hORNS Universum MkIII - hORNS by Auotech

[Audiophile Bill]

It is written on their web page that they use Radian drivers. The 1" Radian with be diaphragm is 475be-pb. I have the beryllium version of this driver with a very similar horn (mine is jmlc 1400hz, universum has jmlc 1500hz, and from the same material). 475be is a good driver, and I heard it against TAD 2001. TAD is a "tad" better but not much and like them. I use Radian on the midrange and prefer to have family synergy.

Sami - is the uni mid range also a Le Cleach?

 

[shakti]

to my knowledge Lukas is sourcing driver and diaphragm from different suppliers. He said, that a small modification need to be done to the driver to fit the BE diaphragm. The Horns of the Universum do follow a unique curve. So no Le Cleach. He gave me the name of the Austrian Expert, who did the calculation, but I forgot, he is well known for his horn calculations, so someone will know.

If you meet Lukas on a Fair, he is very open to discuss his speakers, so you can talk to him directly or you can send him a mail.

He gave me also the precise cross over points, but as this was not important to me, I have no notes , so I forgot as well... Sorry :-(

 

[bonzo75]

If it's an Austrian expert it will be David haighner

 

[kodomo]

to my knowledge Lukas is sourcing driver and diaphragm from different suppliers. He said, that a small modification need to be done to the driver to fit the BE diaphragm. The Horns of the Universum do follow a unique curve. So no Le Cleach. He gave me the name of the Austrian Expert, who did the calculation, but I forgot, he is well known for his horn calculations, so someone will know.

If you meet Lukas on a Fair, he is very open to discuss his speakers, so you can talk to him directly or you can send him a mail.

He gave me also the precise cross over points, but as this was not important to me, I have no notes , so I forgot as well... Sorry :-(

Did they change it? They were not (and still does not look like that) special curves. I remember when they first built it. The midbass horn was a JMLC200T and the tweeter horn was a JMLC1400. I think the crossover point was somewhere around 350hz for the bass horn to JMLC200T and they crossed around 3.5khz to the tweeter horn. You could get these same horns from autotech and I think you can still do.

They built spherical tractrix and JMLC horns for me too so I was in contact with them some years ago. Overall a good company to deal with. I bought about 5 pairs of horns from them.

 

[Audiophile Bill]

Did they change it? They were not (and still does not look like that) special curves. I remember when they first built it. The midbass horn was a JMLC200T and the tweeter horn was a JMLC1400. I think the crossover point was somewhere around 350hz for the bass horn to JMLC200T and they crossed around 3.5khz to the tweeter horn. You could get these same horns from autotech and I think you can still do.

They built spherical tractrix and JMLC horns for me too so I was in contact with them some years ago. Overall a good company to deal with. I bought about 5 horns from them.

Hi Sami,

Agree that JMLC 200T was the exact horn I had guesstimated that it was too. Would seem odd to use a totally different geometry to their plethora of products (IWATA, min phase, Tractrix, exponential, jmlc, ejmlc).

 

[Duke LeJeune]

It is a Radian magnet but the beryllium diaphragm is sourced separately and customised to Lukasz's specification

To the best of my knowledge there is only one manufacturer of true Beryllium diaphragms for compression drivers, namely Materion, who sells them under the brand name "Truextent". My understanding is that Materion is Radian's source for their Beryllium diaphragms.

So I would be surprised if the diaphragm itself is customized as the tooling is very expensive and the diaphragm would need to have identical dimensions to the unit that Radian uses in order to fit in their driver, but the voice coil and/or voice coil former and/or surround could be customized.

I use the Beryllium diaphragm version of Radian's 475PB in some of my designs.

 

[bonzo75]

It is written on their web page that they use Radian drivers. The 1" Radian with be diaphragm is 475be-pb. I have the beryllium version of this driver with a very similar horn (mine is jmlc 1400hz, universum has jmlc 1500hz, and from the same material). 475be is a good driver, and I heard it against TAD 2001. TAD is a "tad" better but not much and like them. I use Radian on the midrange and prefer to have family synergy.

They are using the 2" 950pb beryllium

 

[kodomo]

They are using the 2" 950pb beryllium

That is for the JMLC200 horn, 475 is behind the smaller JMLC horn.

 

[bonzo75]

That is for the JMLC200 horn, 475 is behind the smaller JMLC horn.

I thought they had a tweeter with a polyester diaphragm. Only the 950 was beryllium

 

[kodomo]

I thought they had a tweeter with a polyester diaphragm. Only the 950 was beryllium

You actually need the beryllium not to have higher break-up modes. Fo the operating bandwidth of JMLC200, it does not add much, it is a luxury whereas for the smaller horn, it can be considered a necessity.