PRE-PROs are much mor elike computers than any other component in your system. Sometime they need to be reset when something unexpected happens. I have had mine turned off and on again via my power conditioner with no ill effects. I think the power conditioner is fast enough on the draw that it avoids the 886 from experiencing a low voltage condition where it only really halfway shuts down. The H-15 shuts it down all the way as if it were turned off.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner