Rick wrote on Thu, 06 May 2004 18:23 |
Thanks to all for their comments, this is what I wanted to hear ! The number of 70 was the origonal plan for dual 18" horns, but it sounds like I should go for around 24 LAB's. I wont complain about that ! less storage as someone mentioned, and less cost. I think I will go with that. I have beeen looking over the plans yesterday and converting everything to milimeters from inches, fun...! Well, I will keep you upto date on my progression. Keen to hear any other storys about live dance/techno performences using the LAB's Cheers Guys Rick |
Al Limberg wrote on Sat, 08 May 2004 16:41 |
Hi Andreas, My lo-mid boxes are not totally home-brewed. As a Community dealer back in the 70s and 80s, I purchased 6 horn flares that they called 'Boxers'. The were based on the premeise that they provided the fibreglass flare and the box plans and we provided the box and labor to build them. The original cabinet was designed as a rectangular ported low end cabinet using your choice of either 2 15s or 2 18s. It was 60"h x 30"w x 45" d. As life works out sometimes, they just never got built. I originally purchased the Bowers on about 1982 and when I closed my retail store in 1989, they followed me home. I moved them from location to location over the next 13 years until the summer of 2002 when it became apparent, with the birth of the LabSub project, that I would need a source to bridge the gap between the subs and my M4 midrange units. I dug a Boxer flare out of my garage and took it out to Too Tall's shop and started messing with the idea of using it for a low mid. A little playing around showed that the flare would fit (barely) in to a cabinet with the sme footprint as I had made for my M4/s90 2" combos. With some help from a couple much more knowledgeable speaker-designer types from here, I proceeded to build the boxes and load them with some JBL 15s that were available for just over 'free' at their tent sale. Thru the input of the folks here and some just plain good luck I suspect, they turned out very usable - we aimed for a solid response from 80-300hz and Praxis tells us we managed to get exceptional results from about 75 to 1200 with the low end EQ-able down to 40 if necessary. (As a matter of fact, I used the boxes as my low end until the Lab 12 drivers became available. While I don't know where one would find additional Boxer flares, for what it's worth, the depth of the 'horn' is 36" from front lip to baffle and 45" is th eoverall depth of the box. It is unported but still stands 49 1/2" tall and 30" wide. The actual holes in the speaker baffle are 13" in diameter with the speaker chamber somewhat less tha 3 cubic feet. I used JBL 2035H drivers. Al |