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Home » Horn-Loaded Speakers» New superlative horn build - ESD acoustic (93 posts, 5 pages)

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05-18-2018

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Romy the Cat

Boston, MA
Posts 10,160
Joined on 05-28-2004

Post #:	26
Post ID:	24870
Reply to:	24869

Some afterthoughts about the ESD Acoustic horn speakers.

Well, I do not like the ESD debut. It was not well though and not well executed. The sound that they demonstrated is kind of less relevant. Sound look like was nothing interesting to say the last, sorry it is too obvious at the video clip above in comparing to the sound of other installations. My apologies with Josh that I did not share his enthusiasm.

I feel I need to say something about the overall ESD debut. For a person well oriented in horn universe there is a lot to remark.
There are 3 very positive aspects in the ESD debut.

1) A progressively altering the horn’s slope with respect to the channel frequency. I very welcome to this idea and feel that it is how it should be.

2) A new line of compression drivers. It looks like a lot of work wen to it and it would be very interesting to hear more about it.

3) A commercial 5ch multi-amping application. It is not perfect and it come with active not passive crossover and presumably bad quality but it is to the best of my knowledge first in recent commercial hi-fi.

Of because there are many unfortunate aspects in ESD debut.

1) Horns pricing. The set of the carbon-fiber horns cost over $370,000 according to Herb Reichert. It is not expensive, it is monumentally stupid, regardless of the horns design. The mold hors are cheap to make if you have already tooling and regardless of the “kinky” cavities that ESD filed with Taaffeite the cost of the horn should be $3-$4K. What Avantgard was first introduced 18 years back they sell the horn $500-$800 each. And you know what? They sold zillion of the speaker around the world. I do want to see a fool who would pay $370K for the horns. I can easy proof that those hoe cost 100 time less and I can official challenge the ESD. Of you take the playback the was presented in Munich and substitute the carbon-fiber horns with paper-mache analog then I assure you that the overall sound of the system will not be changing. So, it would be a legitimate question: what $370K is for?

2) The exponential-centric profile. I understand that it is faster opening but here is what I disagree with Bruce. I have so many arguments for my opposition and I think that in private conversation Bruce would agree with my arguments. Why he went for exponential-centric profile is beyond my understanding. I think he wanted to provide the Chinese folks with more bottom octave EQ but he well knows the consequences of it. Anyhow, I am a bit puzzled with it.

3) A price of compression drivers. The $265K a set. Well, it is kind of stiff, cindering that electromagnets should be less expensive then perm magnets drivers. Price-vise the ESD put itself above GOTO, ALE, GIP, Wolf von Langa, Cogent and the rest of them. Kind of unfortunate and not very smart in my view.

4) Big close-bottom horn must not be the last LF devise in a playback. I wrote about it sirloin times. Asking the money as they ask and offering a servilely compromised by topology system is not intelligent in my view.

5) The electromagnets do not work out with horns and if they do then the drivers need to be closed much more conservative then perm magnets. The electromagnets tend to give much more honk then they should and in case of ESD the combination of electromagnets, exponential profile and overdriving the horns with LF is pure recipe for disaster. From what is heard at the video above is the evidence that the disaster was filly harvested.

I do think that ESD need to work on the playback quite more. I disagree with Mr. Reichert that “a hornspeaker of this dimension needs the listener to be at least four or five meters from the mouth of the largest horn” Macondo is the same dimension, probably larger and it does very fine from 3 meters or even 2.5 meters from the mouth of the largest horn. I like when the audio professionals express a “reference” opinion without having any familiarity on the subject. The ESD need to change the frame and to bring themselves to Macondo topology, to time-align the drivers, to implement sensible fixed crossovers and introduce a complimentary LF channel. Then they need to have a demo room in Europe or US with permanent properly calibrate and well performing installation, while dropping the price dramatically. If cost has any equivalent to sound quality then looking at the engineering investment ESD made in the design of this playback I value the cost of the whole ESD room not more then $40K. At the today world the Avantgard Trio with their plastic horns, cheap ceramic ferrofluid -damped compression drivers, passive filtration and price tag of I believe $70K is much more mature acoustic system, unfortunately.

Does ESD has a prospective? Unquestionably. Let see where they will navigate themselves.

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

05-18-2018

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anthony
Posts 338
Joined on 08-18-2014

Post #:	27
Post ID:	24873
Reply to:	24869

Saturday?

martinshorn wrote:

So thinking stereophile was there thursday...

