KLH speaker drivers?

[dynaco_dan]

Hi there;

Does any member know of the different tweeters, mids or woofers used in the older classic KLH speaker enclosures?

I have seen the KLH Six, Five and Twelve tweeters and they look identical from the front.

Is there 4 ohms, 8 ohms and 16 ohms versions?

Another, similar looking tweeter has fibreglas inside the front screen on smaller models.

The Five mid, Twelve mid and fullrange extension speaker are the same driver or is it?

The Five and Twelve have 2 mids each, so that they would need to be either 4 ohms in series or 16 ohms in parallel?

There is 10" woofers in the KLH Six and others?

The KLH 12 has a 12" woofer?

In the KLH library there is an index of KLH speakers and electronics.

Does anyone here have the knowledge to do an index on the different speaker drivers for each speaker system?

Another thought just came to mind, can anyone index the crossover parts of each speaker system?

A lot of questions for the new year.

All the very best to you and yours in 2006 to all members.

[Carlspeak]

There already is a KLH speaker index that includes drivers and impedences for some of the various models. I can't vouch for its accuracy, however,

http://www.arsenal.net/speakers/klh/KLHmodels

was the URL in July of 2002.

This may not longer be active due to the web site's name change. If this doesn't work go to the site's KLH area. It's there.

Carl

Carl's Custom Loudspeakers

[dynaco_dan]

>There already is a KLH speaker index that includes drivers

>and impedences for some of the various models. I can't vouch

>for its accuracy, however,

>

>http://www.arsenal.net/speakers/klh/KLHmodels

>was the URL in July of 2002.

>This may not longer be active due to the web site's name

>change. If this doesn't work go to the site's KLH area. It's

>there.

>

>Carl

>Carl's Custom Loudspeakers

Thank you Carl; Nice moustache

The speaker index in the library is not what I would like, thank you.

A speaker driver index is more precisely what I would like to see.

An actual list of the various woofers, mids and tweeters and which speakers they were used in for example, using part numbers.

From my old eyes I see what appears on the surface to be, the same tweeter used in the models 5, 6, 12, and 17.

Other models appear to use the same tweeter as well.

At least one comes to mind, with fibrelglas under the screen.

The KLH 17 woofer is 10" and so is the 6, are they the same?

Is there any lists that anyone knows of that might separate these?

The full range extention speaker appears to be also the KLH 5 and 12 mid range.

The 5 is 8 ohms?

If true then 2 x 16 ohms mids?

The 12 is 4 or 8 ohms?

If true then 2 x ? ohms mids?

From a front view KLH did not seem too use a large variety of drivers, am I wrong?

Has anyone read anything regarding how KLH arrived at designing the KLH 12 crossover, externlly rather than the traditional internal mounting?

I am much more familiar with AR and their individual drivers and impedances.

Thank you.

[mrdb]

According to some service notes that a friend of mine has (he used to service KLH in addition to many other brands) the Twelve and the Five had the same midranges and tweeters, but different woofers. The Seventeen used the Six tweeter; the Twenty was a 4-ohm version of the Seventeen; the Twenty-Three used the Five woofer and tweeter; and the Thirty-Three used the Seventeen woofer and the Six tweeter.

Evidently,the serial number changeover from the molded-in drivers in the Six to the bolted-in ones occurred at 93000. No part numbers listed.

Also, see my Five factory schematic at reply #518. The midranges are connected in series with each other and with a 15-ohm resistor: my hunch is that the mids are much more efficient than the other drivers, and the higher impedance allows the use of smaller inductors and caps. Note, too, that the woofer has inverted electrical polarity relative to the mids and tweeter and has a Zobel network in parallel to flatten its impedance rise.

Bob

[dynaco_dan]

>According to some service notes that a friend of mine has (he

>used to service KLH in addition to many other brands) the

>Twelve and the Five had the same midranges and tweeters, but

>different woofers. The Seventeen used the Six tweeter; the

>Twenty was a 4-ohm version of the Seventeen; the Twenty-Three

>used the Five woofer and tweeter; and the Thirty-Three used

>the Seventeen woofer and the Six tweeter.

>Evidently,the serial number changeover from the molded-in

>drivers in the Six to the bolted-in ones occurred at 93000. No

>part numbers listed.

>Also, see my Five factory schematic at reply #518. The

>midranges are connected in series with each other and with a

>15-ohm resistor: my hunch is that the mids are much more

>efficient than the other drivers, and the higher impedance

>allows the use of smaller inductors and caps. Note, too, that

>the woofer has inverted electrical polarity relative to the

>mids and tweeter and has a Zobel network in parallel to

>flatten its impedance rise.

>

>Bob

Thank you very much Bob;

You and your friend are a wealth of information about KLH, thank you for this help.

[dynaco_dan]

>>According to some service notes that a friend of mine has

>(he

>>used to service KLH in addition to many other brands) the

>>Twelve and the Five had the same midranges and tweeters, but

>>different woofers. The Seventeen used the Six tweeter; the

>>Twenty was a 4-ohm version of the Seventeen; the

>Twenty-Three

>>used the Five woofer and tweeter; and the Thirty-Three used

>>the Seventeen woofer and the Six tweeter.

>>Evidently,the serial number changeover from the molded-in

>>drivers in the Six to the bolted-in ones occurred at 93000.

>No

>>part numbers listed.

>>Also, see my Five factory schematic at reply #518. The

>>midranges are connected in series with each other and with a

>>15-ohm resistor: my hunch is that the mids are much more

>>efficient than the other drivers, and the higher impedance

>>allows the use of smaller inductors and caps. Note, too,

>that

>>the woofer has inverted electrical polarity relative to the

>>mids and tweeter and has a Zobel network in parallel to

>>flatten its impedance rise.

>>

>>Bob

>

>

>Thank you very much Bob;

>

>You and your friend are a wealth of information about KLH,

>thank you for this help.

Hi again, Bob;

Would your friend be willing to join and share his notes with our website?

First hand KLH service or factory workers, have memories and experiences, that we don't have, and it sure would be nice to hear from them.

Thank you again, Bob.

[Andy]

The only thing I might be able to add is that the model six had a larger magnet and longer suspension travel then the 17 & 20. I'm surprised to see they made that many epoxy sealed drivers (model 6 up to about 1963-64 ?). Kloss got a U.S. Patent on this system, but I don't think anyone wanted to copy a non-servicable speaker enclosure..... short of taking a crow bar to the cabinet!

[mrdb]

To be accurate, my friend's notes said "below 93000-back to factory", which I can only assume means molded-in drivers.

Bob