Although the "Petit Orgue" cabinet consists of many individual parts, it is, in fact, easy to build because all the parts have only 90° angles and there are no bevels required. The cabinet consists of two halves which are held together by 4 threaded rods after the drivers have been fitted. The split construction is necessary because it would not be possible to fit the woofers inside a closed cabinet. To ensure the two halves are properly positioned relative to each other, we recommend wooden plugs or a similar locating system.
Initially, the construction of the two halves is identical. Glue the outer spacers and rear wall to the outer wall which has the cutout in it for the magnets. To this, glue the inner wall with the large cutouts for the woofer baskets. This completes part 2 of the cabinet. On part 1, we now glue the baffle and the rear wall for the full-range drivers in place and attach the inner spacers, which completes this part. If you intend to fit the full-rangedrivers from the back, as originally planned, we recommend you use screw-in nuts. These have to be screwed in before the baffle is glued in place because, afterwards, it is hardly possible to access them. Fitting the drivers from behind is mainly for appearance's sake. If you do not feel up to milling the oval cutouts exactly, you can also fit the drivers from the outside. In this case, however, we would recommend you fit a grille frame with acoustic fabric because the SL 713 - 4 Ohm 's basket is not particularly attractive. To enable the two woofers to be interconnected, it is necessary to drill holes to connect the two halves of the cabinet. For the full-range drivers, it is only necessary to drill a hole in the rear wall of the full-range enclosure.
Since there is no room inside the cabinet for the crossover, it has to be placed outside. There are no limits to your imagination. You could make a wooden base for the speaker and hide it there or just use a wooden board and mount it on that so that it is visible. There is also hardly room for terminal connections, so you will need to improvise here, too. The gold-plated screw terminals on the BT 95/75 (or from the high-end terminal) can be unscrewed and fitted in the rear wall, which is an attractive solution in connection with the wood panelling. Alternatively, the wires can be fed straight from the driver to the crossover without an intermediate terminal. It has been found to be advantageous to solder the wires between the full-range drivers with them outside the cabinet, and to fit them inside the cabinet afterwards. Soldering the wires on with the drivers already fitted would be far more complicated than outside the cabinet side by side on the table.
Hint: After the whole construction has been glued together, tie the two halves firmly using the threaded rods but before you fit the drivers. At this stage it is possible to sand off any irregularities using an orbital sander so that the two halves match perfectly.
Roll up half a mat of damping for each of the full-range driver enclosuresand push it inside the cabinet.
No damping is required in the woofer enclosures.