Reichert mentions Saturday twice in the article. Not that is really matters. He did not like them, the youtube video sounds horrible but you heard something interesting and for me that is hardly a conundrum or something to stress about.

I think that Romy does make some valid points though. Like he, I am struggling to understand the how ESD expects to make market inroads with a product that costs US$835,000 but looks half-arsed and half finished. Those big bass horns are never going to look good in any room and carbon fibre is pretty much the last finish I would opt for on any luxury item...it is not nice! The horn stack seems uninspired and very Cessaro-like and ho-hum for something that costs half a million clams...crikeys, where is the imagination?

Please do not think that I have something against big and heavy speakers, my system weighs 2 tonne and I have made little effort to make things lightweight or even particularly small, but at least I have used some imagination in designing and putting the system together whether people like it or not. The ESD stuff seems quite slapstick, sort of like it is a first draft of something that might need another two or three big revisions. The room limitations that the big bass horn introduces means that they will have to be stuck in the corners and then there is the carbon fibre thing again...what room is that going to look ok in? How do you decorate with carbon fibre? In Kodomo's thread Romy used the words "typical audio torture chamber" and I think that there is no way these speakers can be placed in anything but a room that is not nice to be in.

Then there is the competition. There are plenty of big horn speakers that can look really nice in a room and are a fraction of the price: Tune Audio and Avantguarde come to mind or some of the WE replicas. These are luxury items that first and foremost need to fit into a luxury environment and carbon-fibre and big stacks of silver boxes just do not cut it...not even in the same league. That's three times that I have mentioned carbon-fibre; four now; what were they thinking? Or am I just a little bit too sensitive?

Of course, all of this is quite apart from the sound of the things. They may be able to be made to sound transcendent given time, and even if they do manage to get over the limitations of the bass-horns, time-alignment and who knows what else I can't see someone paying a tremendous sum to put something into their room that will make the room into something not pleasant to be in.

05-19-2018

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xandcg

Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #:	28
Post ID:	24874
Reply to:	24873

Marketing.

All their marketing is wrong in several ways. Some of them:

1 - the website (beyond the fact they are using some BS template you can buy for a few bulks, and all them them are buggy, slow and insecure) have a page to make an appointment to their showroom but there is no address. On the website have two possible address one in California and another in China.

http://www.esdacoustics.com/index.php/about/showroom.html

2 - the price. The price is something that should be strategic thought when dealing on luxury market. One time you set it you cannot make it go down just up, or all your business will lose value and respect from the clients. Have you ever seen Rolls-Royce lowering their prices? With the price they are advertising they should (at very minimum) find a way to get the best room of the show, and not a pocket room.

3 - When someone want something made of carbon fiber (and it is not for pure industrial/commercial usage), 99% of the time they want carbon fiber that looks like carbon fiber, with those classic stripes, and not something that look like cheap industrial plastic/ribbon.

Taste is personal thing, but carbon fiber can integrate very well if done properly almost anywhere. Look for some Bentley Mulsanne (or any) with carbon fiber finishing in its interior. EX. And you still have colored carbon fiber to make the things even be.

But the most funny thing about all of that is the price. Chinese are well know to be cheap, including the rich ones when dealing on the luxury market. They always want to pay little to nothing for everything. The Swiss banks (for instance) in Singapore know them very well. They want the bank to make a lot of money for them (talking about investment banks) and pay zero interest to the bank, more like they require it.

Think for yourself, do not be sheep.

05-19-2018

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decoud
United Kingdom
Posts 247
Joined on 03-01-2008

Post #:	29
Post ID:	24878
Reply to:	24874

Decoration

The worst of it is there is no logic in using carbon fibre. They could have made a case for ekoa, but that would require some imagination.

05-19-2018

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Paul S
San Diego, California, USA
Posts 2,658
Joined on 10-12-2006

Post #:	30
Post ID:	24879
Reply to:	24878

Boy Toy

What isn't made of carbon fiber these days?

Paul S

05-19-2018

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Romy the Cat

Boston, MA
Posts 10,160
Joined on 05-28-2004

Post #:	31
Post ID:	24880
Reply to:	24870

The wet dream of audio and ESD

I would like to share more of my troughs about the ESD acoustic. That are not truly the troughs about the company but rather the troughs that come to mind inspired by the company come to existence.

I do feel that it is an ultimate we dream of ether audio consumers or audio makers to have a truly great performing let say 40Hz midbass horn available. There are none of them available, I mean great performing and whatever is available is garbage. I do not insist that great 40Hz might be given only by midbass horn, the midbass direct radiators can do fine, particularly if some high-end approaches are used. Still, if you your mind operates under a reasonable delusion that midbass horn is a key to everything then do want to write a check and to have a fully operational 40Hz midbass horn siting in your listening room. Most sensible audio people do understand that it never happens but it is a wet dream, do not ruin anybody’s fantasy.

Here is where ESD come to the play. They sell their merchandises as individual parts, thus targeting the DIYers and their midbass horn might be a solution. I less care about the rest of their installation as with the seriousness they approach the subject and the price they tag their solutions they effectively killed own company prospects. Still, I would like to salvage for ESD their midbass horn and the only reason is because they own the whole the full stack of audio elements necessary for proper midbass horn functioning: amplifier, crossover, driver and horn. As a stand-alone solution, properly priced and properly implemented it might be a very interesting product.

I less care about the ESD prospects to make money and my concern is to progress and keep the torch for the idea of horn-loaded playback applications. The ESD folks have already declared themselves as fools investing into the idea that they can make money on audio. If intend of audio they invers own carbon-fiber manufacturing efforts into push up bras or sexy spatula kits then it would be way more profitable direction for them. They were fools, no different then you and me, they decided to fish in murky water audio, good lick with that. Well, probably I have to exclude myself from the group identity of fools and I do not do any audio for profit. But it is not the point. The point is that ESD own full stack for 40Hz midbass horn and they willing to do it commentary and a complete solution. Good for them, let play alone.

Let to dissect what they offer and what they should offer (in my opinion) to be considered “interesting”.

I do not know anything about their compression driver. I do know that it hardly needs a lot of magnetic force. Probably it is 4-5” of exit and probably it has relatedly low suspension and low resonance. I would like to have 5 things variable for this driver/horn

1)      Voltage I drive across the electromagnet, I do not share their objective to go for high flux.

2)      Ability to change the back chamber damping by adjusting a release valve or use the acoustic semi-transparent felt gaskets. Would use to tune the Fs of the driver, load to a given room to the horn’s lower passing frequency.

3)      Ability to apply negative voltage or positive current feedback to the power amp, setting precise the amp output impedance. Will be using the cancel out suspension influence.

4)      An adjustable crossover with 1 or 2 order high-pass and 1-4 order low pass.

5)      To have the interchangeable middle section of midbass horn able to accommodate 0 degree and 45 degree angle.

I think this set of tools would make it an interesting midbass horn package. It would be increasable interesting to play with it. I do feel that it is would be very possible that the field-coli driver would not be the essentials part of the package and some kind of low cost ceramic magnet driver might be used since they are in SS amplification realm. OK, now the punch line of the whole thinking. Buckle up… What I would like to have in the end of it would be the ESD’s knowhow to optimize the midbass horn operation in a “random”. Pretend you have a ship-drop the midbass horn, you play ESD’s test CD, put the calibration microphone at your listening position and the ESD amps know how to set all parameters of the ESD’s midbass full stack. It is not about the QEing the room but rather to setting up a proper bass texture, that no one know how to do; and if they do then no one have proper tools; and if they have proper tools then they spend 20 years of own life to learn how to do it…. If ESD can deliver it in one package then it would be great, I feel.

Rgs, Romy The Cat

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

05-19-2018

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xandcg

Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #:	32
Post ID:	24881
Reply to:	24880

I give up.

I already give up of commercial available audio products since a few years ago. I come with the conclusion I will never find a nearly ideal solution readily available anywhere. Tune Audio Anima is the only horn product what probably would fulfill my interests as-is, but just when the available space is limited and/or the system is secondary.

These days I still have an eye on the audio market just to see if someone come out with supposed better drivers than GOTO/ALE, or if I find someone who I feel is better to execute what I want than my current selection of 'professionals'. But this time is also ending because I glimpsing me ordering all the things still this year.

Cheers!

Think for yourself, do not be sheep.

05-20-2018

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martinshorn
Germany
Posts 114
Joined on 04-14-2017

Post #:	33
Post ID:	24882
Reply to:	24880

Doing the math

I digged a bit into the doubt of the sub doing 17Hz.
Im using AJhorn, which has proven to be an extremely reliable forcaster in many many cases.
Now, i put all information available from Dai + website in the app. It gives me the following result:

Now what i dont have of course, is majority of TSP.
Well however i can estimate the rough range within + - around something that makes sense.
So the result above will not be out of space.
Though, i played a bit with the values (TS) to see what influences a lot.

