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Multi-Way Conventional loudspeakers with crossovers

3D printed K-Tube for 1" compression drivers
3D printed K-Tube for 1" compression drivers
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Old 28th June 2020, 10:12 PM   #91
HIU is offline HIU  United States
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Location: Charlotte, NC
Picked them up yesterday. As well as several JBL 4675 and EV XEQ 504 Cinema LCR speakers. Donít know when Iíll have a listen. Did open one up and took some photos before putting them in climate controlled storage. Sorry I didnít have my micrometer calibers handy for measurements.

Here is what I found:
15Ē Eminence (OEM) Speaker
151371
1997
8 ohm
G1

Eminence Tweeter
02093
1997
8 ohm
G2

EV DH1A Compression driver
81256
1997
8 ohm

Tried several times to upload photos, but not working on this end. Will try again later.
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Old 30th June 2020, 09:05 AM   #92
freddi is offline freddi  United States
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3D printed K-Tube for 1" compression drivers
the larger klam lens w. DH1A is intriguing - AW must had thought it did something useful. (-not heard that driver - the factory diaphragm goes for $229)
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Old 1st July 2020, 05:37 PM   #93
HIU is offline HIU  United States
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Default Acoustic Reality, Inc. Model WB 15

Photo upload worked this time.
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Old 4th July 2020, 07:29 AM   #94
freddi is offline freddi  United States
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3D printed K-Tube for 1" compression drivers
very interesting - other than the lack of a K-front aperture, its built very close to John Karlson's X15 cabinet -but more like Fig.6 in proportions per Karlson's final "Acoustic Transducers" patent. Does it show any signs of once having an aperture up front?

It appears maybe the small mini-klam could fit in the central rectangular slot. -- On either side of that central hole are de-Q-ing vents as Karlson often used with X15. Likely that hole was also part of the vent as it appears there are terminals above the crossover which could feed either of those klam lens HF units.

You could add cleats to the front and rear parameter and add a K aperture plus do some bracing. Perhaps the Eminence woofer
Alan used sounded better sans K-aperture - ?

If you get time, it would be nice to have the outside dims plus enough inside dims to describe the baffle and 3 panel reflector

Where there any notes or verbal lore passed down with these speakers ?

Last edited by freddi; 4th July 2020 at 07:48 AM.
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Old Today, 12:58 AM   #95
freddi is offline freddi  United States
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3D printed K-Tube for 1" compression drivers
Karlson's X15 speaker (introduced in 1965) often but not always used a distributed vent system and the late Martin Poppe (who wrote the "K-Coupler" paper as a thesis at MIT) said Alan worked along side with Karlson in later years, so it looks like Alan absorbed some of John Karlson's ways of dealing with hings.

Johny Holiday's X15 central vent flanked by de-Q-ing holes. I believe there were 8-0.75" holes on this cabinet with one out of view on the top reflector panel.
Click the image to open in full size.

My X15's vent system
Click the image to open in full size.


One X15 seen on Ebay with single large vent and upfiring horn - I think this one
would be the direct precursor to Transylvania Power Company's cabinet and others such
as Ernst Beck's BEC, Acoustic Control's 115Bk/BC2, KK-Audio, Westwood and another company
who all pretty much simultaneously introduced the same cabinet.
Click the image to open in full size.
 

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