Homemade Leslie cabinet test: Whiter Shade of Pale

Built for less than NZ$200 from a pair of salvaged Leslie rotor assemblies. The cabinet’s nearly full-size (55 x 51 cm, 81 cm high), with louvres cut to shape, trim fitted top and bottom, and the whole thing stained to (approximately) match my organ. The horns are made from a pair of cheap plastic toy horns fixed into a couple of small funnels, screwed to a small round board, and fitted to the pulley of a rotor assembly (with the styrofoam baffle removed). The first assembly used a simple tweeter in the top, which was painfully inefficient (the horns were something like 4-6bB quieter than they should have been) and soon blew out. Replacing it with a compression driver sorted the problem out neatly. The bottom rotor is a standard cheesewheel styrofoam baffle, fed by an upward-facing full-range Wharfedale. Putting the speaker on the bottom made it easier to have the two rotors turning in opposite directions, but meant that the louvres needed to be cut much higher than in a proper Leslie. It also means that an