In any speaker, when you put the volume up high, there is more
electric buzzing.

1) What is this buzzing called?
2) What specifications in a speaker reduce the amount of buzzing as
volume is turned up? e.g. low/high impedance, sensitivity, etc.

wrote in message
...
In any speaker, when you put the volume up high, there is more
electric buzzing.

1) What is this buzzing called?

If it's a "buzzing" sound, it's usually called "buzz". If it's more of a
"humming" sound then it's called "hum".

2) What specifications in a speaker reduce the amount of buzzing as
volume is turned up? e.g. low/high impedance, sensitivity, etc.

None at all, because it's not caused by the speaker. It's caused by pick-up
of mains-borne interference earlier in the system, ie. the amplifier, it's
wiring, or the source components, CD player, tuner etc.

David.

"David Looser" wrote in message
...
wrote in message
...
In any speaker, when you put the volume up high, there is more
electric buzzing.

1) What is this buzzing called?

If it's a "buzzing" sound, it's usually called "buzz". If it's more of
a "humming" sound then it's called "hum".

2) What specifications in a speaker reduce the amount of buzzing as
volume is turned up? e.g. low/high impedance, sensitivity, etc.

None at all, because it's not caused by the speaker. It's caused by
pick-up of mains-borne interference earlier in the system, ie. the
amplifier, it's wiring, or the source components, CD player, tuner
etc.

David.






.... or more often than not poor design and/or cost cutting/inadequacy in
the power supplies. Much of it is due to poor mechanical layout within
the amp case.

I had a power MOSFET amp that I built myself - actually as dual mono -
with fully regulated power supplies capable of 110Wpc into transmission
line loudspeakers that could rattle windows with ease so good was their
low frequency response. Put you ear right up to the speaker and all you
could hear was a little hiss but no hum.


--
Woody

harrogate three at ntlworld dot com

"Woody" wrote in message

"David Looser" wrote in
message ...
wrote in message
...
In any speaker, when you put the volume up high, there
is more electric buzzing.

1) What is this buzzing called?

If it's a "buzzing" sound, it's usually called "buzz".
If it's more of a "humming" sound then it's called "hum".

2) What specifications in a speaker reduce the amount
of buzzing as volume is turned up? e.g. low/high
impedance, sensitivity, etc.

None at all, because it's not caused by the speaker.
It's caused by pick-up of mains-borne interference
earlier in the system, i.e.. the amplifier, it's wiring,
or the source components, CD player, tuner etc.

... or more often than not poor design and/or cost
cutting/inadequacy in the power supplies. Much of it is
due to poor mechanical layout within the amp case.

I've bench tested 100s of components and find that most amps, tuners,
optical disc players, etc, are usually audibly and measurably relatively hum
free.

I'm talking about equipment that is mid-fi or better.

Most of the hums and buzzing is due to:

(1) Cheap equipment, such as boom boxes and rack systems that are little
better.

(2) Broken equipment - some of which is decades-old.

(3) System problems, such as corroded connections, equipment located above
the power transformer of another piece, etc. In some systems there are
problems with gain-staging due to multiple pieces with volume controls, and
incorrect setting of those controls.

I had a power MOSFET amp that I built myself - actually
as dual mono - with fully regulated power supplies
capable of 110Wpc into transmission line loudspeakers
that could rattle windows with ease so good was their low
frequency response. Put you ear right up to the speaker
and all you could hear was a little hiss but no hum.

That's all fine and good. IME, most commercial equipment of even modest
quality is just about as good. It's not unusual for amplifier input stages
to have regulated power supplies. A properly-designed output stage will have
low hum if provided with a reasonably well-filtered unregulated power
supply.

David Looser wrote:

wrote in message
In any speaker, when you put the volume up high, there is more
electric buzzing.

1) What is this buzzing called?

If it's a "buzzing" sound, it's usually called "buzz". If it's more of a
"humming" sound then it's called "hum".

2) What specifications in a speaker reduce the amount of buzzing as
volume is turned up? e.g. low/high impedance, sensitivity, etc.

None at all, because it's not caused by the speaker. It's caused by pick-up
of mains-borne interference earlier in the system, ie. the amplifier, it's
wiring, or the source components, CD player, tuner etc.

Other possibilities might be responances or coil-rub.

Graham

wrote:

In any speaker, when you put the volume up high, there is more
electric buzzing.

It could be 101 things.

Can you make a recording of it at different volumes and post it
somewhere convenient ?

Then we may be able to help more.

Graham