A fellow Audio Circle member recently asked me to construct single board crossovers for a pair of N3 TL towers that he is building in lieu of separate low and high pass filter boards. The boards were cut from scrap pieces of 1/4" thick Pergo flooring that I had in my shop and are 4-1/2" wide x 9-3/4"long. The parts are secured to the board with hot glue and plastic wire ties. Also, each board is secured to the interior cabinet walls with six(6) No. 8 x 1" long Hex Head sheet metal screws and 1/4" thick square vinyl bumpers between the board and the cabinet wall. Best location for the crossover mounting is on the inside rear wall behind the lower woofer If the port opening is located on the front of the cabinet the board can be mounted on the inside front baffle board below the lower woofer. The following picture shows how it looks:
