Pure nonsense.
On page 15, Fig. 4 (PNC 4) represents manufacturer's measurements of a fullrange unit in a closed box. Fig. 5 and 6 are measurement of the same fullrange in the "orthogonal design" enclosure. Not a single word about measurements conditions, so somehow magic happens and the same fullrange measures flatter above 1 kHz! It looks to me as an aggressive averaging, like 1/3 octave. No wonder it is flatter, but author goes lyrical about advantages of his design, not mentioning averaging.
Also, the same magic makes higher efficiency, including the range above 1 kHz - which is impossible.
On page 15, Fig. 4 (PNC 4) represents manufacturer's measurements of a fullrange unit in a closed box. Fig. 5 and 6 are measurement of the same fullrange in the "orthogonal design" enclosure. Not a single word about measurements conditions, so somehow magic happens and the same fullrange measures flatter above 1 kHz! It looks to me as an aggressive averaging, like 1/3 octave. No wonder it is flatter, but author goes lyrical about advantages of his design, not mentioning averaging.
Also, the same magic makes higher efficiency, including the range above 1 kHz - which is impossible.
That floor-bounce thing creates a large room impression, at the cost of location (one of the greates advantages of BB drivers) and separation, besides coloration. Very position and room dependent, works only on a hard floor surface. Unusual first impression but that effect becomes boring or even annoying very quickly.
I completely agree. The thing is, the 'flatness' depends extremely on the position of the mic/listener and speakers. You got a different listening position, different ceiling height or placement of the speakers, you want to move? Too bad, then it won't work anymore.
"Crucial for the design is that all dimensions are relative to the size of the driver"
If not earlier, no one should make it much further than this in the article.
Not that I don't enjoy certain off-beat designs, but there's nothing here really.
If not earlier, no one should make it much further than this in the article.
Not that I don't enjoy certain off-beat designs, but there's nothing here really.
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Exactly where I stopped paying attention....
Would be perfect for around here, where manufacturers and sellers are more interested in giving physical sizing and weight of a driver, rather than its parameters. 😉
A typo by any other name... he meant 6th. And it will have a mild frontal loading / filtering effect due to being in a partial cavity, albeit less than would be the case if that was choked down further.
I have an image of all these enthusiastic designers beavering away frantically trying to come up with an original design for a box to put a speaker in......
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