knck, knock.


Hi,

 

New on this forum and already a (simple) question. I have owned a pair of Yamaha FX-1 speakers (bought new) for thirty-eight years. In my opinion (and hearing) they sound quite nice. But yes, as an audiophile you are always working on perfecting your sound in such a way that you want the "net curtain" between reality and the installation as thin as possible. And so I had them upgraded in 2018 by a friendly relationship at Yamaha in Japan (as far as possible) by, among other things, (better) filter parts, internal cabling, etc. Everything was done neatly (the bill too!). But now it comes, when I tap the dust cover of the woofer of one of the speakers with my finger, I hear a kind of reverberation in the box very softly. The other box does not suffer from this. Swap woofers, same result. So it is not the woofers. Ask that friend that he doesn't have this when testing. Yes, of course you are listening to music and not tapping on a dust cover all the time (doesn't seem to me either). I should never have performed that action, but yes, it annoys me, and it is not immediately apparent, it gives me the idea that this reverberation influences the music scene. Of course it doesn't have to be that way, but still. Maybe one of you has an idea ....

Of course I am not working on it all the time, but the fact that various professionals have looked at it in recent times and had no idea how things could occur, well ... possibly looking at other speakers. Although I do like the directness and "live" beliefs of these "old boys" but of course there are always better ones.

 I am also quite satisfied with the sound I have now, because I do go to fairs (high-end Munich and Las Vegas) and there you can of course hear and see the so-called Top of the bill, of course with a ditto price tag and I have not yet run into the tree at a garden center that has other "leaves". Because if I ever visit other audiophile friends, for a listening session and who do not have a nauseous installation (B&W 800D3, Wilson Audio, Magico M2), I still go home with a feeling of yes, I can also come along.

And to think that I started my audiophile "career" with a Philips pick-up with built-in speakers, God, I was so happy, stereo still, but as more money was saved, the pick-up was exchanged for a B&O tape recorder with built-in mixer and amplifier of about 10 watts and separate speakers of course also from B&O. Boy, another audio world just opened up for me. Then it went a little faster. From various Sony's front-end amplifiers, to Yamaha also front end, McIntosh, ML, Audio Research to the current Accuphase. The speakers have also changed over the years. from the B&O to Engasound 3KF, B&W P2 (both with plasma high from Fane) AR 10 pi, LST (both Aucoustic Research) Yamaha NS 1000, FX-3 (both I still have, also modified) to the current FX- 1. The two with plasma high were (and are) unbeatable due to the absence of mass. (whatever is said about diamonds today). Only they cannot (yet) produce that much sound pressure. And then the necessary cable work of various kinds. (Kimber, Audioquest) To give you an impression of my audio past 

Wim.

 

 


wmw01
When you say you hear reverb, do you mean a distinct echo, or is it more like a string after it has been plucked?

Most likely if the latter it's some aspect of the cabling.  Using wire ties or similar may help.  Could also be a crossover board or some such which needs better attachment.
Thats interesting you mention that Erik.  I was knocking on the side of one of my speakers and noticed a reverberation and couldn’t figure it out.  Opened it up and it was speaker wire rattling against ghe port tube.  Slapped some blu tak on it and problem solved...
So something is making noise? WOW that was quit a read. Rattling around inside the box? Loose wires, loose screws, loose XO, LOOSE, port. Loose, goose? Got ya...

Regards
Wim,

When you say "swapped woofers, same result" you mean you moved the woofer from the left speaker into the right speaker, and vice-versa, and the issue stayed with the speaker cabinet. The knocking sound did not move with the woofer, correct?

In that case, it has to be something inside of the cabinet. Take out the woofer and look/feel for anything loose, like the wiring or a crossover component/board or an internal brace. Also check all of the screws in every driver and the crossover board to cabinet.

How heavily are you tapping on the dust cover? Would seem to me that if you tapped it hard enough to cause a knock, you would be denting the duct cover. Are you actually tapping the cone and not the dust cover?

So, you hear a knocking when you tap the dustcover, but your friend from Yamaha doesn't hear it? Do you hear an actual degradation when playing music? If not, forget about it and stop tapping the dustcover.
Yes, Reubent, it might be better not to pay any attention to it, because otherwise it will become obsession. That friend has not done this stupid thing. Yeah, who actually does something like that. 
No, I had just taken the plan to do something about the damping material, but I will let go.

Wim.