2. cables
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Dedicated mains supply unexpected result

I have a dedicated consumer unit supplying my Hifi as I know a lot of audio enthusiasts have. It was installed a couple of years ago and has rendered excellent sound quality.

l recently had my house electrics checked out and the electrician said I should install a heavier cable from the house mains inlet. It was rated at 70 amps and it should be 25mm sq, 100 amps. The copper cable in both cases is the standard UK domestic quality.

The replacement work has been carried out, however the sound quality has deteriorated, less powerful bass and a shrillness added to higher frequencies. Neither of these issues existed with the original supply cable. Nothing else has been changed in the system.

Anyone experienced this phenomenon?

dctom
jlbkmb1958
27 posts
 

If we are talking about a tube amp, check/reset the bias. 

dctom OP
108 posts
 

Thank you for the responses, I have not replied untill now  so I had a chance to carry out some of the suggestions from posts to the thread (some of which seem to have disappeared?) and get the electrican back.

Anyway cleaned all the connections with contact cleaner, checked tightness of connections and the electrician checked continuity and impedence. Also the dedicated circuit is  now directly connected to the incoming mains supply. Ran the system for a couple of days and things did improve.

As a final possible improvement I replaced the house main fuse (the end caps were quite tarnished) and cleaned the fuse container/contacts. This seems to have brought about a noticable improvement over the original sound quality.

I don’t think it is my imagineation but some often played tracks have greater clarity and tighter bass.

audphile1's avatar
audphile1
4,818 posts
 

Good to hear! It took my system couple of weeks to settle after the dedicated circuit was run. Cable break in and ears/brain getting used to new sound.

dctom OP
108 posts
 

👍thanks

hilroy48
126 posts
 

It is not your imagination. My system sounded bolder and more pronounced, after I ran a dedicated 20 amp CCT

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