Joe D'Appolito is technical director of Audio & Acoustics Ltd. and well-known for his research in loudspeaker design. The D'Appolito Loudspeaker Design was called after him.
He illustrated to a selected group of experts (among others Joachim Gerhard from Audio Physics, Günther Nubert from Nubert Speaker Factory, Berndt Stark from Quadral and further representatives from Canton and other companies) how to design a reference loudspeaker and 5.1 home cinema system.
As an example he presented his latest project incorporating Alcone drivers AC1 HAT, AC 5.25 HES and AC10 HE, a system with extraordinary dynamics. The presentation included the following topics: - The human ear's ability to hear - The question of what makes a good loudspeaker - The design process and how it should be carried out - The tools (measuring, CAD of cabinets and crossovers) - General considerations regarding acoustic analysis - The detailed design process for the Alcone Reference Loudspeaker
A discussion and a listening test followed.
The Alcone equipped Reference Speakers were ready for examination: - the incredibly dynamic floorstanding front speakers equipped with AC1 HAT, AC 5.25 HES and AC10 HE - centre speaker with AC1 HAT, 2x AC5.25 HES - the rear bipolar speakers with 2x AC1 HAT, 1x AC5.25 HES - and - due to the bass competent front speakers - the almost unnecessary subwoofer with AC 12 SW.
Ralph Mantel passed on all documents to the magazine Klang+Ton where the kit was published in issue 6/2003. Since then the Alcone Reference System is available from us.
For those who are interested, the key points of this presentation may be read up in the second part of Joe D'Appolito's book: Loudspeaker measuring technology. PC based analysis of analogue systems.
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