would combine them. Run mono into SPACE input 1, mono out of SPACE output 1 into single amp input. The SPACE Hall Reverb sounds great in mono, albeit even better in true stereo.