My conclusions: - the fs is always introducing a knee of 2nd order hipass, regardless of anything else, in case of this horn you see its
- the flux will only lower Qm and Qe, which is only boosting the sensitivity -> more flux = more output, less flux = less output -> linear behavior
- looking at the graph obviously, the horn doesnt work any better than a k-horn apart from better low-mids due to less foldings
- i also played with different flares and im surprised, Edgar is right, the hyperbolic shape is resistive canceling out the mouth reflection at 50Hz, no other shape can do that well in this configuration

05-20-2018

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martinshorn
Germany
Posts 114
Joined on 04-14-2017

Post #:	34
Post ID:	24883
Reply to:	24882

Lower flux simulation

Now the same graph black...

Equivalent to lower flux, i increased the Qe from 0.15 to 0.35 and the Qm from 3 to 7. Result in red curve. Only worse, in all aspects. Edgar Bruce's theory that TSP does not matter and flux cant be high enough seems to remain true here, as the horn (like Edgar sais) mass load outrules the drivers (electrical relative) suspension (to some extend).

The green curve shows same driver as red but with 40 liter volume on the back (before was 10 liter). That should give idea about back ventilation, lower fs, softening suspension etc. the lowend is slightly better, though actively controlled by filters it wont make a difference at the end (apart from some milivolts less input below 40 cycles).

This reminds me on some white papers from JBL saying (like everyone but i expect JBL to have it tested & proven) the backchamber of driver should always be as small as possible. Also Edgar wrote once smaller back chamber gives deeper base. Which sounds rather like an perceived difference. In fact, smaller backchamber as you see increases fs and Qt. Which means u gain 1 dB in upper bass (explains Edgars deeper bass perception) but you loose many more in the deep low end. So to me looks like the bigger the rearchamber the better.

05-20-2018

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Romy the Cat

Boston, MA
Posts 10,160
Joined on 05-28-2004

Post #:	35
Post ID:	24884
Reply to:	24883

Oh, God, please not again.

Josh, you are committing the same mistake as many people before you. I always fought with this way of thinking at my site to the point that I encourage people to take this type thinking somewhere else and do not expose it at my site, giving by it some publicity. I do not want to give at my site a publicity to fundamental erroneous ideas. The mistakes you do, very much the same that infested the DIYAudio.com site and many other communities: you guys operate under pretense that simple horn circulation algorithms like Hosnres, AJhorn and many others or T&S characteristics of drivers give you any idea how a loading horn will be sounding. That is rubbish and I did educate the horn people about it many many times. Sorry to say it but everything that you wrote in your two pasts above has absolutely no sense. Please do not take it personally but the thinking above and the rational you use for your thinking has absolutely nothing to do with reality of sounds horns makes. If you care about propagation of atmospheric pressure in space then deal with pressure predictors but it has absolutely nothing to do with Sound.

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

05-20-2018

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martinshorn
Germany
Posts 114
Joined on 04-14-2017

Post #:	36
Post ID:	24885
Reply to:	24884

Ah ah, pressure not sound !

Sorry Romy, dont say i said how it sounds. I did not. In fact i was just about to take back the statement of not doing better than a K-horn.

Let me put it straight. Above shows what is possible (more or less) in terms of pressure. It shows the horn will not provide pressure below 50 cycles. And this is likely to be true. It will not magically appear out of nowhere. This does not exclude possibility that in some rooms due to modes it might sound full till 40 Hz. But 17 never ever.

Above also shows an extraordinary sensitivity from one small single 10" radiator. So in fact, i think it easily compeeds with the k-horn in terms of "loudness" (only the boom, nothing else im refering here to!!!). Thats great and shows that the horn itself is more efficient. Which comes along with all advantages and disadvantages of using a smaller lighter driver without (the usual) sensitivity loss. thats good.

What you say however is important. Lot of people try to make horns using only the simulator, and later is sounds dreadful. The "loudness over frequency" might still correlate (with slight deviation) to the simulation. And thats all the simulator promised Smile

There is no scale of quality or pleasure. Neither did i say that.

