Cornscala Build Finished

Good work.

Think if i was going to tackle a DIY project like this, i'd tackle Altec 19's now. But that's about a grand or 2 away right now. There's an AK thread on building those i have bookmarked.
 
Very Nice.

I have also looked into building these. Since my life is in a flux at this time I have no shop or space to work, or time for that matter. These are still on my radar though:yes:. Enjoy listening to them. dave
 
Arrow said:
Thanks again for the info and compliments. I would certainly recommend this project for anyone wanting in on the Klipsch sound without having to deal with older gear. Less than $2K for this type of soundstage is unbelievable.

I am getting a bit of an upper mid shout on older and poorly recorded records. At this point I am still chalking that up to my room which is pretty loud right now.

you guys just glue the insulation/poly to the inside, or staples maybe...?

Anyone wrap the horn with that stuff too? ...couldn't hurt...?[/QUOTE




You can fix the damping material to the cabinet wall(s) any way that works for you. I you do use an adhesive just don't use so much as to saturate the damping material itself or it will not work. Spray adhesive or staples work well.
If you want to damp your horns you will need a much more substantial material than the material used to absorb internal cabinet resonances. You will get excellent results with a constrained layer damping material like Dynamat and since it has an adhesive backing it is easy to apply. This is also used to damp automotive panels such as hood trunk door and roof panels. You only need cover about 2/3's of the surface area of any given panel section to gain full results. Hope this helps Best regards Moray James.
Click to expand...
 
Arrow said:
Thanks again for the info and compliments. I would certainly recommend this project for anyone wanting in on the Klipsch sound without having to deal with older gear. Less than $2K for this type of soundstage is unbelievable.

I am getting a bit of an upper mid shout on older and poorly recorded records. At this point I am still chalking that up to my room which is pretty loud right now.

you guys just glue the insulation/poly to the inside, or staples maybe...?

Anyone wrap the horn with that stuff too? ...couldn't hurt...?
Click to expand...

Staples should be fine. That's what a lot of speaker builders used back in the day. Rope caulk around the horns could help as well. Very nicely done - and welcome to AK!

-D
 
Well,

I went ahead and installed a thick cotton insulation to most of the interior of the cabinet. First thoughts were that they sounded like a little of the life was choked out. I tried a couple different configurations of insulation. The best was Top (covered), back (upper 2/3), one side (upper 2/3). I think the old Altecs used this configuration. I also wrapped the mid horn in insulation and secured it with a couple strong straps. The result was a little added clarity and a ton of weight and a little extra volume to the bass. Awesome.

Next step was to move them to the long wall in an asymmetrical layout in the room. Again, a little more clear and a big pumps to the low end. Even better.

I've got a few more little set up tweaks and then I'll do up some nice photos. I may even do some proper measurements in room. And then maybe a few room treatments to suit.

I can not recommend this project enough. Great speakers for under $2K invested.
 
looking at your pics, the issue is very obviously that crappy Leben you're using. pack it up and ship it to me - i promise you won't be sorry. :deal:
 
moray james said:
You don't need much by way of damping as the reflex vent is tuned to do that job (damping the driver box resonance) all you need is 1/2 - 3/4" of that high density yellow fiberglass they make those flexible acoustic ceiling tiles with. This is just enough to catch mid range reflections inside the box (the upper range response of the woofer) and eat them up and keep them from escaping via the vent. You might also try a set of four (per cabinet) of those Teflon glide disks sold for fridges and stoves you will find them at hardware stores. I have had better success with those than with spikes and they make speaker positioning really easily. Best regards Moray James.
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I like that idea of using thoe teflonglide discs. Im gonna get some for my Lascalas. They can be found everywhere, even wally world now. I use them on the wall unti/entertainment stand, couch, fridge why not speakers. Good Idea, thanks
 
You are most welcome. Yes they are worth it for the ease which they provide but they can sound excellent as well double bonus. Best regards Moray James.
 
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