Time Domain measurements?

[fosti]

On another issue. I think comb filtering is a time phenomenon too so why is that off topic ?

Good to mention, narrow or slim column speakers have more problems with comb filtering than a Grimm LS1.

 

[haraldo]

A picture

There is clearly an off-center location of the beryllium tweeter on the ARA in the background there .... are you changing the geometry or just testing to see what works best?

Good to mention, narrow column speakers have more problems with comb filtering than a Grimm LS1.

I clearly prefer the very narrow speakers .... insane imaging .... but that is my personal preference
I heard some great "wide" speakers like stuff from Audio Note .... but the ultra-slim speakers are champs IMHO

 

[Joachim Gerhard]

There is clearly an off-center location of the beryllium tweeter on the ARA in the background there .... are you changing the geometry or just testing to see what works best?



I clearly prefer the very narrow speakers .... insane imaging .... but that is my personal preference

I use a program called The Edge to find out the best location of the drivers.

 

[Joachim Gerhard]

Here we go.

 

[Joachim Gerhard]

Another example of a wide speaker in my program. It is not a best seller, far from it.

 

[haraldo]

I use a program called The Edge to find out the best location of the drivers.

continuous improvement?

 

[fosti]

...I clearly prefer the very narrow speakers .... insane imaging .... but that is my personal preference
I heard some great "wide" speakers like stuff from Audio Note .... but the ultra-slim speakers are champs IMHO

maybe you like them but have a look at the whitepaper from Grimm
"Psychoacoustics tells us that
below about 300Hz the ear will no longer clearly discern
direct sound, first reflections or reverberant sound. Presumably
the evolutionary background of this is that the
vocal range starts here. Anyhow, we can live with a
transition to omni below 300Hz. If we can get reasonable,
constant directivity above that, we have a design
spec!"
Source: Speakers white paper

 

[fosti]

Another example of a wide speaker in my program. It is not a best seller, far from it.

....Besides one of them are all small columns .....

That was the one I mentioned, but obviously you didn't get it. Can happen...

 

[tuga]

I make rather wide speakers too. This is the Suesskind Puls wideband.

I was referring to the constant directivity. How wide is it?

 

[haraldo]

maybe you like them but have a look at the whitepaper from Grimm
"Psychoacoustics tells us that
below about 300Hz the ear will no longer clearly discern
direct sound, first reflections or reverberant sound. Presumably
the evolutionary background of this is that the
vocal range starts here. Anyhow, we can live with a
transition to omni below 300Hz. If we can get reasonable,
constant directivity above that, we have a design
spec!"
Source: Speakers white paper

thx , I will read tomorrow ....

if you listen to a Guarneri violin it has a totally changing directivity in space depending on what frequency is playing.... this is extremely difficult for a speaker to reproduce so that it sounds like the real thing. I claim there is no loudspeaker that can relicate these directivity patterns .... I have no idea what is the best way but I know what I can hear...

probably there is just no one best speaker that does it all .... but overall the narrow speakers are the ones that works best on most music to to my ears ... but there is for instance great challenges with a grand piano as there is just not enough cone area in the narrow single woofer/mid loudspeakers to reproduce the incredible dynamics of a Steinway model D .... well, these are extremely difficult for any speaker

i am not confident the Grimm’s can do this either

if it’s difficult, it’s fun

 

[fosti]

Another example of a wide speaker in my program. It is not a best seller, far from it.

Design is promising, but driver suspension does not look like a quality hero:

 

[Joachim Gerhard]

maybe you like them but have a look at the whitepaper from Grimm
"Psychoacoustics tells us that
below about 300Hz the ear will no longer clearly discern
direct sound, first reflections or reverberant sound. Presumably
the evolutionary background of this is that the
vocal range starts here. Anyhow, we can live with a
transition to omni below 300Hz. If we can get reasonable,
constant directivity above that, we have a design
spec!"
Source: Speakers white paper

Where is the peer review?

 

[Joachim Gerhard]

Design is promising, but driver suspension does not look like a quality hero:
View attachment 74235

This driver costs 10x more then most.

 

[Joachim Gerhard]

Good to mention, narrow or slim column speakers have more problems with comb filtering than a Grimm LS1.

In what frequency Range ?

 

[fosti]

Where is the peer review?

Talking about peer reviews .....where are extensive measurements of your speakers in the manner of sound&recording and neumann or genelec do:
https://www.soundandrecording.de/equipment/neumann-kh420/
Saying a flat on axis frequency response is easily to achieve, but then not showing the off axis behavior of ones own speakers. This is a little snobbish and not scientific.
Edit: 3 blue letters

 

[fosti]

This driver costs 10x more then most.

That does not mean, they are necessarily better.

 

[fosti]

In what frequency Range ?

Those small columns are omni up to 1kHz. You will have more problems with first reflections than with a speaker that has a narrower dispersion in the frequency range from 300Hz up . This omni behavior makes placement in the room difficult.

 

[fosti]

Design is promising, but driver suspension does not look like a quality hero:
View attachment 74235

I meant the damage(?) in the suspension between 8 and 9 o'clock...

 

[Joachim Gerhard]

Talking about peer reviews .....where are extensive measurements of your speakers in the manner of sound&recording and neumann or genelec do:
https://www.soundandrecording.de/equipment/neumann-kh420/
Saying a flat on axis frequency response is easily to achieve, but then not showing the off axis behavior of ones own speakers. This is a little snobbish and not scientific.
Edit: 3 blue letters

I plan to send a pair of my speakers to Amir. Then you can compare to others that have being measured here before. On the other hand most of my customers are privat and non of them has ever demanded that I provide off axis measurements. I have the means to do that though.

 

[Joachim Gerhard]

I meant the damage(?) in the suspension between 8 and 9 o'clock...

This is a prototype and damage like that can happen when you move the speakers to shows and magazines. When I sell a pair like that I make certain that there is no damage. Customers do not accept damage anyway. Thanks for looking thoug.