Men mye kan tyde på at han har røyka for mye moro-tobakk eller spist for mye godteri da han her om dagen presenterte DENNE designprototypen.
En serie 2delte horn på 2,4x1,2x0.60Meter.



MASSIVE!
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Prototypen har montert en modifisert versjon av Void V18-1200 elementet og kassen viser spektakulære måleresultater.
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SPL-måleresultatet av en cluster på 4.
Rog Mogale skrev:The average sensitivity is 109.5dB and the f3 is 25Hz. Because of the steep rolloff its's flat from 27Hz. Overall response is 25Hz to 121Hz +/- 3dB.
I'm getting 4.7dB gain with 4 horns over a single horn, which is good. 6dB is the theoretical gain when jumping from 1 to 4 cabinets, but as djk rightly points out, cabs made from wood will never exhibit a true 6dB gain. 4.7dB is around as good as it gets and it's a sign that the constrution and bracing are working well.
In band max continuous output is 145dB with peaks of 151dB at 1 meter. Output readings measured with 6000 watts input, which is 1500 watts to each driver.
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The driver in each cab is a modded version of the V18-1200 and the horn length is 5 meters. You need all 4 cabs to make up a horn with a big enough mouth to be able to make use of the 5 meter horn length. You can use 2 cabs, but there is a drop off below 35Hz then. The throat of the Rubics design places even loading over the entire cone, so its not like a normal scoop with a throat at one end of the front chamber. The throat is placed centrally and in the middle of the rear of the driver in this design.
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Og her er et eksempel på hornets måleresultater i tidsdomenet:
Rog Mogale skrev:Here are two GD plots. The top one is for the Rubic horn, the bottom one is for a very big 2 x 18'' 6th order type A. Both cabs have the same f3, but sensivity is 102 for the BP for one cab. Its a big cab though and measures 1550 x 740 x 740, which is about half the volume of one rubic scoop. One rubic scoop is about 2 dB more efficient, but is double the size and only ueses one driver and not two. So for half the size and double the drivers you can have 2db less efficiency, which isn't a bad trade off for the BP. The scoops have a greater DI so are louder at greater distances.

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Rog Mogale skrev:Just took a reading from the center on the Rubic horn. Test mic distance was 1 meter.
Weighting is linear (4Hz to 50KHz) and response was peak, 50ms rise time constant. Playing some Irration style tunes with some Infinite amps driving the stack.