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Showing 1 of 8 conversations about:
SpecialEd
100
Sep 3, 2018
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I need to start a collection of spectacular marketing mumbo-jumbo...
"...ensures direct and reflected sound arrives at the listening position at the same time. To achieve this, the speaker has a 1-inch tweeter positioned at the APEX of the 4-inch front-facing driver...Additionally, the upward-firing concentric speaker is comprised of a 4-inch mid-range driver with a 1-inch tweeter mounted in the CENTER to produce a more immersive sound experience."
Coax. Essentially the same design they were using for $20 6x9's in the '80's.
Sep 3, 2018
ElectronicVices
2937
Sep 6, 2018
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SpecialEdA concentric driver is not at all the same as a coaxial speaker from a design standpoint. The source of high frequencies is much more localized when we process music. If the treble and midrange sources are separated by too great a distance it can impact the image our brains conjure up. A concentric tweeter sits wholly within the midrange driver and is not simply a tacked on housing with a separate driver. There is certainly a lot of marketing BS but your cited excerpt is actually a pretty low scoring example. I would recommend you not explore this enthusiast community further as it will likely trigger the hell out of you.
Sep 6, 2018
SpecialEd
100
Sep 6, 2018
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ElectronicVicesMy strong suspicion is the upward facing and front facing driver components are identical units, yet the writer describes each unit separately AND differently.
In fact, I'm going to make the rather strong claim that a single unit cannot be created which has the tweeter integrated (flush) at the APEX of a 4" driver, as stated. Doing so would put the tweeter smack in the middle of the surround, also interfering with 'balance' of the larger driver.
Yamaha, and I'm sure others, have designed the larger driver with a 'bite' in the mount to reduce distance between centers, but the tweeter is still outside the radius of the bigger driver.
Sep 6, 2018
ElectronicVices
2937
Sep 7, 2018
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SpecialEdThey use two different (but still accurate) words to describe the same driver. Apex is the top or highest point of something... in this case a speaker cone, the tip or center of that cone is the apex. There are many schools of thought on how to achieve a single point source for the mid and treble drivers. I have an offset D'Apollito array in my tower speakers, KEF, ELAC, Pioneer and others use concentric drivers, yet another is using a full range driver like those employed by Tannoy. You are accurate that designing a proper concentric driver is difficult, this particular speaker was designed during Andrew Jones tenure at Pioneer. If there is a designer I would trust to understand the pitfalls and benefits of this type of driver, he would most certainly be one of them.
Sep 7, 2018
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