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In Reply to: RE: Hornresp now handles tapped horn posted by Bill Fitzmaurice on June 15, 2007 at 17:23:59
be nice to have that ability - - I've not used hornresp for a long time and when piddling with it today failed to open up the tapped horn option
when did you first do the "omni" type? - I remember a triangular half-horn of yours in Speaker Builder whose rear wave fired into a folding stand and front wave into a waveguide kinda like omni
Follow Ups:
Doing a tapped horn you just do a backhorn and leave both the front and rear chamber values at zero. It can get cranky about the number and type of segments, though, so follow the instructions. My Omni cabs are straighthorn/reflex cabs, nothing unusual there, though the O10, 12 and 15 vent the port into the horn, and that's very much a seat of the pants design process. The OmniTop 12 and 15 are more conventional, the ports vent direct. I intially modeled those using HornResp for the horn section, WinISD for the reflex, combining the two, though the final port sizes were determined by testing with completed cabs.
Hi Bill
I have not used McBeans thing yet but would comment that while one can find horn and driver parameters that work that way (rear driven horn with direct radiating on one side as described), the more useful and powerful alignments, evident in all the Tapped horns is that all have a horn section after the drivers second connection.
It is important (in the Tapped horn) that the two faces of the radiator be appropriately coupled to the one acoustic path to get the most out of the system, the idea is one then has a variable source impedance to compensate the horns variable load down low, hence a significant reduction in ripple and cone motion for a given size horn and cutoff.
This is not present in the rear loaded back horn at least to any significant degree like a proper T.H.
Best,
Tom
I haven't used it either, so no comment on its accuracy, but no reason to think it wouldn't work well. As to the rest, obviously one can't just toss some numbers into the program and come up with a box design, as the topology is just as important as the numbers.
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