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Speaking of Karl-Heinz Fink

Wil

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May 8, 2020
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Doing an on-site search, very little has been said of Karl-Heinz Fink. Yet quoting, from 2008:
Karl-Heinz Fink, who's behind more speakers than you'd imagine for a wide range of well-known names.

So, let us speak of KHF and be conscious of current products he has had a hand in developing e.g.:
"His friend and fellow audio designer Karl-Heinz Fink was able to to step in and complete the work to a standard which both he and Rotel believe fulfills Ishiwata's vision of providing great audio at an affordable price.":

And:

Interview:
 

Wil

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May 8, 2020
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Interview from yesterday:

Excerpt:
"HP: Obviously great sound reproduction is a priority, but when engineering a new loudspeaker how do you approach the project?
KHF: Nowadays, a lot of the design can be simulated before we drill the first hole or switch on the soldering iron. Industrial design comes first, as this is a very important part of the product and the drive units will be constructed around it – not like in the old days, when existing drivers dictated the cabinet dimensions. In addition, the cabinet construction gets simulated to minimise cabinet vibration and after all that has been done, the speaker ends up in the anechoic chamber to start with the crossover. We try to get as far as possible with measurements before starting listening. Let me give you an example. Before we got deeply into the cabinet vibration problems, we often had bad results in the listening room when starting the voicing – even with the best drivers and a good crossover. It was the cabinet that often enough made our life complicated and we ended up voicing “around” those problems. Today, we simulate the cabinet, scan the final one with a laser vibrometer and so, there is no bad surprise in the listening room and we can concentrate on the final voicing and we have to make less compromises.

HP: Sonically, what are you looking for from a loudspeaker and do you rely on measurements or your ears when fine-tuning a loudspeaker?
KHF: Measurements are important, as they help…
"
 

Wil

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May 8, 2020
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He has his own range of high end speakers I believe, and as you say is often a consultant for others, such as Q Acoustics.
I wanted to be able to do proper ITU multi-channel SACD with 5 identical speakers… Settled on buying 3 sets of Concept 20 with matching stands:
DSC05630.JPG


For 2 channel listening I'm stacking 2 pairs in D'Appolito configuration—a goal since seeing Ken Ishiwata doing so in 2007:
Stacked Speakers KI.jpg

Notably, Tim de Paravicini too stacked… in 2017, using Falcon Loudspeakers' LS3/5a:
LS3:5a TdP.jpg
TdP LS3:5a.jpg
 
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Wil

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Q Acoustics.
I read your Post in that sibilant Thread… It's too busy there for me to want to leave a Comment and feel somewhat obliged to follow…

So I'll back you up by linking here a Q Acoustics blog piece, from 4 years ago:
"The amplifier is a power amplifier because (within its capabilities) it can provide all the current demanded of it by the loudspeakers and still maintain the same potential for current to flow at its red terminal. Note that this current is demanded or taken by the loudspeakers and NOT sent by the amplifier.

[And]
Conclusion
We have discovered that if your speakers have four binding posts then you may take advantage of the bi-wiring option and that you will need twice as much cable as before. We theorised and proved by measurement, the counter-intuitive notion that the high and low frequencies travel only in their designated cables. We have also shown by measurement that the theory that this would reduce intermodulation distortion caused by non-linearity in the speaker system is proven.




In light of the above evidence it would be sensible to conclude that where the opportunity exists and funds allow, bi-wiring should be explored as an option for improving the performance of any high fidelity loudspeaker system."


Well, KHF, he had said:
"Single wiring or biwire?
I’ve recently changed my mind. If you had asked me six months ago I would have said single wiring was better. I still believe it’s the best choice for speakers up to the middle-market price class. One good cable is better than two not-so-good cables. At the higher end, biwiring makes sense. We can now measure the effect."
 
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nopiano

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I'll back you up by linking here a Q Acoustics blog piece, from 4 years ago
Thanks, that’s what I read I’m sure! I remember posting the article in another forum, and a sceptic said something along the lines of:- Speaker cable company finds biwiring is beneficial!

The KHF point is good!
 
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newlash09

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Aug 28, 2015
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I wanted to be able to do proper ITU multi-channel SACD with 5 identical speakers… Settled on buying 3 sets of Concept 20 with matching stands:
View attachment 1646


For 2 channel listening I'm stacking 2 pairs in D'Appolito configuration—a goal since seeing Ken Ishiwata doing so in 2007:
View attachment 1647

Notably, Tim de Paravicini too stacked… in 2017, using Falcon Loudspeakers' LS3/5a:
View attachment 1648
View attachment 1649
I would be very interested to know, how the stacking experiment worked. I was thinking of placing 2 qacoustics concept center speakers in my HT, to increase center channel presence. But was warned against attempting it, due to lobing issues.

But I guess it can still be safely done, as I've seen another gentleman using stacked pairs of the older kef reference book shelves in an active system, running off dirac live correction.
 
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Wil

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May 8, 2020
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There are some family matters I'm attending to, so I can't really spare the time to write in detail.

I've tried 4 different amplification setups for stacked Concept 20:
DSC05633.JPG

At the moment, I'm quite enjoying powering them with a PM-15 (and SA7001 KI player).

If you stack Concept Centre, have the tweeters close i.e.:
stacked Concept Centre.jpg
 
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newlash09

Well-known member
Aug 28, 2015
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10,820
There are some family matters I'm attending to, so I can't really spare the time to write in detail.

I've tried 4 different amplification setups for stacked Concept 20:
View attachment 1810

At the moment, I'm quite enjoying powering them with a PM-15 (and SA7001 KI player).

If you stack Concept Centre, have the tweeters close i.e.:
View attachment 1811
Thanks for sharing. Placing the tweeters closer is a good idea :)
 
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