There aren't many 12" tapped horns for prosound. The Lab 12 is a great driver for the price, has a strong cone for tapped horn high(ish) compression ratios, and a good amount of Xmax.

12" tapped horns can be much skinnier than 15" and 18" horns, and with the price of the Lab 12 ($165) one can use 4-8 horns and not hurt the wallet too much.

With multiple horns as opposed to one or two large 18" horns, you have more options for stacking and setup.

Figure with the 400w rms rating of the driver, huge amps aren't needed to drive the cabinets to full output.

So here is the breakdown:

$165 Eminence Lab 12 (readily available, been around forever, now two voice coil options available)

$60 per 5x5' 3/4" Baltic birch (2 sheets required)

$40 for Casters, Durtatex, terminal, screws etc

Simple folding, easy to construct. Will have handles and casters for easy transport.

38" High x 30" Deep x 15" Wide cabinet (about 10 cubic feet or 300L)

Low corner of about 35hz

15" wide cabinet maintains truck packing dimms

Group of 4 plus 2000watt amp will provide plenty of output for as little as $1600 ($1300 for 4 cabinets plus $300 for amp)

This build is with the original 6ohm driver. The new Lab12c may also work, not sure.

Lets call it "

AutoCAD drawings, 2D: (post #123)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

3-D rendering: (post #127)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

Construction Technique, order of panel installation: (post #129)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

Initial measured results: (post #82)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 9 - diyAudio

Now that the sub is constructed and tested, we can post some final specs.

Operating frequency: 34Hz----120Hz +/-3db

Dimensions: 30"x38"x15"

Impedance: 4 ohms

Power handling: 400w rms, 800w program High pass 32Hz 24db/octave minimum

Weight: TBD

12" tapped horns can be much skinnier than 15" and 18" horns, and with the price of the Lab 12 ($165) one can use 4-8 horns and not hurt the wallet too much.

With multiple horns as opposed to one or two large 18" horns, you have more options for stacking and setup.

Figure with the 400w rms rating of the driver, huge amps aren't needed to drive the cabinets to full output.

So here is the breakdown:

$165 Eminence Lab 12 (readily available, been around forever, now two voice coil options available)

$60 per 5x5' 3/4" Baltic birch (2 sheets required)

$40 for Casters, Durtatex, terminal, screws etc

Simple folding, easy to construct. Will have handles and casters for easy transport.

38" High x 30" Deep x 15" Wide cabinet (about 10 cubic feet or 300L)

Low corner of about 35hz

15" wide cabinet maintains truck packing dimms

Group of 4 plus 2000watt amp will provide plenty of output for as little as $1600 ($1300 for 4 cabinets plus $300 for amp)

This build is with the original 6ohm driver. The new Lab12c may also work, not sure.

Lets call it "

**PAL12 Subwoofer**" For P.A. Lab 12 Tapped Horn**DIRECTORY FOR THIS THREAD**AutoCAD drawings, 2D: (post #123)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

3-D rendering: (post #127)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

Construction Technique, order of panel installation: (post #129)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 13 - diyAudio

Initial measured results: (post #82)

$325 Lab 12 based PA tapped horn. ~35hz extension - Page 9 - diyAudio

Now that the sub is constructed and tested, we can post some final specs.

Operating frequency: 34Hz----120Hz +/-3db

Dimensions: 30"x38"x15"

Impedance: 4 ohms

Power handling: 400w rms, 800w program High pass 32Hz 24db/octave minimum

Weight: TBD

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