The center plate assembly housing the three tuned chamber ports.
These are custom flared tubes adjusted for proper length. The support
plate is constructed from Baltic Birch.



As seen, the interior finish is cherry wood as is the outer surface.

The internal perimeter edges around the side passive drivers have been
reduced with a 1/4 roundover bit.



These views show the averaging chamber which feeds the transmission line.
The bottom plate is constructed from Baltic Birch as shown.



As seen, the port tubes are flared at both ends for maximum flow
stability with decreased internal turbulence.

These views show the internal layout from
the side passive port looking outward
through the front driver area.







This view shows the installation of critical cross members
which greatly strengthen the interior structure for
increased control of cabinet resonance.

These views represent the center dispersion plate
assembly. The unit is shown being
temporarily test fitted.



The spheres are the actual compression points
between the plates and the speaker top. These are
very dense hardwood, all mounted directly
to the center plate. The top plate will compress
against these spheres and held tightly
by the threaded rod. The tension is controlled
by this rod which tunes the plates
resonance factor.



The opening from the transmission line can be
seen under the rear of this plate.



This center plate is constructed from MDF with
the hardwood spheres glued directly to it's top
and bottom surfaces. Jam nuts will secure the
height adjustment for each plate along the
threaded rod. The top plate (not shown) is
constructed from solid African Padouk
hardwood. This view is direct from the front
looking back. The black pad forward of
the center plate is where the ribbon element
housing is mounted.

These images show the other housing assembled
and ready for mounting. Note the silver leads exiting
from the bottom. These will be hardwired into the
main harness going directly to the main driver
terminals. The unit is shown lying on its face. Once
mounted, the unit will be calibrated for an angle
of attack set at 5 degrees aft. The unit is hinged for
adjustability. Provisions are allowed for alternate
adjustment.

Nice work RFZ

Another view of  the cabinet shown ready for installation
of the drivers and passive radiators. Note the cork
gasket installed prior to installing driver.

This is the driver set ready for installation. Note
the acoustic foam surrounding the main driver
motor.

This will control  deflections behind the driver by
absorbing reflected waves aft of it. This is a trial basis,
as this application will need to be tested for confirmation
of it's effectiveness.

It may have to be trimmed around the sides,
as this fills in a good portion of the area behind the
driver. If this proves to be excessive, it will be easy
to remove the driver for trimming if found necessary.

These views show the main driver installed as seen
through the side passive ports. The foam and its
surrounding clearance is noted in these images.