[Julien Bernier]

Hey, (First, excuse my English)
I bought my KRK RP-6 about three months ago, and suddenly one of my 2
monitors started to rattle as hell on some frequencies. If I put a
slight pressure on the woofer, the rattle is less audible. I think it
could be a very small hole in the woofer's sealing or something, what
do you think?
Julien

[Mike Rivers]

Julien Bernier wrote:

I bought my KRK RP-6 about three months ago, and suddenly one of my 2
monitors started to rattle as hell on some frequencies. If I put a
slight pressure on the woofer, the rattle is less audible.

I think your woofer is blown - the voice coil winding has come loose
from the form. Or it could be distortion in the amplifier. Seeing as
how this is a powered monitor, there's little chance that you overdrove
it to the point of damaging it, so you should have pretty good luck
getting it repaired under the warranty.

[Julien Bernier]

Mike Rivers wrote:
Julien Bernier wrote:

I bought my KRK RP-6 about three months ago, and suddenly one of my 2
monitors started to rattle as hell on some frequencies. If I put a
slight pressure on the woofer, the rattle is less audible.

I think your woofer is blown - the voice coil winding has come loose
from the form. Or it could be distortion in the amplifier. Seeing as
how this is a powered monitor, there's little chance that you overdrove
it to the point of damaging it, so you should have pretty good luck
getting it repaired under the warranty.

In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...

Well... **** happens, rrrrrright?

[Meindert Sprang]

"Julien Bernier" wrote in message
ps.com...
In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...

That figure is meaningless. I can set a 1kW amp to -30 dB and still blow a
0.5W speaker.......
dB's always represent a ratio, not an absolute level.

Meindert

[Julien Bernier]

Meindert Sprang wrote:
"Julien Bernier" wrote in message
ps.com...
In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...

That figure is meaningless. I can set a 1kW amp to -30 dB and still blow a
0.5W speaker.......
dB's always represent a ratio, not an absolute level.

Meindert

Yeah but I don't have a 1kW amp...

[Meindert Sprang]

"Julien Bernier" wrote in message
ups.com...

Meindert Sprang wrote:
"Julien Bernier" wrote in message
ps.com...
In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...

That figure is meaningless. I can set a 1kW amp to -30 dB and still blow
a
0.5W speaker.......
dB's always represent a ratio, not an absolute level.

Meindert

Yeah but I don't have a 1kW amp...

Yeah but you did not tell us that. So if you say the max. power of the amp
is below the rating of the speakers, then it is indeed unlikely that you
blew them.

Meindert

[Mike Rivers]

Julien Bernier wrote:

In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...
Well... **** happens, rrrrrright?

Right. What were you doing when the rattle started? Were you playing
music thorough them? Carrying them out in the rain? Nothing, you just
turned it on one day and there was the rattle?

Really, it makes no difference. But you should just check to make sure
that whatever is feeding the speaker isn't causing distortion that
you're describing as "ralttle." If the other one of the pair sounds OK,
move the plug that's going to that speaker over to the one that
rattles. If it still rattles, then it's broken. If it doesn't, you have
some troubleshooting to do.

If KRK believes in their protection technlology (or the glue holding
the speaker or the cabinet together), they should deal with this
gracefully. See your dealer. I'm sure the warranty extends for longer
than three months.

[Arny Krueger]

"Julien Bernier" wrote in message
oups.com
Hey, (First, excuse my English)
I bought my KRK RP-6 about three months ago, and suddenly
one of my 2 monitors started to rattle as hell on some
frequencies. If I put a slight pressure on the woofer,
the rattle is less audible. I think it could be a very
small hole in the woofer's sealing or something, what do
you think?

Most likely, a rubbing voice coil.

Most likely causes, thermal stress or excess mechanical shock.

[Don Pearce]

On Tue, 12 Dec 2006 11:39:17 -0500, "Arny Krueger"
wrote:

"Julien Bernier" wrote in message
roups.com
Hey, (First, excuse my English)
I bought my KRK RP-6 about three months ago, and suddenly
one of my 2 monitors started to rattle as hell on some
frequencies. If I put a slight pressure on the woofer,
the rattle is less audible. I think it could be a very
small hole in the woofer's sealing or something, what do
you think?

Most likely, a rubbing voice coil.

Most likely ca
uses, thermal stress or excess mechanical shock.

Very probably. First move - stand the speaker upside down for a few
hours. Does the rattle vanish? If so, the magnet assembly has dropped
slight;y. If you can use the speaker this way, carry on, otherwise
take the woofer out and turn it 180 degrees.

