Sorry Bill and MikeZ...but I gotta go along with DHurley.
There is no question in my mind that I got better sounding results when I used a Furman power conditioner.
Now that being said. The reason I started back using the Furman, was because at my regular all season long resort gig, I had a bad power source that was causing my Tone Match to shut down and other wise act goofy.
I had been working this same stage for two months, two gigs per week and had problems the whole time but didn't know it until it got so bad it caused temporary system (Bose) failure.
After connecting the power conditioner all my problems went away and everything sounded more clear, stronger and just plain better.
Now back to DHurley's comment and with respect to Bill and MikeZ. I have not used it at other locations because, in my opinion, it was not needed....now didn't we all just win this discussion?

BTW...I just made my last payment and now it's mine all mine!!..buwaaa ha ha I'm a happy camper with the best and best sounding PA in the world and it's steady makin' money now
Leo Dean.con