New system with periodic sound dropouts

Within the last 2 months I've gotten new speakers (Monitor Audio Gold 300), pre-amp (Primare Pre32) and power amp (Primare A32).  Since setting it up, there are times when my DAC loses the signal and no music plays for 1 - 2 seconds.  Other times music plays flawlessly with no dropouts.  I just tested the outlet where my gear is plugged in and got voltage readings between 123.5 - 125.9 (but I only had one drop out and that was earlier in the day).  My subdivision is less than 5 years old and all of our utilities are underground.  I've been considering an AC conditioner or regenerator. Do I really need one?  If power isn't the problem does anyone have an idea as to why my DAC sometimes loses the music signal?