I just dripped hot glue on my arm today. Ouch! I actually smooth the hot melt like caulk with my fingers but there is a trick: flip your finger around so that the finger nail does the tooling. Don't do too long of a stretch and you won't burn.
I finished the build of the Wedge TL mp3 stereo player using the cheap Microcenter drivers and amp. I put some magnets on the original grill covers to hide the ugly drivers. First listening impressions: not so good, I think I have to play with the stuffing but it sounds tinny, maybe worse than original plastic cabinets (which I modded with pillow stuffing so they weren't too bad). This also might be a case of the odd triangle shape of the TL contracting and expanding. Usually, a basic TL sounds better than tiny box. The form factor is convenient though and it sits nicely flush against wall on the back of a desk if your desk backs against a wall. I will post before / after sound once I finish tweaking stuffing - good or bad. I am hoping to make it the norm that folks share the sounds of their creations as well as photos. 
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It doesn't seem to cool as fast on your skin as it does on your project.
Me three!!!
But it's not quite az hot az solder - and I won't even get into the subject of hot slag from welding!!!
May I offer a tip? As one who has experienced the 'kiss' of hot glue, I now wear disposable latex gloves when using the glue gun. This has saved me considerable pain.
And looking towards the new year, when I hope to have a bit of free time, I am planning on giving the 27" Cornucopya a try. An old friend who died a couple years back left me a pair of DIY speakers containing Altec Lansing 405A (4.5" ?) drivers. The small sealed cabinets produced nothing in the bass region, so I have been wanting to try them out in something fast, cheap, easy...
Cheers, Jim
And looking towards the new year, when I hope to have a bit of free time, I am planning on giving the 27" Cornucopya a try. An old friend who died a couple years back left me a pair of DIY speakers containing Altec Lansing 405A (4.5" ?) drivers. The small sealed cabinets produced nothing in the bass region, so I have been wanting to try them out in something fast, cheap, easy...
Cheers, Jim
Hi Jim, That driver looks very adaptable as you'll notice huge changes in the low end depending on the stuffing in the center chamber. You may find that a lot less stuffing is needed for the Altecs.
I just looked at the specs for the Altec 405a driver. Looks like it could work well in a Cornu, but lacks a sparkling high end which may be needed to balance the large bass output of the horn. You can always add stuffing to balance out though. It's an older driver but has high sensitivity of 92 db. It's a good size though at 4 inch nominal size.
http://www.google.com/url?sa=t&rct=j&q=altec%20lansing%20405a&source=web&cd=2&ved=0CDMQFjAB&url=http%3A%2F%2Fwww.greatplainsaudio.com%2Fvintage_altec%2F405A_ceilingspkr_spec_sheet.pdf&ei=JU_PULWZCO7q0QHI6oBA&usg=AFQjCNG0S436JKhKDVm_ChzaQEODyIoB0A&bvm=bv.1355325884,d.dmQ
http://www.google.com/url?sa=t&rct=j&q=altec%20lansing%20405a&source=web&cd=2&ved=0CDMQFjAB&url=http%3A%2F%2Fwww.greatplainsaudio.com%2Fvintage_altec%2F405A_ceilingspkr_spec_sheet.pdf&ei=JU_PULWZCO7q0QHI6oBA&usg=AFQjCNG0S436JKhKDVm_ChzaQEODyIoB0A&bvm=bv.1355325884,d.dmQ
Couldn't this enclosure be converted to a two way with something like the Audax 10 mm Dome. I have used several over the years and consider them quite a bargain.
Bob,
I have thought about this 2 way idea too. I was looking at the Pioneer TS A878 3.5 inch coaxial two way. It has some nice specs and good efficiency. It might be a drop in swap for the Vifa cutout? Your suggestion of a discrete tweeter could be done by putting the tweeter a little offset, or stretching out the driver cavity to an oval or rectangle rather than square. We had a discussion about rectangular cornu's earier. Someone should try it or my coaxial idea.
Amazon.com: Pioneer TS-A878 3 1/2 Inch 2-Way Speakers: Car Electronics
I have two of the Audax on hand. Can one of you gurus suggest a super simple crossover to match them up with the Vifa TC9FD-18-08. I know that's a full range, but a split in the spectrum might relieve some of the load on the Vifa. I have some 3" woofers also, but I'll have to find the specs.
Ive been considering a pair of cornus with my little Alpine 4inch coax drivers. but would also like to do a rectangular horn with my (also) Alpine TypeR 6x9 drivers.
if bass is where its at, id like to have a set of speakers that effortlessly pumps it out. im very much disliking my BR speakers for this reason, they seem very strained to do any real output.
so, i guess the Q comes to what happens to the horn path when its stretched one direction only? someone said it shrinks in sections?
There's nothing magic about the Cornu's "split horn" design. (Short "primary" horns, each splitting into long and short "secondary" horns.) Modelling indicates that the area discontinuity where the horns join causes the main resonance to be higher than it otherwise could be.
You could just as easily design it as a single length horn in Hornresp, then coil two horns each half the area of the single horn so that they exit from the short sides of the (rectangular) enclosure.
You could just as easily design it as a single length horn in Hornresp, then coil two horns each half the area of the single horn so that they exit from the short sides of the (rectangular) enclosure.
The TC9FD needs no tweeter, you would be adding the messy crossover into an otherwise Nice FR. Maybe a sub to make it into a FAST but no tweeter.
