KT88

I think that's a good idea. I would additionally offer a similar amp in the same Metropolis movie like cabinet but without electronic crossover...for all lovers of Cornwall, Heresy, LaScala and Klipschorns from today's production. I bet there will be buyers if the price is adequate but doesn't shoot into unaffordable spheres, maybe a few $K might be attractive. No one would have to ask if these amps would be a good match for Klipsch Heritage speakers.

Oh, the 935 was the racing version without torpedo front fender? A very rare car. Yeah, what do they call that in Germany.... I would say he is a „widerliches Schwein, ein Betrüger und ein großes Arschloch, and he should be glad you are far away. I hope if the engine doesn't come to you that you will at least get your money back. Yes such negative people with a lot of criminal energy exist all over the world. And yet...where does the world go when you no longer trust anyone? There would be hardly any business and communication possible. Unfortunately, it catches you at some point. I have also paid my dues. In 2011 I wanted to buy physical gold and I was naive as otherwise rarely. The company had been advertising in the major newspapers for years and was very well known. Unfortunately, I was one of the first customers to fall victim to this scammer's pyramid scheme. I only had to google once before buying and I would have read the new warnings. Ok, the amount of money in your Porsche engine for the parts or in the gold bar have been in other dimensions than at CBH but it is unfortunately the same bad morals. By the way, a reputable company, although not quite cheap is this one: At our place in the Eifel directly at the Nürburgring (green hell race track), only 45 miles from Cologne. They also do vintage engines or are you talking the 2018 335? https://www.manthey-racing.de/en/home

I am not directly affected but having read some very eloquent technical threads where CBM had contributed with obvious expertise I am more than shocked at his behaviour. Until then I thought that someone with such a wealth of knowledge and so involved in this forum couldn't be a bad person. I also had a couple of PMs with CBH where he had helped me with electronics questions. To put it generally, my guess is, but you can correct me, that in the US the offence of fraud results in a very high level of contempt. Of course, fraud is a major and sordid offence anywhere in the world. But when I, as a foreigner, look at your US American history, then a horse cheat, for example, must have been one of the worst types at the time of the Wild West...he accepted the possibility of the bruised horse buyers dying of thirst while riding through the desert. Another example, in the US, manufacturers of goods are trusted first (at least to some degree as far as I've heard). But if something turns out to be a malicious fraud then the reputation of such a company is ruined for a long time if not forever. Take the example of the VW diesel scandal. As a German, I was ashamed of it. In Germany, more tests have to be passed before a car is allowed on the market, for example. With you, it is all the more dramatic when a fraud is discovered later. It was probably similar with the Boeing 737 MAX. I don't want to judge which system is better, that of the greater prior control or that of the later better monitoring like yours. What I want to say is that I have the impression that the quality of trust has a very high value in your society. Therefore, CBH's behaviour is incomprehensible to me, or perhaps even a little pathological. Social exchange (in forums), recognition, need for recognition and, as Travis said, combined with too full-bodied promises that in the end lead to total overload, unfair withdrawal and immersion. The bad thing is when CBH continues obsessively under almost identical names without a break elsewhere in forums as if nothing bad had happened in the Klipsch forum. I see this as a disgusting provocation or even as partially very neurotic.

„informed me“ is funny😀

That may explain a bit why I like my Alnico K77 more than spare K77M connected to my AA LaScala.

There is no compression driver without a phase plug so far I know. But the K691 will not have the additional phase plug which Roy has constructed to guide the HF better regarding the K402 because it must be specifically calculated for each different driver. This has happened until now only for the use of the Celestion driver.

To get back to the topic of this thread...because, for other brands and comparisons, another thread should be opened in my view...Most of the time, discussions like this end up in silly cantankerousness and in the end, the thread is shot. Here below in the link is a video where you can listen to UJ vs KJH comparatively. For copyright reasons from minute 29:30. But I think that the conversation between the two is just as informative as the listening. Of course, the video cannot convey the real sound impression of hearing it yourself. In addition, the speakers are positioned very differently. Therefore, don't take it too seriously. But the mix of conversation and a certain sound impression makes it a good and entertaining video in my opinion.

As far as I know, it is about replacing the internal switching power supply with a linear power supply, like this offer from Poland. The link is concerning the 2021 Node but they have also offers for the older models. https://pd-cf.com/produkt/bluesound-node-2021-upgrade-low-noise-psu-interface/

@Flevoman I mentioned this because we are in an American forum and there Quad is a rare exotic. But a lot of used units are in the market in Holland and Belgium, also to Italy. I bought Quad gear from Italy, the Netherlands and Gent. All very nice people. In Germany, the used prices for Quad equipment are sometimes 30% to 40% higher than in your country. UK is completely out as a used market because of the Brexit with enormous customs, tax and shipping prices (VAT comes on top after customs and shipping). If you are really interested in trying out an attractive alternative for little money, look also here: hifishark.com It is a meta search engine for the whole world, where also every "Marktplaats" ad appears. But also Ebay small regional ads and all small and large hifi ad sites. About your photos, it should sound very good in your room. I do not want to impose myself, but just try it once with less angled speakers so that you can still see the inside well. I would start with half the angle between parallel and to your head, then just play with subtle nuances in and out. Also, I personally don't think you need to move them that far away from the speaker wall. I also would place them a small tad narrower on their line. Trying out is just part of the game. As I said before sometimes little changes can make them shine. Just my two cents.

I just want to add my two cents and not interfere. Just as a little idea because you live in Holland. I am using an old Quad 306 power amp after 20 years of Mcintosh C22CE with MC275MK4 and I must say that I am overwhelmed how good it is. (I put in new electrolytic caps). Actually I just wanted to try it out for fun because I had it 35 years ago....and it has been my daily amp since February 2022 so much I like it (but the mcintosh stay too). Now the 306 had a big brother I'm considering buying, the Quad 606 (better the Mk2 version). Exactly the same circuit but more steam, 2x 140 watt at 8 ohm. There are often good deals in Holland for about 450€. I know that you can afford more expensive equipment Flevoman but it was just an idea...so good it sounds. http://www.hi-fi-insight.com/quad-606-power-amplifier.html

@Flevoman how many watts delivers your Melody MDA2 (2A3 tubes) amp? Not to open a new and different discussion but I can say from experience that a fully horn loaded system like the Khorn can sing with such a low powered ( I assume) amp. If I compare my 245 litres Tannoy bass reflex cabinet with your CW4 they have in common that they have good sensitivity. But both speakers need high current to control the bass. Tannoy recommends minimum 50 watts, better 100 or 150 watts. We had other threads here with the same topic regarding the CW4. Adding to this respect that you have a huge listening room I would start to try another power amp which your dealer could borrow you.

Welcome to the Forum, Domenico, congrats to your vintage Khorns, you have a very nice system and your gear as you describe it must sound very good together with the Khorns in your lovely room.

May be it is my browser, I don‘t see the pic.

Agree with all posts. What is this little black box above the yellow 5 uF Mylar cap?

I forgot one more point, the best and spatially accurate speakers cannot sound good in this respect if they are not the same distance from your ears. I measure the distance from the wall to the speaker exactly, with a laser or a tape measure, so the inner distance and the outer distance which is further away by the angle. This sounds pedantic but it really helps.

Flevomann, my contribution is about the spatiality of listening, less about the volume of the bass. First of all, when the speaker is moved a bit away from the wall, it often sounds often more spatial, the sound can "breathe" better. But, for example, my Lascala are so deep themselves that they are against the wall. I would just experiment it where it sounds best within your margin. As for bass fullness, sometimes moving one of the speakers a few inches to the left or right on the wall works wonders. Just give it a try. Your room has a different resonance at each point and the effect is sometimes impressive. You can try with both speakers to move them a little to the left or right. I don't mean away from the wall or closer to the wall, just move them a little on the line, just a few cm. i don't know the CW4 but with other speakers, especially LaScalas but also big Tannoys and small LS3/5a i have learned the following effect concerning holography, imaging and soundstage. I don't angle the speakers as much as you do. With the Lascala, I can clearly see the inner sidewall from my listening position when I have the best effect for the stage. If the speakers are angled in too little (or even completely parallel), the stage becomes too wide and lose and two dimensional, like a line from left to right. But if I angle in so much that I only see the front of the speakers, it is no longer spatial, but everything overlaps which can be confusing and it allows not so good the listening of the placement of instruments. Just try to position both speakers in a way that you can still see the inner side wall and experiment with angling in a bit more or angling out a bit more. Sometimes it is good to listen to a position for a few hours, sometimes you know immediately when it is wrong or right. If you have found the right angle then try again to move the speakers closer to the wall or further away, we are talking just cm but you can try the extrem points of your scope at first. and then try the possibilities in between..

