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Old 12th March 2013, 10:04 AM   #41
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Quote:
Originally Posted by col View Post
This is my current FOH, the subs are 4 x Peavey 18" Lowriders in 135ltr BR enclosures. The kick-bins are P.Audio 15" E15-350N, tops 12" E12-250N with 1" selenium Dt220i on a clone JBL waveguide. Probably not as loud as Tapped Horns which I would really like to build when finances are available but still quite capable and very mobile. All the cabinets can be lifted individually by one person.

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col.
What sort of crossovers/frequencies are each cabinet being run at?
Do you find front facing subs to be better than horns?

-Steve
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Old 12th March 2013, 10:07 AM   #42
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Originally Posted by stan View Post
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Lots of foam.
Dont take this as me knowing everything! As i really dont!

But did you find the foam help with the sound at all? Have you tried without to see the difference?
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Old 1st April 2013, 09:46 PM   #43
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..and now with some (bad quality)photos...
Click the image to open in full size. Click the image to open in full size.
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Old 6th May 2013, 12:07 PM   #44
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marunga: we need better images, you can't make anything out.

Just finished stereo sub-woofers (subbies) today. Based on some seven year old polycone 12" woofers which have been in a few other systems. 60lt boxes with lots of internal bracing. The boxes will be driven my a 50W Class D amp.
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Old 7th May 2013, 07:55 PM   #45
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Hi,

Please check my gallery. uploaded some hig-res photos.

regards,
m
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Old 15th May 2013, 10:06 AM   #46
dnic77 is offline dnic77  United Kingdom
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hi everyone, this is a sub ive made for a friend. it uses a bk electronics amp and dayton high fidelity 15". its in a 4.29cuft sealed enclosure made from 30mm mdf and internally braced with oak and finished with oak and gloss white formica. so im hoping he likes it.
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File Type: jpg 2.jpg (24.9 KB, 200 views)
File Type: jpg 3.jpg (24.7 KB, 270 views)
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Old 15th May 2013, 02:38 PM   #47
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Dnic77: looks serious.
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Old 15th May 2013, 08:20 PM   #48
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dniс77, the subwoofer will not jump? Usually make the cone stand rigidly attached to the body of the subwoofer
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Old 16th May 2013, 06:26 AM   #49
dnic77 is offline dnic77  United Kingdom
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thank you mhouston, my friend wanted people to think it was just a table. hi petr1951, im not sure what you mean. are you refering to the cone being mounted on the bottom and that will cause the box to jump around? if so then no because of the weight of the thing.
thanks for the replies.
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Old 24th May 2013, 04:30 PM   #50
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Default Lab 12 based subs

Here is a pair of Lab 12 (6 ohm version) based OD_ML_TL's.
That's Offset Driver_Mass Loaded_Tuned Length's.
The 2 boxes are slightly different versions with different port tunings.
They easily gobble up 29 Volts, about 200 watts I believe, but my house does not like that much power. Of course I do.
Each cabinet is about 128 Liters with a 280 CM horn path.
I included a few 1 Meter sweeps done with REW on the first box at different places in my listening room.
The calibration is as accurate as I could get it with a Radio Shack SPL meter following the REW instructions at 91 dB, but it could easily be 3 or 4 dB high.
The tests however were done in a concrete house, so room gain is dominant.
The one sweep shows an in room F3 of 16 Hz or so
.
Credit has to be given to Bjorno, Oliver (tb46) and NWCgrad for the design.
A thread is here Lab 12 Based Offset Driver - Mass Loaded - Transmission Line (OD-ML-TL) Design by Bj

Dave
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File Type: jpg tn_Pair of Lab 12 OD_ML_TL.JPG (416.2 KB, 314 views)
File Type: jpg tn_Jan 12 sweeps.jpg (217.1 KB, 231 views)
__________________
<---My Transmission Lines from a prior life...Top one Tweeter...Bottom one definitely a Sub
..In space, you can't hear my sub

Last edited by Shadydave; 24th May 2013 at 04:32 PM.
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