You still have a bad woofer, and it will happen again eventually, but
this will keep you going until you can replace it.

d

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

[The Spanish Inquisition]

Meindert Sprang wrote:
"Julien Bernier" wrote in message
ups.com...
Meindert Sprang wrote:
"Julien Bernier" wrote in message
ps.com...
In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...
That figure is meaningless. I can set a 1kW amp to -30 dB and still blow
a
0.5W speaker.......
dB's always represent a ratio, not an absolute level.

Meindert
Yeah but I don't have a 1kW amp...

Yeah but you did not tell us that. So if you say the max. power of the amp
is below the rating of the speakers, then it is indeed unlikely that you
blew them.

They're active monitors, they have the (100 Watts) amps built in. It
seems unlikely that the manufacturer would build the wrong amp in.

http://www.krksys.com/v3/rokit_rp6.asp

Ximinez
--
Our three weapons are fear, surprise, and ruthless efficiency...
and an almost fanatical devotion to the Pope....
http://www.ai.mit.edu/people/paulfitz/spanish/t1.html
http://www.youtube.com/watch?v=gldlyTjXk9A

[Julien Bernier]

Mike Rivers wrote:
Julien Bernier wrote:

In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...
Well... **** happens, rrrrrright?

Right. What were you doing when the rattle started? Were you playing
music thorough them? Carrying them out in the rain? Nothing, you just
turned it on one day and there was the rattle?

Really, it makes no difference. But you should just check to make sure
that whatever is feeding the speaker isn't causing distortion that
you're describing as "ralttle." If the other one of the pair sounds OK,
move the plug that's going to that speaker over to the one that
rattles. If it still rattles, then it's broken. If it doesn't, you have
some troubleshooting to do.

If KRK believes in their protection technlology (or the glue holding
the speaker or the cabinet together), they should deal with this
gracefully. See your dealer. I'm sure the warranty extends for longer
than three months.

I didn't do ANYTHING before it started. Maybe it has done this for more
than a day, maybe a week, but as I said it's only at some frequencies.

About the rain, I though this was waterproof... *g

Indeed, only one speaker does that "distortion". It's a kind of bzzzz
on some notes. I'm going to try to switch cables like you said. but it
sounds as a mechanical problem.

In fact I don't know about that company. I bought these monitors
because here everyone seemed to agree they were good for their price. I
took a listen and bought them at www.audiomidi.com . I emailed KRK
yesterday, and I still don't have a reply. (I don't want to give em a
call because of long-distance call fees). If I don't receive any
replies as of tomorrow, I'll try to deal with audiomidi directly.

Thanks for your help!

[Take Vos]

Hello Julien,

I bought my KRK RP-6 about three months ago, and suddenly one of my 2
monitors started to rattle as hell on some frequencies. If I put a
slight pressure on the woofer, the rattle is less audible. I think it
could be a very small hole in the woofer's sealing or something, what
do you think?
Although not a KRK, I had a lowther speaker that started the rattle.
There was dirt in the air gap, between the magnet and its casing. So
the coil was rubbing against it.

A speaker specialist disassembled it, removed the dirt with
masking-tape. Then he reassembled and realigned it. No more rattle.

I guess the factory can do the same for your speaker.

Cheers,
Take

[jakdedert]

Julien Bernier wrote:
Mike Rivers wrote:
Julien Bernier wrote:

In fact I never pushed them near 0db. Always at -30, so I don't
understand how it could have been damaged...
Well... **** happens, rrrrrright?
Right. What were you doing when the rattle started? Were you playing
music thorough them? Carrying them out in the rain? Nothing, you just
turned it on one day and there was the rattle?

Really, it makes no difference. But you should just check to make sure
that whatever is feeding the speaker isn't causing distortion that
you're describing as "ralttle." If the other one of the pair sounds OK,
move the plug that's going to that speaker over to the one that
rattles. If it still rattles, then it's broken. If it doesn't, you have
some troubleshooting to do.

If KRK believes in their protection technlology (or the glue holding
the speaker or the cabinet together), they should deal with this
gracefully. See your dealer. I'm sure the warranty extends for longer
than three months.

I didn't do ANYTHING before it started. Maybe it has done this for more
than a day, maybe a week, but as I said it's only at some frequencies.

About the rain, I though this was waterproof... *g

Indeed, only one speaker does that "distortion". It's a kind of bzzzz
on some notes. I'm going to try to switch cables like you said. but it
sounds as a mechanical problem.