Doing many many many horns... I think i see some correlations of what AJhorn shows and when a system sounds good. It might not be where you expect it. I found it in the impedance. Both pressure and electrical. When you have a very flat linear bump-free impedance, its correlating with avoidance of resonance. The pre-chamber, the throat, the flare, the mouth, the surrounding, even the phaseplug etc etc etc can have a mass-reactance and resonance. These things should be avoided. So, instead of fishing 100% in the dark, lot of try&error, you can at least clear out lot of rubish with AJhorn, striving for good pressure & electrical impedance, and 2-3 out of 10 mockups you trash before building. Very nice.
I also see most (8 of 10) people do not fill out the forms properly. Everyone disregards cone to throat distance, actual compression on the phaseplug, plug flare, corner efficiency (acoustic transparent floor or wall) etc just to name a few.

So shit in, shit out. Most cases.

Best you can input -> get a rough idea of whats possible

My view...
cheers
Josh

05-20-2018

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anthony
Posts 338
Joined on 08-18-2014

Post #:	37
Post ID:	24887
Reply to:	24885

Corner loading?

martinshorn wrote:
Above shows what is possible (more or less) in terms of pressure. It shows the horn will not provide pressure below 50 cycles. And this is likely to be true. It will not magically appear out of nowhere. This does not exclude possibility that in some rooms due to modes it might sound full till 40 Hz. But 17 never ever.

Hey Josh, what space have you simulated this horn radiating into? I ask because they are obviously designed to be fired into corners and the walls/ceiling used to further load the driver and extend the horn: another fold if you like. You may find that a 20Hz quarter mouth horn such as this one may get lower than 50Hz when it is loaded into pi/2 space.

05-21-2018

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martinshorn
Germany
Posts 114
Joined on 04-14-2017

Post #:	38
Post ID:	24888
Reply to:	24887

Quarter space

Hi Anthony,

i took ground + 1 wall. Which gives quarter space. Some may say distance to second wall is way below quarter lambda, so you could even take octa-space. But my K-horn experiences (which is 8th sp. calc) goes along with Bruce Edgars oppinion. 8th just doesnt work out. He blames the buildings, i tend to agree.
I know one guy who estimates about 0.707 of energy bouncing back from an average thin brickwall / wood floor. That can also xplain a lot and move theory and reality much closer together.

cheers
Josh

06-09-2018

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xandcg

Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #:	39
Post ID:	24926
Reply to:	24888

Custom specifications.

I was thinking ESD drivers may have a true advantage over ALE/GOTO/Others (apparently they actually know how their drivers work) if that allow to someone design the horn exactly the way he/she want, and later order the driver with custom specs to match the horn.

Think for yourself, do not be sheep.

06-10-2018

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Romy the Cat

Boston, MA
Posts 10,160
Joined on 05-28-2004

Post #:	40
Post ID:	24927
Reply to:	24926

Sorry, this was juts a fantasy on your part.

xandcg wrote:
I was thinking ESD drivers may have a true advantage over ALE/GOTO/Others (apparently they actually know how their drivers work) if that allow to someone design the horn exactly the way he/she want, and later order the driver with custom specs to match the horn.

I think it is a fallacy to think this way. There is absolutely no mystery to “design” a horn to meet a compression driver specifications, you do not need to know “how drivers work”. The reversed scenario is more complicated. Sorry, but I do not believe in custom specs compression drivers. Even if the money is not object and the makers have knowhow and desire to meet a custom specification then I do not feel that makers can meet any lucid truly custom specification. The makers do have a very limited set of criteria that they can manipulate and the resulting drivers sound as they sounds. That is it. If you need more second harmonics in upper range, more warmth at 300-600Hz, drop “color temperate” all over lower region, Ormandy/Philadelphia -like sound in midrange or more emphasized resonance at second high-pass octave then no makes would be able to accommodate it. They can theoretically tweak a sustention to give you another half octave at the bottom or change geometry of the phase plug to give you something at the tope but it will change the whole driver sound and there is absolutely no one who can surgically inflict to a compression driver any custom sound.

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

06-11-2018

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xandcg

Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #:	41
Post ID:	24930
Reply to:	24927

Part of development process.

They come out from "nothing" (even considering some eventual reverse engineering) with a set of 5 drivers supposedly to be sonically matching.

During the development process they certainly got all kind of sounds while prototyping and had to discover what each specific part of the driver does sound-wise to be able to match they all. If they documented the process (engineers usually do), they could tune characteristics on purpose to match some specific criteria.

