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Old 7th March 2014, 02:20 AM   #1
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Default whatever happened to the ICT?

Once upon a time, when International Jensen was a "real" company, they came up with (actually bought out I think) the ICT. That stood for "Inductively Coupled Transducer"-a kind of metal whizzer cone, but not attached to the main cone, but extending down into the voice coil area. Or maybe attached to the main cone? I can't recall the suspension mechanism…ferrofluid?

Did this just disappear, or are they still around in some form?
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Old 7th March 2014, 05:23 AM   #2
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Interesting question. I am aware of the ICT principle being used by Tannoy (Di5, Di6 - 5" and 6" drivers respectively, and CPA5, etc. being those drivers packaged in little outdoor PA boxes) - allegedly introduced to market around 1992. No idea on when or if production of these ceased.

A quick web search also led me to this article: Historically Speaking - Part 3 that suggests the design was originally licensed to Goodmans, who exited the hi-fi loudspeaker market in 1998. The article states that "Tannoy and Martin Audio still use ICT today", but I can't determine when that article was written - hence don't know if "today" really is today.

Last edited by w_oswald; 7th March 2014 at 05:38 AM. Reason: fixed the link
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Old 7th March 2014, 01:28 PM   #3
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Searching that site, pt1 was in the 3-08 issue: Historically Speaking - Part 1

pt2: Historically Speaking - Part 2

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Old 7th March 2014, 01:58 PM   #4
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Ah yes, Jensen licensed it from Goodmans.

The idea was it had better power response than a whizzer cone, albeit maybe not as good as a separate tweeter. But the power handling was kinda infinite compared to a tweeter as there was no tweeter coil to burn. And it was less expensive-it was mostly licensed to be able to use it in OEM applications for Ford etc.
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