In fact I don't know about that company. I bought these monitors
because here everyone seemed to agree they were good for their price. I
took a listen and bought them at www.audiomidi.com . I emailed KRK
yesterday, and I still don't have a reply. (I don't want to give em a
call because of long-distance call fees). If I don't receive any
replies as of tomorrow, I'll try to deal with audiomidi directly.

Thanks for your help!


In case nobody else has mentioned it (I haven't followed this thread
closely), check for voice coil problems: 1) Turn off speaker. 2) Remove
grill 3) VERY gently position your fingers evenly around the center
dust cap on the woofer. 4) Again, GENTLY push the speaker cone in and
let it spring back while listening for any sound and feeling for any
contact.

There should be none. The cone should move freely in and out with no
resistance except for the natural springiness of the suspension. If you
hear anything, there's something wrong with the voice coil. Either the
magnet has shifted, the voice coil warped because of heat or mechanical
issues, or somehow (no idea how) something has gotten into the gap
between vc and magnet poles.

If you've any doubt, try it on the good speaker for reference.

jak

[Julien Bernier]

I tried very gently, but it wouldn't work, so I pushed the harder I
could and BLAM! My woofer is now hanging loose!!! Yipee!!! g

Thanks for the tip, I'll try it later. Before I do anything I'll wait
for KRK's answer. I won't do anything that could void the warranty.

P.s.: I was joking about the loose thang...

[Scott Dorsey]

Julien Bernier wrote:
Hey, (First, excuse my English)
I bought my KRK RP-6 about three months ago, and suddenly one of my 2
monitors started to rattle as hell on some frequencies. If I put a
slight pressure on the woofer, the rattle is less audible. I think it
could be a very small hole in the woofer's sealing or something, what
do you think?

I think you should take it back. It should still be under warranty,
right?

The most common way to cause this is for the voice coil to become
disconnected from the cone. This can sometimes be fixed, but really
you want them to replace it because you paid money for something that
works and you did not get it.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Julien Bernier]

Hahaha, best answer from a retailer ever. Look at this:

--------------

Hello,
I would open it up and see if there is anything physically loose or
moving around in there that should not be. If there isn't then it is
probably the woofer.

Best Regards,
Please include all previous correspondence with any further replies

Tony Cora
Technical Support/ Customer Service
KRK Systems, LLC


---------------

I tried to shake it GENTLY and I heard something inside moving. Should
I try opening it? Is it user friendly or am I better off asking for a
new one?

[Mike Rivers]

Julien Bernier wrote:
Hahaha, best answer from a retailer ever. Look at this:
"I would open it up and see if there is anything physically loose or
moving around in there that should not be. If there isn't then it is
probably the woofer."

Well, at least you got a reasonably prompt response. That's better than
a lot of these companies.

I tried to shake it GENTLY and I heard something inside moving. Should
I try opening it? Is it user friendly or am I better off asking for a
new one?

How difficult does it look to open it? If you can see screws around the
edge of the front of the woofer, take them out and you'll be able to
remove the whole speaker. Or perhaps the plate on the back that
contains the amplifier is obvious to remove. It's worth a look, but
don't use anything more powerful than a screwdriver, and don't use the
screwdriver for anything but removing screws. g

If you can really hear something loose inside, it might be a cabinet
brace that came unglued.

[jakdedert]

Julien Bernier wrote:
Hahaha, best answer from a retailer ever. Look at this:

--------------

Hello,
I would open it up and see if there is anything physically loose or
moving around in there that should not be. If there isn't then it is
probably the woofer.

Best Regards,
Please include all previous correspondence with any further replies

Tony Cora
Technical Support/ Customer Service
KRK Systems, LLC


---------------

I tried to shake it GENTLY and I heard something inside moving. Should
I try opening it? Is it user friendly or am I better off asking for a
new one?


Is this thing under warranty? In that case, I'd have been down to the
dealer post-haste before even bothering to post here.

jak

[Julien Bernier]

jakdedert wrote:
Julien Bernier wrote:
Hahaha, best answer from a retailer ever. Look at this:

--------------

Hello,
I would open it up and see if there is anything physically loose or
moving around in there that should not be. If there isn't then it is
probably the woofer.

Best Regards,
Please include all previous correspondence with any further replies

Tony Cora
Technical Support/ Customer Service
KRK Systems, LLC


---------------

I tried to shake it GENTLY and I heard something inside moving. Should
I try opening it? Is it user friendly or am I better off asking for a
new one?


Is this thing under warranty? In that case, I'd have been down to the
dealer post-haste before even bothering to post here.


Yeah I'll try dealing with AudioMidi.com first, but I don't want to be
2-3 weeks without my monitor *sob
J