Regards,
Carl Huff

Cheers

About smaller systems suitable for the LAB12 woofer, Mike E has built some smaller horns, and they modeled quite nicely from 40Hz up. The LABhorn was designed for 30Hz, I believe, and so Mike's horn trades 10Hz on the low end for size.

Another thing I think is pretty attractive is to use them in a 2ft3 to 6ft3 cabinet tuned to 22Hz. That will provide maximum output of about 115dB at full power, which is not too bad for home use. The small size is nice too.

I understand that lots of people using the LABhorns for home theater are EQ'ing them below 30Hz. Down where the horn unloads, the system becomes a direct radiator so that makes sense. Removing the horn makes this unneccesary, but the obvious reason is that now the entire subwoofer range requires more power.

Been lurking around in the background still! Currently CADing up my new horn sub - settled on Beyma 12LX60 for widest pass band and flatest response down to 30Hz or so. Am planning some high-mid horn experiments with Eminence Alpha 6 soon (hopefully within this next month) - setting up some trial phase plug designs on CAD now. Starting to get colder now here as we head towards winter, which is a bit of a pain for building stuff outdoors...

Cheers
Graeme

hi carl

I modeled up a 40hz horn for the lab12,for corner usage in a home.
No doubt,im sure it would be impressive. I have a 40hz horn already,and i like it alot,infact most the time (depending on program material) i cant tell if im using the 40hz horn or 33hz tuned jbl (ported) as i switched between them alot comparing.

Certain tunes will use that low end extension. I certainly would think a 40hz F3 is a valid target for most music especially in pro usage

Sizes were about 300-400Litres depending on if its a corner use horn or stack of 2 or 3 in 2pi space.

Although never built(due to $ cost)Everyone on the forums trusts mcbeans program to model an accurate response.

Cheers!
Mike.e

also
http://homepages.paradise.net.nz/quadroph/ts/ts.html

Btw my 40hz horn does 126db in the car with 20watts :-)

For the sub, I was originally planning something along the lines of the LabSub. However, as these will be for pro use, I decided I am getting to old to continually lug that sort of weight around. Therefore I will be using single driver cabinets in multiples. Compared to the Labsub, these will be a bit taller (which gives better height for top boxes), about 60% the width, and not as deep (easier to fit in some venues). In that I can get longer horn path and larger than half LabSub mouth - should work well. Folding is along the LabSub lines, however longer path means more spiral overlap - looks like cross between LabSub and spiral horn. Autocad makes designing this much easier.

Cheers
Graeme

I agree with you 100% on the crossover point for compression drivers. I know some of the really old stuff was made to be used down low, but the new parts don't sound good to me when crossed over low. Plus they don't handle any power so you lose all the dynamic range benefits if you push 'em too low. And probably more than all of that, I just don't like having a crossover in the vocal range.

Your subwoofer sounds great. I'm interested to see it when you get it done. I've had a few new projects on my plate too, so I've been too busy to loook around and see what everyone else is doing these days. Please keep us posted.

Wayne

It still busts me up to see your basshorn in a compact car. How I wish you would pull up on the local strip here in Tulsa with that thing blaring. I'd love to see their jaws drop when your car glass vibrated an inch from the SPL.

Wayne

Regards,
Carl Huff