Are you speaking about this design : http://fullrangedriver.com/tiki-view_forum_thread.php?forumId=1&comments_parentId=3297 ???

But i'm not sure i really understand the port placement.
Would you have a plan ?

Hi again,

I got pretty close on all the measures but changed the port
substantially. There is a description and drawing of the
GM MLTL at the EJ Jordan Website. You could use the measures in
the link above for the FE127e.

Here's what I did: I got some 69 cent shelving which
I didn't have cut at all in the long length and the end panels
had to be trimmed to the right depth.

Having your own table saw helps with all this: I have
to ask someone occassionally to borrow some table time...
even that is real sketchy.

Cut the speaker hole with a 3 11/16 hole saw or a 4 in.
4 in is easier to find.

I chamfered out the back using a 3 dollar chamfer bit
mounted in a spin saw (spin saw is like a Rotozip).

The 6 in port I used is made from 2 in od pvc pipe
from the hardware/plumbing store and the hole is cut
with another hole saw of 2 in. diameter.

So far we have a box with speaker mounted on the
face, chanmfered back and _no stuffing_ with a couple holes
drilled in the back to let the speaker leads out.... and
a 6 inch white pvc tube sticking out the bottom.

What to do?

I tried making a custom stand from more of the
shelving stock but the easier solution was to take 2 of
those cheap 3 shelf plant stands that are found in any big box
store in their so-called furniture department. Well their so-called furniture is my _only_ furniture just about. I used the 2 in
hole saw to cut holes in the plant stands and pushed the
ports down through those.

They're almost the right height at ear level but close
enough.

I made some grilles from some double knit fabric glued
onto some 1/4 in masonite. I managed to cut the centers out
with the spin saw, but this is not recommeneded.

Back to the original port design from GM: that can be put
on the front, on the back or out the bottom... it can be made
with a 1 in. hole saw and a couple layers of whatever comes up to the
1.125 (whateves) depth. I didn't like the sound from the
stubby ports... it was low but not _clear_ on plucked string bass.

So I lost a bit on the organ recitals I use to test builds.

However my main application is jazz shows and use with
the dvd-tv and streaming audio net news broadcasts.

If you aren't faint hearted when it comes to using EQ,
this design works well and will teach a lot about how much
can be done with a little.

Any questions, come back again.

The link below is another design that looks interesting for
an inexpensive driver in the Fostex line: a labyrinth tl
with mirror side ports.

I cannot find the MLTL Jordan design at the moment. In a
full speaker cab design, the longish port extends out the bottom
and the side panels can be full length to the floor. A 45d
baffle is used to focus the port energy out toward the
listener
|
|(
|
|_
\

sort of like that in stick men terms: profile view.

• Fostex design for a FE108 Sigma

• GM MLTL photo