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In Reply to: Re: Out of curiosity posted by Donald North on February 24, 2007 at 11:40:47:
Donald,I assume you work for Aurasound. The same Aurasound that purchased the licence for the Linaeum tweeter. Your company really should resurect the Lineaum dipole tweeter and stick it on a medium size bookshelf speaker. There would be a large market for those speakers, trust me.
Follow Ups:
Hi Dennis,Thanks for the product suggestion. Yes, I'm the engineering director of AuraSound.
About the Lineaum dipole tweeter, there are some challenges with it:
1. Linaeum was purchased in the 90's by MYS who was a big supplier to Radio Shack and produced models for them using the Linaeum dipole and monopole tweeters. Later Aura Systems (parent to AuraSound at the time) bought MYS to get their sales. In the audio industry and among retail buyers and the buying public, whever we mention the Lineaum tweeter to people, they almost always respond "Oh, isn't that the Radio Shack tweeter?" Once a product gets branded as "the Radio Shack" product, it is very difficult, if not impossible, to get back a reputation as a "high end" product.
2. The dipole tweeter only went out to 10 kHz on axis. Off axis it went out to 14-15 kHz. We were able to improve the measured performance of the monopole some by changing the diaphragm material from a plastic film to silk fabric and magnet structure from ceramic to neodymium.
3. The dipole and monopole tweeters don't have the low-level resolution and detail ability like a good dome tweeter. I don't have a definitive answer why this is, but do have some ideas.
4. The original plastic film diaphragms were very photo sensitive and would distort when exposed to sunlight or even a flash light. This was a further motivation to change to the silk material for the monopole.AuraSound's business focus these past few years has been OEM transducers and systems. Developing a profitable retail product business is not easy and a slow road. When the financial situation is appropriate I definitely want to look into developing new AuraSound branded systems and establish a dealer network.
Donald,Thanks for the insight. I've always been interested in your products but have never owed any. I check ebay from time to time and have recently come across a small monitor that you make called the system one? I'm not sure of the name. Your website was never updated for the product. They were going for cheap on ebay, $60 or so a pair, and I was considering picking up a pair for my PC along with sonic impact amp. I can't find any specs.
Sorry to hear about the Linaeum tweeter.
Those were developed and made prior to when I joined AuraSound in the fall of 1995. They used a 5.25" paper cone woofer and Morel dome tweeter. If I recall correctly, they were a special build for Aura Systems' investors. They sounded bright and hard and need a serious crossover overhaul.
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