Ground Loop?
I seem to have a ground issue with my phono preamp a Parasound JC3 Jr that just started about 3 months ago. I've tried very thing. A different Preamp (Moon 350p) replaced an Emotiva XMC-1 Different TT but still has the issue whether it's connected or not. I have 2 dedicated 20 Amp lines direct to fuse box and plugged them directly into the sockets bypassing my conditioner Audiance V8. It's a tapping sound with static but when I touch the loading pot in back it stops chattering but has a low-level hum. I have even sent it directly to Parasound and no issues were found. Going nuts!
@erik_squires the luxman amps i have seen pictures of all have the the class2 insignia. |
@invalid I'm not an expert in all things that need to be tested and approved, but based on my amateur reading of the requirement for a class 2 insignia, the device needs to be double insulated, and, again, from my eyeballs, it's no better insulated than any other power amplifier. Please see the middle picture where I show the bare fuse holders, with the AC cables to the right of them. That is what you would see immediately upon removing the bottom panel. To my poor unqualified eyes that is not a class 2 cabinet. Maybe some one else can help me understand how it is. |
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Funny thing is, I didn’t remember seeing that either. I own exactly that model. :) I’m not breaking my back to find out. :-) AFAIK, double insulated gear has a dual square logo and I haven’t seen that. I’d have questioned if it was even legitimate based on how the unit is constructed. Forgot to post the blog with the images I referenced, my bad: https://inatinear.blogspot.com/2023/04/luxman-507ux-empower-project.html There is a separate blog about how it seems the Luxman has the wrong leg fused here: https://inatinear.blogspot.com/2023/04/luxman-507ux-ac-inlet-mistake.html |
