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Building instructions

If the speakers are likely to be transported frequently, it is advisable to make the cabinets out of multilayer board with a thickness of just 15 mm. This will keep the speakers very light and yet sturdy in case they are knocked in use. The final surface could then be either non-scratching 2-component paint or even carpet. Corner reinforcers are useful for stacking or just to protect the corners. In the drawing, we have shown the ST 77 terminals. The more professional solution, however, would be a terminal plate with two XLR or Speakon sockets. This way the signals can be passed through to other speakers. Of course, for transport purposes, carrying handles in the sides and a flange in the base for a stand are essential extras. The front baffle is moved 30 mm back, in order to protect the driver. Additionally, a grille can also be fitted to the woofer (the grille and other accessories mentioned are all available in musician's shops). If you do not have a circle cutter for the port and the jig-saw solution does not provide the required quality of openings, it is also possible to use a BR 14.70 tube with a length of just 15 mm. In this way, you just need the tube flange to give it a finished appearance. 

Inner damping

The damping simply uses four mats of damping material placed in the cabinet behind the woofer. 
Component parts list for 1 box
2 piece
8 Ohm
1 piece
Terminal: ST 77 1 piece
Bass reflex tube: BR 14.70  OR NOTING
(length: 1,5 cm)
1 piece
Damping material:   2 bags
Wood screws: 4 x 20 mm 8 pieces
Countersunk screws: 3,5 x 25 mm 4 pieces
  3,5 x 19 mm 4 pieces
Special wood screws: 5 x 30 mm 8 pieces
Cable: 2 x 1,5 mm2 2,5 m
Cabinet parts list for 1 box
Parts Size (mm) Quantity
Material: 15 mm plywood
Front and rear panel 450 x 570 2
Top and bottom panel 450 x 420 2
Side panel 600 x 420 2
Brace 150 x 450 1

MB 115/H