Can you help me identify this tweeter?

ianpengelly · 24th October 2006, 06:29 PM

I am trying to identify a pair of tweeters that I have. They were given to me in a box with a load of Vifa drivers when Rogers Speakers went out of business. They have the following on the back:

25 TK-R
H 875-60
Made in Norway

The numbering is similar to that of older Vifa tweeters, but I can't find any information on the website.

They appear to be carbon weeve and are approxmately 104mm across with a 25mm dome.

Thanks,

Ian

Jonathan Bright · 24th October 2006, 07:42 PM

The "H" followed by three digits suggest that it might well be a SEAS unit. That is a notation they use a lot. Secondly they may be an OEM unit that was custom made for Rogers and so doesn't turn up on their site because they wouldn't normally be sold retail. I guess our Scandinavian friends will crack it if your post is up when they're on line. Check time zones.

ianpengelly · 24th October 2006, 08:17 PM

Thanks Jonathan, hopefully they'll have an idea. They should only be an hour or two ahead of the UK.

Jonathan Bright · 24th October 2006, 11:46 PM

I got back from work and did some more thinking. I'm more confident now that it a SEAS unit. The HXXX is their prefered numbering system and of course they're Norwegian. I'm pretty sure the Vifa products are Danish aren't they?
It's good you've got a photo up. I'm willinng to bet that some one will see it and say that its a "something or other" and just like one of their's but with a different number. Now to save time I've gone to the SAES site and i can't find that number but if I'm right about it being OEM for Rogers then I wouldn't expect it to be there. You could always contact them directly and see what they say? You can bet that it'll be around 90bd/watt/mt in sensitivty and can be run safely from 3kHz with a 2nd order (or higher) cross over.

planet10 · 25th October 2006, 12:22 AM

Quote:

Originally posted by ianpengelly
25 TK-R
H 875-60
Made in Norway

No question it is a SEAS to my mind. Model = 25 TK-R (25 for 25mm, R may well be Rogers OEM) Made Aug 1975. Not many other speaker manufacturers in Norway. Is that information on a white oval sticker with a blue border?

dave

ianpengelly · 25th October 2006, 08:57 AM

Hi Dave,

I appreciate the input, but there appears to be a maufacturing date of 1997 on it, sorry I didn't mention it sooner, so I suspect that the 875 number is more likely the model. I can't imagine they were using carbon fibre in speakers in 1975!

Just looking at the pictures of some of the Vifa and Seas lines it does seem to be very similar in design.

I would like to mate them up to a pair of vifa 18cm mid-woofers, which thankfully have their label attached and their spec sheet is on the Vifa site. I'm not sure what size of cabinet to do yet, as it is just an experiment.

Thanks for all your help so far!

sreten · 25th October 2006, 10:20 AM

Hi,

Seas model number H875 is very consistent with introduced in 1996/7.

/sreten.

ianpengelly · 25th October 2006, 12:13 PM

I have just had a look through the list of vintage Seas drivers and it appears that the H875 is indeed likely to be the model number, but there is no information, nor can i find anything on google.

Looks like its an email to Seas!

Thanks for all your help,

Ian

24th October 2006, 07:42 PM	#2
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	The "H" followed by three digits suggest that it might well be a SEAS unit. That is a notation they use a lot. Secondly they may be an OEM unit that was custom made for Rogers and so doesn't turn up on their site because they wouldn't normally be sold retail. I guess our Scandinavian friends will crack it if your post is up when they're on line. Check time zones. __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.

24th October 2006, 11:46 PM	#4
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	I got back from work and did some more thinking. I'm more confident now that it a SEAS unit. The HXXX is their prefered numbering system and of course they're Norwegian. I'm pretty sure the Vifa products are Danish aren't they? It's good you've got a photo up. I'm willinng to bet that some one will see it and say that its a "something or other" and just like one of their's but with a different number. Now to save time I've gone to the SAES site and i can't find that number but if I'm right about it being OEM for Rogers then I wouldn't expect it to be there. You could always contact them directly and see what they say? You can bet that it'll be around 90bd/watt/mt in sensitivty and can be run safely from 3kHz with a 2nd order (or higher) cross over. __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.

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24th October 2006, 08:17 PM	#3
ianpengelly diyAudio Member Join Date: Oct 2006	Thanks Jonathan, hopefully they'll have an idea. They should only be an hour or two ahead of the UK.

25th October 2006, 08:57 AM	#6
ianpengelly diyAudio Member Join Date: Oct 2006	Hi Dave, I appreciate the input, but there appears to be a maufacturing date of 1997 on it, sorry I didn't mention it sooner, so I suspect that the 875 number is more likely the model. I can't imagine they were using carbon fibre in speakers in 1975! Just looking at the pictures of some of the Vifa and Seas lines it does seem to be very similar in design. I would like to mate them up to a pair of vifa 18cm mid-woofers, which thankfully have their label attached and their spec sheet is on the Vifa site. I'm not sure what size of cabinet to do yet, as it is just an experiment. Thanks for all your help so far!

25th October 2006, 10:20 AM	#7
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Seas model number H875 is very consistent with introduced in 1996/7. /sreten.

25th October 2006, 12:13 PM	#8
ianpengelly diyAudio Member Join Date: Oct 2006	I have just had a look through the list of vintage Seas drivers and it appears that the H875 is indeed likely to be the model number, but there is no information, nor can i find anything on google. Looks like its an email to Seas! Thanks for all your help, Ian

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