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Jensen H222

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Posted on October 2, 2016 at 06:52:39
gberchin
Audiophile

Posts: 33
Joined: January 12, 2008
 Just inherited a pristine Jensen H222 coax from my father. I always liked the sound of this driver, so I'm planning to build a new enclosure for it. I have searched all over the Internet but have not found any Thiele/Small parameters. I do not have the facilities to measure them myself. Anybody have any info?

Thanks.

 

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RE: Jensen H222, posted on October 2, 2016 at 10:05:42
Kloss
 Your driver was built before T/S work in the late 60s-70s and it would work best in a large vented cabinet or a back-loaded horn like a imperial.

 

RE: Jensen H222, posted on October 2, 2016 at 10:20:37
gberchin
Audiophile

Posts: 33
Joined: January 12, 2008
 Yes, thank you; I was aware of that. It would still be handy to have the T/S parameters so that I don't have to design the dark.

It was originaly in an ~7 cubic foot K-109 Jensen vented enclosure, which I really didn't like. I've been thinking about perhaps an open baffle.

 

RE: Jensen H222, posted on October 2, 2016 at 14:24:11
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 wish I did have its parameters - I've seen them stuffed into the little Karlson 12. I have some old beat Heath Ultraflex which think are similar in size to Ultraflex 12 and a nice size.

I get the notion that qts may be on the high side - in that case you may have better results from an open baffle

There's the Ultraflex 12 Enclosure Plan Here in this PDF


here's H222 in the classic Karlson K15 - again if its motor isn't strong then you won't get the powerful attack of a speaker with lower qts - mids can be good

I've run a P-Audio 15" coax with qts ~0.38 on small open baffle and was satisfied with the "bass"



Karlson Evangelist

 

RE: Jensen H222, posted on October 2, 2016 at 15:54:04
gberchin
Audiophile

Posts: 33
Joined: January 12, 2008
 Yes, a high Qts was my concern. The modern Jensen replica "vintage" P12 drivers are in the 0.7-0.8 range for Qts, which supports the OB idea. But I don't know how similar they are to their 1958 counterparts, or to the H222.

Interestingly, I found a paper copy of that same Jensen publication among my father's stuff.

Thanks,
Greg

 

RE: Jensen H222, posted on October 11, 2016 at 17:57:35
Wojciech
Audiophile

Posts: 4129
Joined: June 23, 2009
 I think if I remember correctly jensen coax also has the Qts in 0.7- 0.8 rangr and FS ~60 hz. They probably would do fine in OB with 15" woofer

 

RE: Jensen H222, posted on October 11, 2016 at 18:08:47
gberchin
Audiophile

Posts: 33
Joined: January 12, 2008
 The little bit of info that I've been able to find on the Internet tends to support your memory. I'm thinking, though, that I will just have to measure the parameters myself. I don't have the equipment to do that right now, but it's not like it's hard to get. If I ever do, I'll put my measurements out for everybody to see.

 

RE: Jensen H222, posted on October 11, 2016 at 18:45:58
Wojciech
Audiophile

Posts: 4129
Joined: June 23, 2009
 I have the woofer tester and measured the drivers. Unfortunately my hard drive crashed and I have no access to test results and drivers are in the storage under the pile of other ...drivers .Maybe in a few weeks I would be able to measure them but no earlier .
Sincerely , W

 

RE: Jensen H222, posted on May 3, 2019 at 12:58:44
gberchin
Audiophile

Posts: 33
Joined: January 12, 2008



Sorry to resurrect such an old thread, but I finally got around to measuring T/S parameters for my Jensen H222. Markings on the driver are: 220643 ST 875 H222 C6015 2. This is only one example of a 63-year-old driver, so it may not be representative. See attached image.

 

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