Kaltro drivers

Moondog55 · 26th August 2008, 01:55 AM

Having purchases my first full range driver the other week and being impressed with it ( magnavox 8inch ) I was wondering if any-one here had ever heard of this brand??

http://cgi.ebay.com.au/ws/eBayISAPI....MEWA:IT&ih=004

I googled and found nothing
regards Ted

Moondog55 · 27th August 2008, 11:28 AM

SWMBO is mad at me but I bought them as an experiment
If any-one has any information on I'd be happy, when I "Googled" I found only one reference and that was for an old science experiment in Psycho-acoustics some time back.

Moondog55 · 1st September 2008, 06:49 AM

OK guys and gals; the drivers just arrived in the mail and I have hooked them up and I've been listening to Wendy Matthews "Cafe Naturale" for the last half hour.
I am impressed; to listen and be enthralled by a naked driver sitting on a blanket on the floor is something new for me.

Massive magnet for a 1inch voice coil, 20mm thick; 100mm dia; front plate 6mm thick.
It'snominally an 8 inch/200mm driver but cone is 150mm, inverted cloth surround, whizzer cone is 50mm and a hard dome in the centre of the whizzer.
If there is any-one in the Northern sudurbs of Melbourne who could help me measure the T/S parametes of this driver I'd be grateful for the help, but at 1metre SPL peaked at 114 dB with an average SPL of 91, and it's rated 15 watts.
Not much bass though so it needs augmentation.
I have heard a friends Coral 10's and these sound better on a blanket than his in a baffle.
This makes up for ruining the Magnavox 8WR's.

Moondog55 · 2nd September 2008, 12:26 PM

OK I've uploaded some pix to Flickr, if any-one recognised these drivers or can give me any idea of where to find the info gratitude and cold beer flows.

http://www.flickr.com/photos/25510659@N07/2820646347/

http://www.flickr.com/photos/2551065...n/photostream/

http://www.flickr.com/photos/2551065...n/photostream/

http://www.flickr.com/photos/2551065...n/photostream/

http://www.flickr.com/photos/2551065...n/photostream/

http://www.flickr.com/photos/2551065...n/photostream/

http://www.flickr.com/photos/2551065...n/photostream/

In all of the experienced people here I'm hoping some-one can help me with this drivers provenance and perhaps comment on performance and best use

Moondog55 · 3rd September 2008, 07:39 AM

Guess what? I tried a google search just now; and now the only link and reference to these drivers is this post.

Makes you wonder how many manufacturers go out with out notice or leaving a mark on history, as in my opinion these are good drivers, especially as the only other references I found dated to the mid/late 70's.

Moondog55 · 8th September 2008, 05:05 AM

I'm bumping this hoping some-one will remember something about this old driver and it's provenance.

I have even contacted the Japanese embassy but no reply from thee ( as yet )

planet10 · 8th September 2008, 05:51 AM

Definitely an OEM by one of the majors? 8"?

I've had a stream of 6 1/2" that gave a very close resemblance to these. They were from a number of runs and from the differing baskets -- from the front they all look the same -- alsmost everyone got a chance to build them

from the baskets & the connections my best guess would be that these were OEMed by National/Panaxonic.

The 6 1/2s were pretty special, these look to be a level more serious build.

FE167 phase plugs should fit them :^)

dave

Moondog55 · 8th September 2008, 06:23 AM

These have convinced me to get organised enough to obtain some measuring gear.
All I can say is they are 1 or 2 notches above OK, if not as good as the big Coral Beta, at least as good as the flat 8.

I guess the only thing I can do is keep looking and find a set of test gear, thanks for reply.

I am going to use these in a biggish open baffle, BIG, simple and very low WAF
Regards Ted

wednesdaysouth · 16th May 2009, 07:08 AM

Hi Ted,

I found a single one of these on the side of road and now I'm looking for its mate. I just wondered if you had figured out any of the vital statistics for it?

Cheers,
Jem

Moondog55 · 16th May 2009, 08:06 AM

No, but be very careful about power handling, I was listening to these OB when playing some jazz and i have severely over-driven one of them, now poling severely.

The pair cost me $55- plus postage on Ebay, happy to sell them on to you, make me an offer for the pair.

