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Old 6th March 2013, 11:27 PM   #1461
KLBIrd is offline KLBIrd  United States
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As we say in Amateur Radio. Fine Business Cal. That was a lot of tedious work and you have blazed new territory. I only wish I could hear them
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Old 7th March 2013, 12:29 AM   #1462
bcmbob is offline bcmbob  United States
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Quote:
Originally Posted by BP1Fanatic View Post
How would you do a setup for gen 1 ps3?
Sorry, I missed that post. Are you asking about cooling a PlayStation? Not clear.

Cal, can you compare the new build to the regular cornus?
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Old 7th March 2013, 01:31 AM   #1463
guangui is offline guangui  Puerto Rico
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Quote:
Originally Posted by Cal Weldon View Post
Baffles installed and drivers mounted. If you look closely, you can see how far from a perfect Pentagon they are. I'm still ****** at myself for not checking but gotta move on.

That's putty around the tweeter to seal off the hole. They have to be rear mounted and I guess I oversized the hole a bit.

Still fooling around with the stuffing but I decided to let loose on them last night. Got the wife mad at me but it was worth it. They are really loud.

XO is still a 4Ω resistor but the cap is now 1.5 fd. Not so much overlap with the woofer. I am getting to like that CSS driver. I know it's expensive but it has really nice mids to go along with the strong bass.
Nice work, I screw up driver holes all the time, so I know the feeling. Keep reminding myself that I need to order a foam core hole cutter and straight/bevel cutter from Art Supplies from Dick Blick Art Materials.

The Pentagons might not be perfect, but if you paint them in a playful color and add a long tail with bows they will look like a kite, perfect for a sound system in a child's bedroom.
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Old 7th March 2013, 01:41 AM   #1464
xrk971 is offline xrk971  United States
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Those look great Cal. Very nice - like Ken I wish I could hear them!
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Old 7th March 2013, 05:41 PM   #1465
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Thanks for the encouragement guys.

The sound? Well, I'd like to say I have reinvented the wheel, I have applied for a patent, copyrighted the design, the Folks from Dragon's Den and Shark Tank are lining up, Warren Buffett called I just received my invitation to the Bohemian Club.

Realistically? They are on a par with the large spirals. Many of the same plusses and minuses. Because the bass just oozes out of them it's tough to believe you are listening to a 4.5" driver. They really do reach party levels and are not flopping around like a beached whale. They sound great that loud.

For what they are:
Easy to build even with limited tools
Fast and cheap
Thin, so they can be mounted on a wall and not take up space
Highly portable so you can have them in your shop and move them into your yard in a flash
Unique design and a conversation starter

With all that in one package, how could you say anything bad?

Sonically, you all know from the spirals they are not the end all but I don't regret for a second the time they took. I just regret some of the mistakes I made along the way including the very first one (not perfect shape) so that there's no point in finishing them. Like the others, they will be sent to the speaker dungeon to be with their friends, and I can move onto something else. There are bigger fish that need frying.
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Old 7th March 2013, 05:57 PM   #1466
xrk971 is offline xrk971  United States
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A Party wall speaker eh? Very nice, are you reaching down into the 60 Hz region with the bass or is it mostly above 80 Hz? I actually do not! see the imperfect pentagon you are referring to. They look symmetric to me. Bigger fish to fry would be a huge tapped horn HT sub using Lowes 1 in thick isocyanurate foam sheathing! Build a 10 Hz 110 dB at 1 watt monster.
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Old 7th March 2013, 09:19 PM   #1467
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I have trouble venturing a guess how low it goes as I haven't listened to any test tones yet and with the extra mid bass, it kind of clouds the issue a bit. Thanks for not noticing the flaws and the misshaped box. Look at the top of the left hand box and you'll see where the wood overlaps the foam. On the right box notice the bottom where the wood and foam don't line up. Look at the two, the one on the right, the point is flatter where the one on the left is sharper. It would have been better if I hadn't rotated one of the boxes so at least they were equally wrong but noooooo, I had to throw that extra curveball in there just to royally screw it up.


Onto other projects..

Let's see...

In the woofer department, sitting on shelves or hanging on walls I have:
2 Eminence 18" PA
6 Selenium 15" PA
4 Altec 15" PA
1 Akai 15"
1 CSS 12"
A few 10" and smaller

What Dick Dastardly plan can I come up with next...
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Old 7th March 2013, 11:25 PM   #1468
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Old 7th March 2013, 11:50 PM   #1469
guangui is offline guangui  Puerto Rico
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Quote:
Originally Posted by picowallspeaker View Post
We've got the Popes
LOL... I am Catholic and didn't get your comment, but after reading it for like the 3rd time, now I got it. There is even a spare in case one falls from His head.
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Old 8th March 2013, 01:46 AM   #1470
xrk971 is offline xrk971  United States
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Default Folded Flat MLTL Stereo Speaker

I modified my earlier folded TL stereo wall mount speaker to be a MLTL by adding a constrictor vent. The bass response is much better now. I did not do a full sim, I just ran WinISD to calculate a BR vent based on volume and added the vent at the end of the line. The TL has stuffing in the first 2/3rds and now reaches down into the 50 Hz region with tight punchy bass (see freq response of vent before and after constrictor vent was added).

How does it sound? It sounds great! Very nice office/bedroom speaker and gets quite loud with good stereo separation considering the drivers are about 2 ft apart. Once decorated with a painting or poster, it will blend right in. The bass is very good due to wall loading and of course, no BSC is needed.
Attached Images
File Type: jpg P1040132.JPG (232.2 KB, 4634 views)
File Type: jpg P1040133.JPG (212.2 KB, 1050 views)
File Type: jpg P1040134.JPG (522.2 KB, 1028 views)
File Type: png Flat-MLTL-Freq-Resp.png (16.5 KB, 1198 views)

Last edited by xrk971; 8th March 2013 at 01:52 AM.
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