KRK ST8s Buzz?

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Sorry, don't know why i'm unable to reply so I created a new thread
with the same Subject.

Well. This buzz sounds more like a subtle crackle/noise coming from
the center of the Woofers when playing relatively complex piano
chords...not so when playing single notes. Sine waves come clean
though.
Signal is absolutely clean.
Once other elements come into play it's almost imposible to hear the
problem.
Othe than that they sound pretty good, a bit shallow but i must get
used.

How do you recognize a faulty Woofer? is it something very obvious?
Does square waves damage the Woofers as well? My power amp feeds only
40W per channel, KRK recommends a bit more than that.

Thanx for your help.

Rocco.

 

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On 11 Jan 2005 18:33:22 -0800, floresrocco@gmail.com (rokko) wrote:

>How do you recognize a faulty Woofer? is it something very obvious?
>Does square waves damage the Woofers as well? My power amp feeds only
>40W per channel, KRK recommends a bit more than that.

Might want to see if you can rent a slightly higher power amp, then.
Underpowering your monitors can be damaging to them, and may be
resulting in the noise you describe as you starve the coil.

jtougas

listen- there's a hell of a good universe next door
let's go

e.e. cummings

 

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rokko <floresrocco@gmail.com> wrote:
>
>Well. This buzz sounds more like a subtle crackle/noise coming from
>the center of the Woofers when playing relatively complex piano
>chords...not so when playing single notes. Sine waves come clean
>though.
>Signal is absolutely clean.

That's not a buzz. That's not noise. That's distortion of some kind.

>Once other elements come into play it's almost imposible to hear the
>problem.
>Othe than that they sound pretty good, a bit shallow but i must get
>used.
>
>How do you recognize a faulty Woofer? is it something very obvious?

That sound could be a faulty woofer, but it could also be a microphone
problem, a preamp problem, or even a room problem.

>Does square waves damage the Woofers as well? My power amp feeds only
>40W per channel, KRK recommends a bit more than that.

It might be an amp problem as well, then.

Speakers cannot reproduce square waves very well, because they cannot
teleport the cones from place to place without them being in intermediate
positions. Drivers in general get very unhappy when they try to move
very fast.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

 

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Scott Dorsey wrote:


> Speakers cannot reproduce square waves very well, because they cannot
> teleport the cones from place to place without them being in intermediate
> positions.


That doesn't work, either. They have to teleport the air that's between
the two positions as well. But then the air in its new position gets
intermingled with the air that was there already, and has to decompress
instantaneously. Better, because there's less mass to move, but still
no square.

 

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In article <c38fbac.0501111833.6e1294d3@posting.google.com> floresrocco@gmail.com writes:

> Well. This buzz sounds more like a subtle crackle/noise coming from
> the center of the Woofers when playing relatively complex piano
> chords...not so when playing single notes. Sine waves come clean
> though.
> Signal is absolutely clean.

Thanks for the wild goose chase. As part of the requirements for
posting on rec.audio.pro, there should be a listening test.

Identify the following:

Buzz
Hum
Hiss like a snake
Distortion
Diginoise
Funny sounding
Out of phase
Phase shift (on a mono signal)
3 dB peak at 4 kHz
Warm
Digital
Analog

> How do you recognize a faulty Woofer? is it something very obvious?

When certain notes tend to sound buzzy and others don't. But you have
to isolate the speaker from the room and anything around it that can
rattle. Take it outdoors. Find a program that will generate a sweep
tone and make a CD of it. Listen to that sweep through the speaker and
if you hear something like your "buzz" at any frequency, the woofer
may be blown.

> Does square waves damage the Woofers as well? My power amp feeds only
> 40W per channel, KRK recommends a bit more than that.

It can. Depends on what frequency, and for how long. Or it could
simply be defective.


--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo