Jump to content
The Klipsch Audio Community
Sign in to follow this  
Wirrunna

Chief Bonehead on the AK6 K Horn

Recommended Posts

3 minutes ago, WMcD said:

Maybe they were thinking of a Patrician IV.  Smile.

 

WMcD

Interesting that Paul never tried (that I know) to one-up the Patrician. I did read a Dope from Hope where Paul wrote that if he went to more powerful drivers, deep nulls would show up in the response not to mention even bigger cabinets. PWK never understood (nor do I) why a home listener would not be content with a maximum output of 121 dB.

Share this post


Link to post
Share on other sites
7 hours ago, Kevin S said:

Is it possible that the 8ft. length refers to what the length of a straight horn would have to be to reproduce the lowest Khorn frequency, and not the actual length of the Khorn’s path? 

 

You know, that may very well be it. My old advertising copy is packed away somewhere, but I seem to recall mention in it of "32-foot wavelengths" (approximately 35 Hz). Though the nominal design cutoff of the Klipschorn is, IIRC, 40 Hz, it still manages useful output in the mid-30s.

  • Thanks 1

Share this post


Link to post
Share on other sites
2 hours ago, Islander said:

 

The answer is kind of Yes and No.  The LS bass horn is bifurcated for most of its length, but the two sides join at the mouth to become one big horn mouth, and that’s how the mouth size would be measured or calculated.  Its in-room performance is like that of a single large horn, with no lobing issues.  Therefore, the way it’s a single, non-bifurcated, horn at both its throat and mouth would make it, in effect, a single horn in every way that matters.

 

That was my point, actually, but it was getting late and I was using my phone (which gets rather tedious).

  • Like 1

Share this post


Link to post
Share on other sites
22 minutes ago, Edgar said:

 

You know, that may very well be it. My old advertising copy is packed away somewhere, but I seem to recall mention in it of "32-foot wavelengths" (approximately 35 Hz). Though the nominal design cutoff of the Klipschorn is, IIRC, 40 Hz, it still manages useful output in the mid-30s.

My recollection of my mid 80’s Khorns was a specified bandwidth of 32hz to 17khz, +/- 5db. It could have been 35hz though, my memory is not great.

Share this post


Link to post
Share on other sites
42 minutes ago, Kevin S said:

My recollection of my mid 80’s Khorns was a specified bandwidth of 32hz to 17khz, +/- 5db. It could have been 35hz though, my memory is not great.

 

Yes, that does look familiar. And if it is -3dB at 40 Hz, then it could easily be -5dB at 32 Hz.

  • Like 1

Share this post


Link to post
Share on other sites
15 hours ago, Schu said:

The LS isn't bifurcated...

 

Share this post


Link to post
Share on other sites

I thought I had seen the frequency response curves of bifurcated horns (Khorns) somewhere on this forum.

 

Bifurcated horns exhibit entire drop-outs, however minute, as opposed to peaks or troughs, in their response curves, do they not?

 

 

Share this post


Link to post
Share on other sites
57 minutes ago, geoff. said:

Bifurcated horns exhibit entire drop-outs, however minute, as opposed to peaks or troughs, in their response curves, do they not?

 

Not necessarily. It depends upon the wavelength, the distance between the apertures, the angle off-axis, and a few secondary factors.

https://www.quora.com/Can-we-perform-Youngs-double-slit-experiment-with-sound-waves

Share this post


Link to post
Share on other sites
1 hour ago, glens said:

It is bifurcated, it's also recombined.

 

It can still generate an interference pattern. See Young's double slit experiment reference above.

Share this post


Link to post
Share on other sites
4 minutes ago, Edgar said:

 

It can still generate an interference pattern. See Young's double slit experiment reference above.

 

Haven't yet read the link but have no problem believing the possibilities.  After all, two paths always creates problems in ways, whether they're combined internally or not.

Share this post


Link to post
Share on other sites

just noticed this new vid on the Klipschhorn.

 

 

  • Like 1

Share this post


Link to post
Share on other sites
8 hours ago, Edgar said:

 

Yes, that does look familiar. And if it is -3dB at 40 Hz, then it could easily be -5dB at 32 Hz.

 

Circa 1988 Klipschorn: + or - 3 dB 35 Hz--17.5 kHz; Current? non-AK6: + or - 4 dB 33 Hz--17 kHz. AK6: + or - 4 dB 33 Hz--20 kHz. 

 

Did quite a bit of looking thru old audio-type magazines from the '50s to modern times including Wireless World, Audio Engineering, Radio & TV News, Radio Electronics, etc. Couldn't find any mention of the unfolded length of the Klipschorn. This site is a treasure trove of old technology and it's searchable. There are some good articles on horn loudspeakers, just search each magazine or the entire library.

 https://www.americanradiohistory.com/index.htm

 

Lee

 

 

Audio-1965-10-OCR-Page-0077.pdf

Share this post


Link to post
Share on other sites

The Best of Audio Vol. IV  "Display until Feb. 23, 1990" says: (35-17k +/- 5) (orig. pub. 11/86)

 

"The low -frequency horn is substantially exponential in its expansion rate and thus would have an acoustic path length of about 8 feet if unfolded." 

 

I'll try to attach the PDF as I don't remember where to find the URL.

 

It's >10 MB.  I'll either pare it down or find the URL.  In a bit...

 

https://americanradiohistory.com/Archive-Audio/80s/Audio-Best-Of-Vol-IV.pdf

 

Share this post


Link to post
Share on other sites

Here's a copy of page one from the original 1986 November Audio with the text you cited. Wonder where Heyser got the "8 feet" information. PWK?

 

Some forum member has published the complete Heyser review in the past but I could post what I have.

 

Lee

Review page 1 of 6.pdf

Share this post


Link to post
Share on other sites

This is a lot of banter about a speaker that sounds good no matter who is right about the details. And it DOES sound good. So who cares about the fluff........

 

Shakey

  • Like 3

Share this post


Link to post
Share on other sites

If we go back to PWK's original paper on the Klipschorn (which is in my storage unit right now) , it looks to me like he set the taper rate not for the physical length of the horn as it is, but as it would be if it was a straight horn. In other words, for the horn "magnified" (my term) by the corner .

Share this post


Link to post
Share on other sites
On 4/27/2019 at 10:15 AM, Shiva said:

just noticed this new vid on the Klipschhorn.

 

 

 

That’s a nice description of how the cabinet has been improved, and the quality of the materials and the work that goes into it, but that’s all he discusses.  There’s nothing about any kind of improvements in the sound, nor anything about the drivers or crossover.  The grille cloth is pretty special, though.

Share this post


Link to post
Share on other sites
12 minutes ago, Islander said:

 

That’s a nice description of how the cabinet has been improved, and the quality of the materials and the work that goes into it, but that’s all he discusses.  There’s nothing about any kind of improvements in the sound, nor anything about the drivers or crossover.  The grille cloth is pretty special, though.

 

giphy.gif

 

  • Haha 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...