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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
Post removed 
gs5556
1,241 posts
 

From what you're describing the amplifier is not working correctly  after the mains cable was replaced from the meter to the panel. Call the electrician back and explain the amplifier is not working correctly and can he please check over his work. From what you describe, the voltage is sagging when the amplifier is being presented with a low impedance load call from the speaker.

I suspect he didn't torque down a connection lug at the panel or at the meter pan. If that is the case, it is a fire hazard and must be addressed immediately.

ozzy's avatar
ozzy
7,574 posts
 

I'm not totally sure I understand. But if the electrician installed a heavier gauge wire to your system, it may be a cable break in issue.

ozzy

stereo5's avatar
stereo5
6,515 posts
 

Did the electrician use copper or aluminum wiring for the new mains?

llg98ljk's avatar
llg98ljk
196 posts
 

Aluminum is for cans! Copper is for electrical wire and pennies.

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