2. misc-audio
  3. 185523-172314

Is it possible a 20 amp outlet can make a big difference in SQ?

This is a somewhat rhetorical question, but I'm interested if anyone has a similar experience, or can explain why...

I have one duplex outlet to power everything. I assumed it was 15 amp so a few months ago I replaced the outlet with a hospital grade 15 amp outlet. (fwiw there are 4 wires, 2 white 2 black). My tube amp is plugged directly into the wall.

On Friday the air-con went out so I had a reason to check the fuse box - and realized that the circuit powering my AV is 20 amp.

So I replaced the outlet with the same brand and grade but 20 amp. 

I was surprised that there was a significant change in SQ - I'd say dynamics are faster, more detailed, more powerful. 

If I'd spent $500 or more I'd factor in the mental bias but I spent $20 and expected nothing.

Am I imagining this?

Any thoughts? 

macg19
carlsbad2's avatar
carlsbad2
1,591 posts
 

You describe the improvements you get from rectifying an inadequate power problem.  You didn't change the power cord at the same time did you?  The most common cause of this problem is an inadequately sized (say 14-16 awg) power cord.

My guess is the 15 amp outlet was poorly installed or defective.

Never use the push holes in the back of an outlet, use the screws and bend a loop in the end of the wire.

Now for electrical safety discussion: How do you know the breaker is correct? Realize that the breaker is sized to protect the wires in the wall. for a 20 amp circuit, you need 12 awg wire. Hopefully that i what you have. If you have 14 awg wire, you should put a 15 amp breaker in. No need to change the outlet other than if it has the horizontal slot it could confuse someone, but not likely in your listening room.

 

Jerry

macg19 OP
882 posts
 

@carlsbad

No, I did not change the power cord at the same time.

I did not change any of the breaker switches - most are 20 amp.

Note I rent the house - I mention that to explain why I wasn’t super familiar with the breaker box.

Now that you mention it - it is possible the previous 15 amp outlet was improperly installed - this was in Dec - I was trying to do way too much after back surgery - so that could be it.

In any case, glad I found a reason to rectify the issue whatever it was...and for sure there is a lesson here:)

Thanks Jerry

Post removed 
More to discover