Assuming you are referring to some sort of voltage protection circuit, I would steer away from a UPS and look more towards lightning protection provided by many of the power conditioners out there. APC makes some good equipment and even has a UPS version. I have several APC H-15 protecting my equipment and they are perfect for a 990/7125 combo. Plenty of power available and very good protection.
_________________________
Model 990/7500/Magnepan 1.6 QRs/Large Advent Loudspeakers/Technics SL1200 MK2
Onkyo PR-SC886/7125/Klipsch RF-82 L/R,RC-62 center,RB-35 SR/SL, Aperion S-12 sub, Outlaw LFM1-EX
Harmony ONE
Blue Jeans and Monoprice interconnects
Samsung 6187
OPPO BDP-83
APC H15 Power Conditioner