Upgrading to Mark 3
INSTRUCTIONS: BOX CHANGES
Cut two 25mm Panels as shown. I used a 76mm Hole Saw
and a Plunge Router set to 4-5mm and carefully following a pencil line that
made before the 76mm hole was cut. The dimensions of the Panels is slightly
smaller than the Cavity dimensions where they are inserted. Note the four
screw holes, these hold the Panel tight in place. Use glue to make sure of
air tight seal. But if glue is used it is not reversible. I painted them
gorgeous acrylic Mat Black. :-)
Note the enlargement of the hole where the Tweeter
terminals need it. Now cut and fit felt pieces as described on the
Construction Page (at the bottom of that page).
Now increase (or adjust) Main
Coupling Capacitor to the Tweeter to 4.5uF (3 x 1.5uF is what I used) or
4.7uF. No other changes to the Crossover is required.