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Old 24th May 2013, 02:06 AM   #241
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I built a Lab 12 tapped horn like the one on the first page on the lab 12 thread. Someone built a single folded one on post 181. I need another one with a single fold, but that one is shorter. Is there a single fold that matches the original one in length? Please help a brother out. I want two Lab 12s in my living room. Bill
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Old 11th June 2013, 01:32 AM   #242
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Default Lab 12 build

I want to show you my Lab 12 build I did this winter. MY garage was full so I did it under the carport. I love it. Would like to build one with one fold so I can set it next to my fireplace. Anyone willing to help me with a single fold to match the original? Thanks, Bill
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Last edited by snailtrax; 11th June 2013 at 01:37 AM.
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Old 11th June 2013, 11:03 AM   #243
kees52 is offline kees52  Netherlands
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A single fold is easy to make, much more then the original one.

when use sketchup it will be easy but time consuming.

But why you want two? one is already very loud and enough for two
80 Hz satelites..

regards

kees
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Old 11th June 2013, 11:51 AM   #244
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by kees52 View Post
A single fold is easy to make, much more then the original one.

when use sketchup it will be easy but time consuming.

But why you want two? one is already very loud and enough for two
80 Hz satelites..

regards

kees
I built two when I did mine

I'll build two again if I ever rebuild them. Whenever I build subs, it's always a pair. OCD maybe, but I need symmetry.
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Old 11th June 2013, 02:08 PM   #245
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Quote:
Originally Posted by snailtrax View Post
I want to show you my Lab 12 build I did this winter. MY garage was full so I did it under the carport. Thanks, Bill
Nice build!
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Old 11th June 2013, 04:08 PM   #246
kees52 is offline kees52  Netherlands
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Symmetry is not really needed for box below 100 hz because ears dont have ability to find the source for such low frequenties.

You can make a double fold with volvotreter folding scheme, and then fine tune length.

I go make a exp folded tapped horn, it is smaller, and better delay.

Oictures are example of exponential horn..
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File Type: jpg exp-tapped.jpg (425.4 KB, 115 views)
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Old 11th June 2013, 04:42 PM   #247
nuconz is offline nuconz  United States
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it seems to me the only problem with this box is the 'wasted space'?
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Old 11th June 2013, 07:11 PM   #248
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by nuconz View Post
it seems to me the only problem with this box is the 'wasted space'?
Yes with a exponential one it is difficuld, but as I say it is example, I am prepared when sim is nice to have some wasted space, a horn has always some.

I go try a lab 12 fold for the exp box, it is the best bet.

regards

kees
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Old 12th June 2013, 02:06 AM   #249
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by kees52 View Post
Symmetry is not really needed for box below 100 hz because ears dont have ability to find the source for such low frequenties.
You'd be surprised how quick you can locate the sub if it's 1 m behind the listening position and the main speakers are 3 m O_o.....add to that my habit of having mad, wild EDM and dubstep parties once I get to drinking and the extra sensitivity helps.

I'm actually considering 4 subs.
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Old 12th June 2013, 10:15 AM   #250
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by DrDyna View Post
You'd be surprised how quick you can locate the sub if it's 1 m behind the listening position and the main speakers are 3 m O_o.....add to that my habit of having mad, wild EDM and dubstep parties once I get to drinking and the extra sensitivity helps.

I'm actually considering 4 subs.
This is because of delay errors and the production of producs who are hearable.
And afcourse the body itslefs do can find the location. sometimes ears get sgignals of the satelites who looks like it is very low bass, but for example 20 hz or 30 hz you can not hear only feel what makes it so exciting.

I am busy with a exponential tapped horn, who has far better delay and smaller box (240 liters in steat of 350 for the same low end) but building and folding will be a challence.

regards

kees
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