Certainly there would have limitations, specially related with the limitations of the driver design, but with a fully documented development process they certainly can tune a lot of things with certain prediction of the resulting sound.

If they have the tooling it hard to believe the process would be really expensive with the unique logistics they have in China. Ever if they are using some very expensive custom alloy to build the drivers those are still metal and the discards can be fully and easily reused, that would not be free but far from expensive as buying all the thing again. In China this kind of arrangement can be made literally just knocking at the door of someone who is able to reuse the material.

Think for yourself, do not be sheep.

06-12-2018

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Paul S
San Diego, California, USA
Posts 2,658
Joined on 10-12-2006

Post #:	42
Post ID:	24931
Reply to:	24930

Pay To Play

One thing for certain, they will want serious money before they get into it with someone. And how many times "back and forth", tuning drivers to horns, each other, the amps, X/Os, and the room, does that include? I remember playing with other peoples' theater speakers, which had all been "tuned" by sound engineers, and feeling like it was hard to even know where to begin, even with "dedicated" amps! Sure, someone might do it; but who has already done it? Where are the examples? There are good, practical reasons why Romy's system plans have millions of hits. While there are certainly other ways to do it, it might take a while.

Best regards,
Paul S

06-14-2018

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Djjjj
Posts 13
Joined on 06-14-2018

Post #:	43
Post ID:	24932
Reply to:	24833

ESD relationship with Mr. Sam Saye and Dr. Bruce Edgar

Hey Romy, this is Jacky from ESD and I happened to find this site. I'm really glad that you guys are interested in our products, but there seems to be some misunderstanding about Sam and Bruce, so I just registered to clarify a bit.
Yes, Dr. Bruce Edgar and Mr. Sam Saye are part of our company. ESD was actually first registered in California where I learned with the two masters and we built the prototype together.

06-14-2018

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Djjjj
Posts 13
Joined on 06-14-2018

Post #:	44
Post ID:	24933
Reply to:	24932

Photo

Here's a photo.

06-14-2018

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Djjjj
Posts 13
Joined on 06-14-2018

Post #:	45
Post ID:	24934
Reply to:	24831

Invitation

Hey Josh I remember you~ It's Jacky. If you have time please come to our headquarter at China! Much better room acoustic assured.

06-14-2018

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Romy the Cat

Boston, MA
Posts 10,160
Joined on 05-28-2004

Post #:	46
Post ID:	24935
Reply to:	24933

Thank you.

Jacky, thank you for clarification. I have my view about Bruce and Sam being the “part of your company” and it will remind my view. I hope you will find the critiques expressed in this thread constrictive. It would be interesting to hear your commentary about what was expressed in this thread. Are you planning to sign up any dealers or reps at US’s East coast and make an East coast installation available?

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

06-14-2018

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Djjjj
Posts 13
Joined on 06-14-2018

Post #:	47
Post ID:	24936
Reply to:	24935

Reply

Yes, Romy, there are lots of very constructive ideas and I learnt a lot. We welcome all kinds of comments especially the negative ones to improve ourselves.In October and November we’ll attend Rocky Mountain and New York show. Hopefully see you there and let you listen to it.And yes we are looking for opportunities in the US market, getting touch with some people interested Smile

06-27-2018

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martinshorn
Germany
Posts 114
Joined on 04-14-2017

Post #:	48
Post ID:	24944
Reply to:	24936

Greetings

Hi Jacky! Nice that you show up in our rednex discussion Wink

I remember too. Thats a nice shot with E&S. Hope you got some response out of your show. Keep us updated about future changes. Would be very interesting whats going on behind the curtain reg. prototyping, finetuning etc. As I remember you had lot of R&D ongoing... KR, josh

12-01-2018

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xandcg

Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #:	49
Post ID:	25179
Reply to:	24944

ESD Acoustic, Huge Carbon Fiber Horn Loudspeakers, RMAF 2018

https://www.youtube.com/watch?v=7v-x1X0_Uyk

Think for yourself, do not be sheep.

12-01-2018

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Paul S
San Diego, California, USA
Posts 2,658
Joined on 10-12-2006

Post #:	50
Post ID:	25180
Reply to:	25179

As Usual

Well, here's another high-end speaker that's aimed at... well, who knows what they are thinking? Surely their choice of music/program says something about their aesthetics, also how and why they made the choices they did in developing these speakers?

Paul S

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