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I had the Silver Tellus and Posidon.
I connected the Ground Master to the a Rod which goes down 20 meters into the ground. I had someone come in to drill very deep. Here in Indonesia we use Ground Water which is filtered so another part of the garden was used just for grounding rods.
Puritan just worked allot more better for me in my room.
i think 1 meter is too short, you should prob be doing atleast 2-3 meters deep but this is a guess.
I am told by another electrical engineer the deeper the better but Puritan claims 1 meter should work fine. Iv never tried 1 meter but if it works fine it can save the hassle and cost of using longer copper Rods and the cost/expense of drilling.
I have two Groundmaster City units. One, for signal grounding, is connected to unused rca plugs on my Pathos TT RR integrated, and Modwright Marantz SA8005 sacd player. It replaced a Gutwire Perfect Ground cable on the Pathos amp, which provided a subtle reduction in noise/increase in articulation and musicality. I tried to use a 2nd Gutwire grounding cable on the sacd player but it must have created a ground loop because I gut hum. Just comparing the Groundmaster City with the Gutwire cable on the amp, the Groundmaster unit is about 40% better. And connecting a Groundmaster City to both amp and player at the same time created no hum or other issues, and surprised me with the resulting improvement in sound quality. My system had no obvious noise or electronic artifacts to begin with, but with source and amp connected to the Groundmaster city the sound was noticeably more relaxed, natural, and articulate. My 2nd Groundmaster City is for chassis grounding. It will be connected to casework screws on my Bybee Stealth Power Purifier and Modwright PS 9.0 power supply, once I receive the cables I ordered for this purpose.
A couple months ago I inserted the GroundMaster CITY into my main system and would like to share my thoughts. I have a PSM156 so this was an inexpensive and easy upgrade. I wasn’t expecting much but boy was I surprised! It’s very easy to test - just unplug the cable from the port on the PSM156 and listen. What I (and my wife who could care less about it) noticed, was an immediate bump in clarity. The music got slightly louder with increased clarity, tighter bass and better space. At $250 this is probably the best bang for the dollar upgrade I have ever made. Considering I have a dedicated circuit, quality PCs and a PSM156, it was hard to believe that there was still that much noise on my lines.
I was so impressed I immediately ordered the GroundMaster CITY and RouteMaster to ground my signal-based components. I plugged the RouteMaster cables into my DAC, pre and amp. The result? Nothing. I could not hear any discernible difference. I tried the RouteMaster with and without the PSM156 connected to the GroundMaster CITY. There may have been a very slight uptick in SQ when the PSM156 was disconnected from the GroundMaster CITY but it wasn’t consistent.
Maybe I need a more resolving system for the GroundMaster CITY/RouteMaster combo to make a difference? Or maybe draining the noise from the mains filter takes care of 95% of the problem? There probably isn’t a lot of noise being generated by quality electronics downstream of the mains filter. However, if you don’t have a PSM156 with a convenient port to ground the chassis, maybe the GroundMaster CITY/RouteMaster combo is the next best thing?
I currently have the GroundMaster CITY/RouteMaster combo on my second system but it does not have enough resolution to show a difference. I will probably be selling the GroundMaster CITY/RouteMaster combo but will keep the GroundMaster CITY connected to my PSM156 forever. As a matter of fact if I were to order a PSM156/136 in the future I would just add the GroundMaster CITY to the order up front.