$325 Lab 12 based PA tapped horn ~ 35Hz extension

[eusubius]

Using pocket holes for screws!

What glue are you using?

Really makes me wanting build 2 as well, if I'm going to go to all the work in the first place!

 

[phivates]

Definitely make two as the second one takes half or less the energy of the first. My friend who built 4 of these, and 8 Labhorns, swears by basic Titebond I. His boxes do not come apart after years of loading in and out.

 

[djtimmy77]

Pocket screws make assembly of the panels very easy. I ise PL premium adhesive. Not as strong as titebond but fills on any small gaps from imperfect cuts.

 

[phivates]

PL is reliable stuff for sure. And pocket screws also.

 

[djtimmy77]

One sub is ready for paint, the 2nd started assy tonight.

 

[djtimmy77]

The painting has commenced. 1 coat of primer and 2 coats of duratex, then final assembly and testing

 

[eusubius]

Is this the OSTL you were talking about Brian?



Transmission Line Isobaric Subwoofer for home. - Page 2 - AVS Forum | Home Theater Discussions And Reviews

 

[Brian Steele]

Nope.

There's one in this thread, but it's not the one that uses my MLTL layout:

Lab 12 Based Offset Driver - Mass Loaded - Transmission Line (OD-ML-TL) Design by Bj

 

[BP1Fanatic]

The painting has commenced. 1 coat of primer and 2 coats of duratex, then final assembly and testing

Love the Blaupunkt blue!

 

[djtimmy77]

The PAL12s are pretty much done. Just a quick 2nd coat of duratex on the final side of each box. I will get some REW measurements next weekend and put them up here.

 

[LORDSANSUI]

Beautiful cabs

 

[BP1Fanatic]

+1! So how do they sound?

 

[djtimmy77]

Listened a little on sunday, sounds nice, but plan on measuring this weekend and maybe playing a bit more.

One last picture for good measure! 😄

 

[phivates]

Gotta sound good playing the blues!

DOH!!!

 

[WaVeInFoRm]

HAHAHA

 

[djtimmy77]

Finally was able to do a sweep outdoors today. Pretty close to the sim. A little EQ to smooth out the dip and they sound great.

The 12mm baltic birch sides don't seem to be an issue from my perspective. Not much flex and shaved a lot of weight off the boxes.

 

[eusubius]

Did you have a reference for power & distance where you did the sweep?

 

[djtimmy77]

4 or 5 feet away on the ground, power was not calibrated at all.

 

[eusubius]

Ok thanks. Grass or cement?

 

[djtimmy77]

Concrete

Also that was a brand new driver.