Suspected power fluctuations on new 20A Circuit

I recently installed a new circuit (ran new romex to a new 20A breaker) in the existing 150A electrical panel in my house.  The devices that are currently using this circuit are:

Pro-ject debut carbon SB
Pro-ject tube box s
NAD T785
32" Samsung LED TV
24" HP LED Monitor
Roku

I purchased the NAD T785 overseas, therefore I need a transformer to accommodate the 220V requirement.  I'm using Seven Star AR-1000 voltage regulator. With all devices powered down (or in Standby mode), I can hear a clicking sound in the voltage regulator.  This is a sound that I've previously heard when lights flickered (before moving to new circuit).  I therefore suspect that something irregular is occurring or there is some sort of power fluctuation (this is where my understanding of electricity ends).  Is what I'm hearing doing the job by providing a regulated power to my equipment? Do I need something different?  Better?  Is there a tool that can be used to analyse precisely what is occurring?  If this is a new circuit, I also suspect what I'm experiencing is caused by my town's electrical cables.