Testing for Dirty Electrical Power

This is a great question and it would help obviate a lot of needless purchases.

Also interested. I bought the same device and when I posted about it on Audiocircle I was informed that they are worthless but seems like an objective way to measure dirty power. My old house was a 19 but my new house w/ a dedicated line is around 70 IIRC. I plan to buy a PSM 156 at some point to see how that does...

Try your phono stage, at high  volume, without playing records. If you dont hear  noise  from your speakers, turning other equipment or power circuits on/off, from mobile phones, etc -  maybe, don't worry, its not a big problem.

Wish it was so simple. I have several of these types of "testers".

The hidden enemy rides along with the AC or DC current delivery in so many forms that these items cannot detect.

ozzy

Audiophiles start nit picking before the foundations are right. EMI/RFI testing is fine, but we don't hear up there, and bigger AC issues may be lurking.

Start with a simple meter like this one on the output of your conditioner.  Make sure the LED lights on top light up correctly, and if so then watch the voltage over time, including neutral voltage. 

How much does it drop when your stereo is on or plays?  Morning much better than evening?

This will help you gauge whether you need a dedicated line or voltage regulator as a front end.  Also make sure you don't have other issues!