They are a good sounding driver and very efficient, stated maximum power handling is accurate ( my fault )

Recently some of the 51/4 inch versions sold on ebay for about $8- each, seller had 8 of them

26th August 2008, 01:55 AM	#1
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Kaltro drivers Having purchases my first full range driver the other week and being impressed with it ( magnavox 8inch ) I was wondering if any-one here had ever heard of this brand?? http://cgi.ebay.com.au/ws/eBayISAPI....MEWA:IT&ih=004 I googled and found nothing regards Ted __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

27th August 2008, 11:28 AM	#2
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	SWMBO is mad at me but I bought them as an experiment If any-one has any information on I'd be happy, when I "Googled" I found only one reference and that was for an old science experiment in Psycho-acoustics some time back. __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

1st September 2008, 06:49 AM	#3
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	OK guys and gals; the drivers just arrived in the mail and I have hooked them up and I've been listening to Wendy Matthews "Cafe Naturale" for the last half hour. I am impressed; to listen and be enthralled by a naked driver sitting on a blanket on the floor is something new for me. Massive magnet for a 1inch voice coil, 20mm thick; 100mm dia; front plate 6mm thick. It'snominally an 8 inch/200mm driver but cone is 150mm, inverted cloth surround, whizzer cone is 50mm and a hard dome in the centre of the whizzer. If there is any-one in the Northern sudurbs of Melbourne who could help me measure the T/S parametes of this driver I'd be grateful for the help, but at 1metre SPL peaked at 114 dB with an average SPL of 91, and it's rated 15 watts. Not much bass though so it needs augmentation. I have heard a friends Coral 10's and these sound better on a blanket than his in a baffle. This makes up for ruining the Magnavox 8WR's. __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

2nd September 2008, 12:26 PM	#4
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	OK I've uploaded some pix to Flickr, if any-one recognised these drivers or can give me any idea of where to find the info gratitude and cold beer flows. http://www.flickr.com/photos/25510659@N07/2820646347/ http://www.flickr.com/photos/2551065...n/photostream/ http://www.flickr.com/photos/2551065...n/photostream/ http://www.flickr.com/photos/2551065...n/photostream/ http://www.flickr.com/photos/2551065...n/photostream/ http://www.flickr.com/photos/2551065...n/photostream/ http://www.flickr.com/photos/2551065...n/photostream/ In all of the experienced people here I'm hoping some-one can help me with this drivers provenance and perhaps comment on performance and best use __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

3rd September 2008, 07:39 AM	#5
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Google????? Guess what? I tried a google search just now; and now the only link and reference to these drivers is this post. Makes you wonder how many manufacturers go out with out notice or leaving a mark on history, as in my opinion these are good drivers, especially as the only other references I found dated to the mid/late 70's. __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"


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8th September 2008, 05:05 AM	#6
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	BUMP!! I'm bumping this hoping some-one will remember something about this old driver and it's provenance. I have even contacted the Japanese embassy but no reply from thee ( as yet ) __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

8th September 2008, 05:51 AM	#7
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Definitely an OEM by one of the majors? 8"? I've had a stream of 6 1/2" that gave a very close resemblance to these. They were from a number of runs and from the differing baskets -- from the front they all look the same -- alsmost everyone got a chance to build them from the baskets & the connections my best guess would be that these were OEMed by National/Panaxonic. The 6 1/2s were pretty special, these look to be a level more serious build. FE167 phase plugs should fit them :^) dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

8th September 2008, 06:23 AM	#8
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	These have convinced me to get organised enough to obtain some measuring gear. All I can say is they are 1 or 2 notches above OK, if not as good as the big Coral Beta, at least as good as the flat 8. I guess the only thing I can do is keep looking and find a set of test gear, thanks for reply. I am going to use these in a biggish open baffle, BIG, simple and very low WAF Regards Ted __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

16th May 2009, 07:08 AM	#9
wednesdaysouth diyAudio Member Join Date: May 2009	Hi Ted, I found a single one of these on the side of road and now I'm looking for its mate. I just wondered if you had figured out any of the vital statistics for it? Cheers, Jem

16th May 2009, 08:06 AM	#10
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	No, but be very careful about power handling, I was listening to these OB when playing some jazz and i have severely over-driven one of them, now poling severely. The pair cost me $55- plus postage on Ebay, happy to sell them on to you, make me an offer for the pair. They are a good sounding driver and very efficient, stated maximum power handling is accurate ( my fault ) Recently some of the 51/4 inch versions sold on ebay for about $8- each, seller had 8 of them __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

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