Any info on AKAI orthodynamic tweeter - diyAudio
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Old 7th May 2008, 01:27 PM   #1
diyAudio Member
Join Date: Mar 2004
Location: Budapest, Hungary
Default Any info on AKAI orthodynamic tweeter

I just bought a pair of AKAI orthydynamic tweeters out of curiousity. The type number is 4IT-SM3G, and 8 ohms is maked on them. Diameter 40 mm, height 11 mm. It seems they have a ferrite disc magnet at the back (no holes) and another at the front (with 8 holes). The spiral on the aluminium (or plastic with aluminium layer) diaphragm is visible throgh the holes. There is a fine wire mesh at the front. I suppose they should be better than dome tweeters. Has anybody got any information on this speaker? Which AKAI loudspeaker box are they used?
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Old 15th May 2008, 12:28 PM   #2
OzMikeH is offline OzMikeH  Australia
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Join Date: Mar 2007
sounds like a planar-magnetic design, Also called regular phase by foster. Relatively common in headphones as well.

Sorry I can't help you with Akai specific stuff.
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Old 15th May 2008, 12:42 PM   #3
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Join Date: Mar 2004
Location: Budapest, Hungary
Yes, I have two (and a half ) planar orthodynamic headphones. One of them, the Peerless has a very similar driver, except both the front and rear magnets are perforated.
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Old 16th May 2008, 12:07 AM   #4
Damosan is offline Damosan  Australia
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Join Date: Feb 2003
Location: Perth
Default Sounds like these

These sound like the ribbon tweeters sold by Apex Jr and others. Originally from Technics (or so I believe)

Apparently very good.
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Old 16th May 2008, 04:21 AM   #5
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Yes, these Akai are the same as the ApexJr ribbon (i assume from the description they are the same as the ones in a small set of Akais that i have -- quite a neat speaker, 4" midwoofer + a PR on the back)

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Old 22nd May 2008, 12:13 PM   #6
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They are the same as I hold in my hands, indeed! Thanks guys, good catch.
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