S600 buzzing BMR

I had this once or twice with my S600. I cleared it by checking the leveling of the speakers (it is prone to it more when not level) and gently poking the back suspension to clear the 'sticking' - it appears to be the suspension fouling on something that once centred again is ok. The buzzing is the fouling of the suspension that has partially locked hitting a resonance.

That was what mine was - leveling and poking made it go.

DB.

Hi DB,

Thanks for the info, i already tried poking the rear suspension,  apparently it swings freely.

I will try with a little of spikes adjustment.

Regards

Roberto

You have removed the little dust plugs?

G

Mine did that. Required a new BMR unit.

heihei posted:

Mine did that. Required a new BMR unit.

Probably best in the long run because having to 'poke' a speaker, 'level' it, or 'remove dust plugs' to return it to proper working order does not exude any confidence in reliability to me. Never heard of such things before, then again, it is a Naim speaker.

' Morning all,

I tried to fine adjust the base spikes, i removed the front grill but such noise and distortion is getting worse. Like our friend Massimo B. suggested,  i played a few tracks with piano and this is even more noticeable. With the grill off, to me, it seems just generating from the BMR diaphragm.

Regards

Roberto

To be fair Naim/dealers advise removing the BMR transit bolt blanking plugs as they can vibrate. Might not be the cause of this issue but it's not a design flaw - at least as I see it!

GraemeH posted:

You have removed the little dust plugs?

G

What do you mean for dust plugs ? As far as i know there are only transit bolts for BMR suspension to remove

Regards

Roberto

Little plastic caps supplied by Naim to insert into the holes in the rear plate through which your removed the transit screws. Best not to fit these as they can vibrate.

No, i have empty holes.

Visit from Italian Naim service centre is due for tomorow afternoon

Regards

Roberto

Empty holes are what you want so we can exclude this at least. Good luck.

Just a quick update, 

This afternoon our local technician came in. After a quick oscilloscope check,  it turned out a bad scratching noise at 1600 khz. So the diagnosis, just as i prefigured, is something unstick within the BMR.

I already got in touch with TomTom Audio and he' ll let me know soon.

Regards

Roberto

rsch posted:

Just a quick update, 

This afternoon our local technician came in. After a quick oscilloscope check,  it turned out a bad scratching noise at 1600 khz. So the diagnosis, just as i prefigured, is something unstick within the BMR.

I already got in touch with TomTom Audio and he' ll let me know soon.

Regards

Roberto

That's unfortunate Roberto - hope it's resolved soon.

G

GraemeH posted:

rsch posted:

Just a quick update, 

This afternoon our local technician came in. After a quick oscilloscope check,  it turned out a bad scratching noise at 1600 khz. So the diagnosis, just as i prefigured, is something unstick within the BMR.

I already got in touch with TomTom Audio and he' ll let me know soon.

Regards

Roberto

That's unfortunate Roberto - hope it's resolved soon.

G

It' s odd, since James of TTA confirmed that prior of delivery, both BMRs were changed by a Naim "field engineer"

Regards

Roberto

I hope the dealer sorts this problem out for you

i think naim should have kept the DBLS in production as they were an awesome speaker

Well, it only takes a look at a certain Suffolk dealer's webpage.

andyvk posted:

I hope the dealer sorts this problem out for you

i think naim should have kept the DBLS in production as they were an awesome speaker

Yes, he was promptly keen to sort the issue. We are waiting replacement parts from Naim. Final job will be carried out by our local service centre.

Ultimately i think Naim shouldn't demise their loudspeakers range. Issue above aside, 600s are fantastic speakers, 400s too in their own class and Nsat are still quite special

Regards

Roberto

rsch posted:

GraemeH posted:

rsch posted:

Just a quick update, 

This afternoon our local technician came in. After a quick oscilloscope check,  it turned out a bad scratching noise at 1600 khz. So the diagnosis, just as i prefigured, is something unstick within the BMR.

I already got in touch with TomTom Audio and he' ll let me know soon.

Regards

Roberto

That's unfortunate Roberto - hope it's resolved soon.

G

It' s odd, since James of TTA confirmed that prior of delivery, both BMRs were changed by a Naim "field engineer"

Regards

Roberto

This is what happens when you get farmers to fix speakers. 

That's a bit left of field

andyvk posted:

I hope the dealer sorts this problem out for you

i think naim should have kept the DBLS in production as they were an awesome speaker

And the SL2,s.