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

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M

m R g S r

Member
Joined 2011
Not yet. The tests were the first power I had going through it.

Btw this driver is well broken in. I have a new one on order to build a second cabinet. I will test that as well with the brand new driver abs see if its any different.

I am also in the process of building active tops for these cabinets. Can't wait!!
 
M

m R g S r

Member
Joined 2011
m R g S r said:
Here is the updated sketch / layout....

imageijrc.jpg


A. 29 1/8" x 13.5"
B. 30" x 13.5"
C. 24 1/2" x 13.5" (subject to change with the keystone / different mouth size)
D. 21 7/8" x 13.5"
E. 13" x 13.5"
F. 28" x 13.5"
G. 23 7/8" x 13.5"
H. 9" x 13.5"
I. 16 3/4" x 13.5"
J/k. (Side Panels) 30" x 38"
Click to expand...

Those dimms are all accurate, that's what I went by.

Board G is connected to board D at a right angle.

I H and F are all connected at right angles as well.

Board E (for caster mounting) is at a 45 deg angle with boards A and D.
All miter cuts on those boards, E, A and D are 45deg.

The distance between boards G and F at the base is 5cm. (S1)

S2 is 6.2cm.

Driver height is centered at 21cm from s1

Basically I need to give you the positioning of boards G and F relative to the front or rear of the cabinet.
 
T

tb46

Member
Joined 2006
Hi mRgSr,

I could give it a stab at drawing PAL12 in AutoCAD, but I would need the additional dimensions indicated in the attached picture, and I don't know when I'll be able to get to it. Would 23/32"[18.25mm] be OK for the material? Maybe epa or Xoc1 can take get to it faster than I can.

Also, where is the lastest greatest Hornresp input?

Regards,
 

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E

epa

Member
Joined 2010
at your service :)
materail thickness is always diffecult.
for the double 15 whe used birch 13 ply wich was 17.9 mm.:confused:
a few monts ago whe used birch 13 ply wich was 18.25 mm:eek:
i think its best to do 18mm .
ill do it this weekend.
first some more testing on the double 15 tomorrow :)
 
Z

ZivkoF

Member
Joined 2011
m R g S r said:
Here is the input screen...

pal12input.jpg


SPL at about 400 watts....i notice the large dip in the response. who knows if that will actually be there on the test cabinet; we will find out! (i know people say hornresp exaggerates the peaks and dips)
pal12spl.jpg


and it should be right around xmax at 400 watts or so
pal12displacement.jpg
Click to expand...


Hi,

I think that L34 should to be 32 and not 16 in your Hornresp simulation, distance from the back of the diver cone.
 
M

m R g S r

Member
Joined 2011
Okay so the wood measured from 18.2-18.42mm. I think it's safe to just assume 18mm ply. I wrote 18.4mm thickness in the drawing.

All the dims are written in black, just as the red lines are on the drawing in post 108.

imagezrqd.jpg


The 33.8cm and the 40.7cm are measured along the top edge of panel D.

Just in case you can't read the numbers I wrote down, staring from above the angled caster board (E) the numbers are, going clockwise,
19cm
23.8cm
29cm
40.7cm
33.8cm

Wood thickness is 18.4mm. Lets assume 18mm.
 
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