Just for fun I ran the woofer only in the Model 15 box. Horn and crossover plate installed. Taped off the driver mount to horn. The other speaker has the same woofer(Altec 412c} but in the smaller Heathkit AE-40 cabinet. Turned the eWave section down in the AE-40. Sounds much happier in the larger 15 cabinet. The bi-flex plays higher than you would expect. The center of the bi-flex measures 5 1/2 inches. Anyone know when a 5 1/2 inch speaker starts to "Beam" ? Graph is unweighted pink noise taken close {8 inches}with a Dayton mic on my phone. The graph is always sloped when unweighted . The second graph is more accurate .
Attachments
Last edited: