Was approached by a referral who wanted me to construct a cabinet
for a full range driver. After looking at several drivers (Lowther and Fostex among
others), he decided on the Fostex F200A available from Madisound http://www.madisound.com



Click on image to enlarge

Once he had picked the driver, he went on a search of the Net to
find a suitable cabinet. After days of looking at and discussing possible
cabinets, he decided on the Singular, unfortunately the site that had
that info is no longer available. But some info from that site was copied, and follows.



Our true full-range single driver system

Simplicity, easy to built and very good balanced in combination with drivers having a Qts
between 0.3 and 0.6 from which you can choose. If you like your FE206E's in a reflex
then you will love them in the SINGULAR for its more efficient loading over a wider range.
If you like your Lowther driver in a reflex then you will love them in the
SINGULAR even more...

The basic design for this system was initiated by Onur Ilkorur for his AER drive units,
providing a pretty efficient loading over a wide range. The system is not a Bass Reflex
which is only efficient for half an octave, it is not a Transmission line with the need of
much damping material to dampen all resonances, it is not a TQWP or ML-TQWP but it
is a combination of all these systems resulting in a wide-band resonator effective from
40Hz up to 250Hz.

The system is tuned for maximum efficiency using as less damping material as possible,
no hornyness or honkyness coming from these using only the few 30mm thick sheets of BAF
as shown in the drawings. The only thing you have to find is a good place for them in your
room, for more body and bass simply place them closer to the back wall or even in the
corner (lowest Q drivers), if there is too much bass or "boom" then simply pull them out of
the corner or move them further away from the back wall until you have found your
optimal balance.

Below you will find the drawings for our SINGULAR DIY system.

The best material to be used for this system is 18-19mm Birch Ply, as always
with full-range drivers, this material gives the most natural tone. The few 30mm
thick sheets of BAF should be placed as shown in the drawings.



End of info from that former site.
What follows is my project of building cabinets, based on that info.
The first thing to do was recalculate the sizes to rational numbers.

Click on image to enlarge

Click on image to enlarge

After converting the metric dimensions to workable numbers, we constructed two basic
cabinets from ¾" Baltic Birch. All joints were glued and screwed.


Front view of basic Baltic Birch cabinet

Rear view of basic Baltic Birch cabinet


Patterns were made for driver cutout, routing of driver flange cutout
to flush mount driver, and backup mounting for the T-nuts.

Driver cutout is made and inside
of outlet on the rear is painted black.

½" MFD is added to the front leaving a
½" X ½" V groove on three sides of the front.
Bases are made from ¾" plywood, covered by ¼"
Hickory on a MDF core.


Click on image to enlarge
¼" Hickory with a MDF  core is added
to all sides, this leaves a ¾" X ¾" V groove on
three sides of the front, which will be filled by
¾" X ¾" solid oak moldings. Note detail above.

Click on image to enlarge
Front to back and back edges are routed with
a 3/8" X 3/8" groove, which will be filled by
3/8" X 3/8" solid oak moldings. Note detail above.

 

Solid oak moldings are installed, using
clamps and bungee cords.

Drivers are installed for a trial fit.


Click on image to enlarge

Detail of flush mount driver.

Bases are bolted to cabinet with ¼" 20 capscrews
and T-nuts. One inch, half round, solid oak
moldings are glued to edges of the base.


Red oak stain over Hickory, MDF core, covered
by satin Polyurethane.

Rear view of cabinets.


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