2. misc-audio
  3. 180626-167203

Isolated ground in dedicated room/new construction?

Am building a custom house from the ground up with a dedicated listening room. Room will have have 3 dedicated 20 amp home runs for the system using 10 gauge 10/2 romex with ground, terminating with PS audio IG 120v outlets. Romex NM wire with plastic boxes, no metal boxes or conduit. House will have 400 amp service utilizing two 200 amp panels. With this set up is there any point in setting up an isolated ground and how do I go about it? Is it even feasible?

frym

Showing 3 responses by harpo75

harpo75
121 posts
 

Would you please explain to me the reason for not using metal boxes?

I would have thought (just guessing) that a metal box that is grounded by the conduit would act as a shield around the outlets.  What is the reason for plastic boxes?  Thanks!

harpo75
121 posts
 

Immatthewj- That was/is a good little amp.  The bad thing was having to take the bottom off the amp to go in and bias it.  Never could figure out why Dennis did that. Hopefully you drilled a hole in the chassis and mounted the bias pot and mount a couple test point terminals on the outside also.  Makes it much easier.  Did that for several people.  Sweet sounding amp!

harpo75
121 posts
 

Immatthewj- Just for your reference then if you ever sell it that is the SLA-70B Signature version 2. If you add high quality coupling caps and a beefed up power supply (more electrolytic capacitance and big polypropylene bypass caps) it’s very good still. I have custom fully balanced SLAM-100 mono blocks with separate mono block power supplies running KT150’s. Very nice amplifiers.

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