My 18" horn, Invader Bin

nineleaves wrote: I may goto the trouble of providing a set of scale 2d dxf cutting sheets, when i have time. But sorry no 3d files will be released at this time.

Looking tasty indeed! 

Grins.. much approval, nice job :)

:) ...Ill put up the designs for the single lab 12 one next.
Still got 8 of them to sell here due to alot of time wastering going on. 

Design on the single lab 12 has been improved imo in a number of respects, theres a much larger air coupling area than the original labs, allowing use of less drivers/boxes to get a beefy result and 'ideal' coupling. They include a force air cooled heatplate system that transfers heat directly from the drivers pole piece to the 'outside' air, which amoungst other things helps prevent the driver from cooking under prolonged use. also each cab is a far more manageable 65kg ..instead of the lab x2's 100-120kg ! 8 in a linear line are shockingly directional in the horizontal plane, 8 stacked in a manner like the invaders above provides an efficient, yet wider spread dispersal. so overall quite flexable things :)

The solution on paper to the problem isnt wholly ideal, but in reality it actually works really well :)
consists of a hollowed out aluminum insert that goes into the pole vent on the lab 12 driver, whilst still allowing it to breathe in the rear air volume, this is then thermally coupled to an aluminum panel in the airpath of the horn as it folds round the driver, works astonishingly well. Spanked the cabs flat out all day and night one weekend and then took the access hatch off & measured temp ..barely above room temp ..something like 23-25c if i recall correctly ?