2. amps-preamps
  3. 1434034662

Luxman Class A Integrated Slight Buzzing Noise

Hello--

I just purchased my first class A amp--a Luxman 550ax--from an AG member recently. I noticed this morning that when I get close to the amp while it is turned on there is a slight buzzing noise coming from the unit. If looking directly at the top of the unit it seems to be coming from the right middle of the unit. Doesn't seem to affect anything with my Harbeth speakers and I only hear it from a couple feet away. I was wondering if this is normal for a class A amp. Anyone with a 550 or 590 have this issue? Any ideas what could be causing it? I have it plugged into a Richard Gray 400 Power Center using the stock Luxman two prong JPA1000 polarized power cord.

Sources are a PC connected USB to a Fostex HPA8C DAC connected to the Luxman with Transparent Audio Link 100 RCA cables.

Thanks,

Dave
ddinkel

Showing 1 response by ddinkel

ddinkel OP
5 posts
 
Thanks all for your input. bojack, you may be onto something with your suggestion of incoming power conditions. I haven't been able to fully investigate and haven't plugged the unit directly into the wall yet but it definitely seems worse when I play music in the early morning. I'll look into it more this week. Again, thanks all for your help.

Dave
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