On Thu, 16 Mar 2006 08:18:33 +0000, Glenn Richards
wrote:

Don Pearce wrote:

Glen,, please give it a rest. You aren't funny any more and this is
all becoming just a little boring.

And herein lies the problem with this group.

I ask a serious question, expecting some sensible responses, and instead
all I get are sarcastic comments.

No, you were trolling.

The theory is sound anyway, if sticking an LCR filter across the mains
input does indeed reduce the noise floor.
No it doesn't. Nobody who knows what they are talking about has ever
told you any such thing. Did you make this up, or read it in one of
the audio comics?

As reducing the noise floor
(by whatever means) improves dynamics. And this I have tested, I've
recently been involved in cleaning up some recordings made about 25
years ago on analogue equipment. This process involves re-EQ followed by
digital noise reduction, and the results before and after applying the
noise reduction are nothing short of dramatic.

Cleaning up recordings most certainly does *not* involve eq. That
would be changing recordings.

This is using Nero Wave Editor (that comes with Nero Burning ROM), so no
fancy expensive software.

My question was a serious one, as it's obvious to anyone with any
knowledge of audio that lowering the noise floor will improve the sound.

Read above - you can filter the mains til you turn blue and you won't
change your noise floor by even a milli dB.

So, I repeat. If you've got a lot of electrically noisy equipment on the
same ring main as the hi-fi (eg switching power supplies in PCs etc)
that's kicking out a lot of RF interference on the ring main, would it
not follow that eliminating (or at least greatly reducing) this noise,
and therefore providing a clean power feed to the amplifier and other
equipment, would lower the noise floor?

Turn your amplifier on, with no music playing and listen. Leave the
volume control in the normal listening position and sit in your
listening chair. What can you hear? Anything? Of course not. And what
little hiss there is comes from the front end of the amplifier. None
of it comes from the mains.

Once again, I'm not for a moment advocating spending £250 on something
from Russ Andrews. What I'm actually talking about is getting a standard
IEC lead for a couple of quid, then fitting a filtered 13A plug to it,
also for a couple of quid. At trade prices in single quantities this
will cost less than a fiver (which is actually less than you pay for a
standard IEC cable at places like PC World).

So, would someone like to provide a serious answer now?

Good old Russ Andrews - he has successfully conned £250 out of you.
Now wise up and stop waving your stupidity like a flag of honour.

d

Pearce Consulting
http://www.pearce.uk.com