On Mon, 11 Sep 2006 17:30:51 +0200, Arnold wrote:

Don Pearce wrote:
What in blue blazes are you on about? Amplifiers don't burn in - they
start as good as they get, then very, very slowly fail, and if you
really want to play something on it for ages, play anything and just
press the repeat button.

I am considering always leaving the amp on. That way it is always warm
to play straight away and none of that terrible thermal cycling - being
switched on and off. I will get a decent lightning protector for those
nasty lightning bolts!

Thermal cycling is simply not an issue. I have amps that are many,
many years old, and they have never failed through thermal cycling. Do
global warming a favour, and turn off everything you aren't using.

As for trouble from lightning bolts, if you join the end of the
lightning conductor on your house to ground instead of the Hi Fi, you
will have no trouble.


You can't do anything with speakers using tones - all you will assess
is the depth of standing wave modes in you room. And believe me, if
you don't live in a really good anechoic chamber, they will be huge.

I just want to hear how balanced the tweeters are.

Not the slightest chance of doing it that way. Why do you suspect they
may be unbalanced? Play something in mono, something with plenty of
top end to it, and position the speakers equidistant from you, with
the tweeters facing you. Does the sound appear to come from a point
midway between the speakers? Yes? They are balanced. If not, nudge the
balance control slightly to put the image in the middle, then leave it
there. You won't need to do this, though - they will be just fine.

d

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

Don Pearce wrote:

I just want to hear how balanced the tweeters are.


Not the slightest chance of doing it that way. Why do you suspect they
may be unbalanced? Play something in mono, something with plenty of
top end to it, and position the speakers equidistant from you, with
the tweeters facing you. Does the sound appear to come from a point
midway between the speakers? Yes? They are balanced. If not, nudge the
balance control slightly to put the image in the middle, then leave it
there. You won't need to do this, though - they will be just fine.

I think this one pair of speakers of mine had a tweeter fried long ago
and I want to check if I can hear a difference between the original one
in the one speaker and the replacement in the other.

Don Pearce wrote:

As for trouble from lightning bolts, if you join the end of the
lightning conductor on your house to ground instead of the Hi Fi, you
will have no trouble.

Where I stay, lightning storms destroy fax machines, TV's, hifi
components, microwaves - you name it!

On Mon, 11 Sep 2006 18:36:01 +0200, Arnold wrote:

Don Pearce wrote:

As for trouble from lightning bolts, if you join the end of the
lightning conductor on your house to ground instead of the Hi Fi, you
will have no trouble.

Where I stay, lightning storms destroy fax machines, TV's, hifi
components, microwaves - you name it!

I don't wan t to live where you live. Where is it?

d

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

On Mon, 11 Sep 2006 18:34:03 +0200, Arnold wrote:

Don Pearce wrote:

I just want to hear how balanced the tweeters are.


Not the slightest chance of doing it that way. Why do you suspect they
may be unbalanced? Play something in mono, something with plenty of
top end to it, and position the speakers equidistant from you, with
the tweeters facing you. Does the sound appear to come from a point
midway between the speakers? Yes? They are balanced. If not, nudge the
balance control slightly to put the image in the middle, then leave it
there. You won't need to do this, though - they will be just fine.

I think this one pair of speakers of mine had a tweeter fried long ago
and I want to check if I can hear a difference between the original one
in the one speaker and the replacement in the other.

If they are the same make and model, don't worry about it. They don't
come in matched pairs.

d

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

"Arnold" wrote in message


I think this one pair of speakers of mine had a tweeter
fried long ago and I want to check if I can hear a
difference between the original one in the one speaker
and the replacement in the other.

Why not just use some regular music CD with good highs recorded on it that
you are familiar with?

"Don Pearce" wrote in message
...
On Mon, 11 Sep 2006 17:30:51 +0200, Arnold wrote:

Don Pearce wrote:
What in blue blazes are you on about? Amplifiers don't burn in - they
start as good as they get, then very, very slowly fail, and if you
really want to play something on it for ages, play anything and just
press the repeat button.

I am considering always leaving the amp on. That way it is always warm
to play straight away and none of that terrible thermal cycling - being
switched on and off. I will get a decent lightning protector for those
nasty lightning bolts!

Thermal cycling is simply not an issue. I have amps that are many,
many years old, and they have never failed through thermal cycling. Do
global warming a favour, and turn off everything you aren't using.


Yes....

"Arnold" wrote in message
...
Don Pearce wrote:

As for trouble from lightning bolts, if you join the end of the
lightning conductor on your house to ground instead of the Hi Fi, you
will have no trouble.

Where I stay, lightning storms destroy fax machines, TV's, hifi
components, microwaves - you name it!


And projector lamps, I suspect....

Arnold wrote:

I want to get hold of a free burn-in CD for my new amp. Does anyone
know of a public domain download that can be copied to CD and played?

What's wrong with any old CD you already have ?


I am also looking for a similar download file with tones of different
pitch but the same volume to compare left and right speakers.

Yes, I could buy something over the web from the Audiophile /
Stereophile website but I want it today still.

What precisely is it you're seeking to acheive ?

Graham

Don Pearce wrote:

This is going to be the last hot day of the year - get out and enjoy
it.

As if ! I was working on some EV SR speakers.

Graham