Prof. Sengspiel was a sound engineer and audio engineer. He passed away a few years ago and his heirs have fortunately decided to keep his website online, also in English. One of the best collections for most calculations and explanations in audio. http://www.sengpielaudio.com/Calculations03.htm Maybe good enough and helpful enough to be pinned permanently.

Thanks for posting, it looks great. Aside of measurements etc. what is your first impression re the bass performance? Is it perhaps more articulated in the upper bass region, but is it also with the same „feel“ of body even if it is lifted from the floor? or even more so? My first thought was it could sound a tad less „grounded“?

Ok, I admit that the definition of Oxford can be found repeatedly. https://en.m.wikipedia.org/wiki/High_German_languages I did not know that. Our current accent-free High German has its origins in Lower Saxony.

In principle, the Oxford definition is correct with the influence of Luther's Bible translation. But what is definitely not correct is the origin of High German that is given there. This must be a confusion of the meaning of the word "high". But in reality it has nothing to do with high landscapes or mountains. And because we have high mountains only in the south it is consequently a wrong localization. The real High German is spoken in Hanover, which is the capital of Lower Saxony, and that is flat lowland pretty much in the north. High German means that it is spoken at a "high" level understandable to all.

Dean, is it this town? The only one I have found via google maps with the name Speicher. Speicher https://maps.app.goo.gl/3Pm2z8aWqTb6MngV9?g_st=ic Which Opa did not like the Platt, the German or the US Opa? The German Opa may be was from another region by origin? Or the US Opa had bad memories from war time in Germany? „High German“ I did not know this expression in English. But in fact it is a one-to-one translation of the German word "Hochdeutsch". And so it is also used in English as I googled. It means a dialect free language. Before mechanization, no one from Bavaria would have been able to talk to someone from Hamburg or Cologne, the very different dialects are a symptom of centuries of small-scale statehood. Everywhere small princes with their compatriots. In addition, there was a rather strict separation of Catholic and Protestant areas with peculiarities of language, further on animosities e.g. between Swabians and Badeners or between Rhinelanders and Prussians. It was not until the middle of the 19th century that there were national movements striving for unification. Until the beginning of the 20th century, Bavaria was still against it. Only with the invention of the radio the language became more uniform. The radio broadcasts came in High German, which was then learned in each region. But the Platt, i.e. the dialects, were cultivated for a very long time because it also strengthened the regional identity and does it still today (then most are able to speak also High German. I like that every region has its own sound. That can be quite different here within 120 km, in the U.S. you have to drive from New York to Ohio.

I did not know you had Grundig gear in the States?

This is the joke of history. We talk about the cheapest caps and in a few years no one builds them anymore. In the 1960s and 70s in Germany in every kitchen radio and TV set were Telefunken ECC83 tubes (12AX7 for you). At that time price in today's money maybe 2 USD. Today 500 USD NOS.

I thought you were American, so you are in Canada or Mexiko? May be a tank full of gas were cheaper than shipping?

geoff. that is an impressive description of how you can not improve something good as long as the parts work, and how quickly you run the risk of replacing something that no longer works well but was right by something wrong if you are not careful. The problem is that from the old vintage speakers many of the Aerovox caps are gone and therefore the users don't have a benchmark in mind anymore. So they have the choice of either believing what Klipsch recommends today or believing more expensive replacements could only be better.