Genelec 8351B Teardown (2nd Disassembled)

[Impossible]

Yes one would try and get something closely matching the dispersion as possible. Mids and woofer would stay identical.

Come on Genelec if you are listening just do it for us 8361A-Be

Suppose they will need to work with truextent due to patents likely.

 

[dfuller]

Do you think you could use some heat and remove the tweeter from the glue?

Test the tweeter independently.

Find a matching tweeter, something that would work as a good replacement.

3d print a small part if needed.

And put a new tweeter in?

I want beryllium

Why?

 

[Impossible]

Because working with beryllium isn't easy genelec has not done it before. It would be a big undertaking to make their own also avoiding any existing patents from manufacturers. By the way I'm only talking a out the dome part of the tweeter here.

It's the same reason many of the other components manufacturers, not just speaker manufacturers don't make their own.

 

[YSC]

Because working with beryllium isn't easy genelec has not done it before. It would be a big undertaking to make their own also avoiding any existing patents from manufacturers. By the way I'm only talking a out the dome part of the tweeter here.

It's the same reason many of the other components manufacturers, not just speaker manufacturers don't make their own.

Be is also hazardous if damaged. Not to say cost a lot, I don’t see why genelec would want to use be instead when their tweeter is performing perfectly right now. Yes Be could have lower distortion at higher SPL but the required driver travel would likely mess up the mid woofer distance and the directivity.

 

[voodooless]

Because working with beryllium isn't easy genelec has not done it before. It would be a big undertaking to make their own also avoiding any existing patents from manufacturers. By the way I'm only talking a out the dome part of the tweeter here.

It's the same reason many of the other components manufacturers, not just speaker manufacturers don't make their own.

I think he means: why bother with beryllium at all?

 

[EJ3]

I think he means: why bother with beryllium at all?

It's a highly dangerous substance. Taking the right protocols is very expensive.

 

[voodooless]

Yes Be could have lower distortion at higher SPL but the required driver travel would likely mess up the mid woofer distance and the directivity.

As you can see here:

It does pretty well at 106 dB given that in real audio level would be down 30 to 60 db at high frequencies, there is absolutely nothing to worry about.

 

[Pearljam5000]

8351BE is a dream of mine
They could buy the tweeter from Focal and be done

 

[YSC]

As you can see here:

It does pretty well at 106 dB given that in real audio level would be down 30 to 60 db at high frequencies, there is absolutely nothing to worry about.

That’s why I am suggesting there’s absolutely no reason to use such exotic yet dangerous material

 

[Impossible]

The general consensus is beryllium is a better material. I'm sure you could google all the pros and cons. Con being the cost. Manufacturing and safety has already been mastered where a bunch of manufacturers have been using it for years.

For me I only want that low THD sparkle in my treble in a concentric design. TAD being super expensive and lacking dynamic range.

 

[voodooless]

That’s why I am suggesting there’s absolutely no reason to use such exotic yet dangerous material

I know I just have the feeling that other people don’t quite get it yet. Good reason to double down

 

[YSC]

The general consensus is beryllium is a better material. I'm sure you could google all the pros and cons. Con being the cost. Manufacturing and safety has already been mastered where a bunch of manufacturers have been using it for years.

For me I only want that low THD sparkle in my treble in a concentric design. TAD being super expensive and lacking dynamic range.

when the original tweeter don't have a distortion problem to begin with?

 

[Impossible]

I'm not sure if that's true, first breakup for aluminium or titanium is around 10khz. Don't forget the speaker is active with correction. Where beryllium it's around 16khz.

 

[Pearljam5000]

If they used titanium instead of aluminum
That would also be a an upgrade ,no?

 

[YSC]

I'm not sure if that's true, first breakup for aluminium or titanium is around 10khz. Don't forget the speaker is active with correction. Where beryllium it's around 16khz.

If it don’t show up in FR nor distortion at reasonable levels, why bother? Don’t remember a lot of manufacturers don’t have those issues with the Al tweeters in non dsp speakers, even only for genelec, the 80x0 analog series don’t have those issues also, changing to more exotic materials don’t increase in anything meaningful except price, and maybe the hazard involved to slightly damaged tweeters, say poky fingers from childs

 

[Pearljam5000]

If it don’t show up in FR nor distortion at reasonable levels, why bother? Don’t remember a lot of manufacturers don’t have those issues with the Al tweeters in non dsp speakers, even only for genelec, the 80x0 analog series don’t have those issues also, changing to more exotic materials don’t increase in anything meaningful except price, and maybe the hazard involved to slightly damaged tweeters, say poky fingers from childs

Then why is Neumann using titanium and not aluminum ?

 

[YSC]

Then why is Neumann using titanium and not aluminum ?

there are different routes to excellence, when it's achieved, why bother

 

[srrxr71]

Well the one part of the Genelec ones driver that is protected is the tweeter. It has a grill around it. So breakage arguments don’t apply.

Anyway maybe they will one day maybe they won’t. I guess it’s the only thing that they could do to improve on near perfection.

 

[Sancus]

The general consensus is beryllium is a better material. I'm sure you could google all the pros and cons. Con being the cost. Manufacturing and safety has already been mastered where a bunch of manufacturers have been using it for years.

None of that implies there would be any audible improvement.. There really isn't any evidence that the 8351/8361 tweeter has any kind of significantly audible issues.

I personally think Be tweeters are more about bling and "uniqueness" than the material properties. They don't seem to make much difference in measurements usually and having heard Be Revels and non-Be I didn't think there was a huge treble difference. I mean does this look like a speaker that has significantly better treble than this? Sure doesn't to me.

Personally if I was wanting to upgrade the Ones I'd be looking to improve the bass, it could use some form of cardioid or other directivity improvement without the huge/expensive W371A. But that would necessitate redesigning the entire cabinet so it would end up an entirely new product in terms of development and manufacturing.

 

[Descartes]

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Second time, I disassembled my 8351B again.

This time, I opened the speaker driver side and took a picture in more detail.

I wanted to disassemble the tweeter, but it was glued so I couldn't remove it.

The woofer looks like paper and the center is filled with solid foam.

The mid-tweeter driver is not directly screwed into the enclosure, but is pressed by the rear panel.

The notes on the amp module are curious.
This is 8351B, why is the amplifier module marked as 8341A? It seems to be a compatible part.

Then, I hope you enjoy it.

Looks like they use the same amplifier and charge substantially more money!