My room size is less than 250 ft2 (22m2) and I need a smaller speaker. How can I modify the PHOENIX design?
A2 – You could eliminate one of the 8″ drivers and make the main panel only 16″ tall. This will sacrifice 6 dB in acoustic output capability for the same non-linear distortion level. The gain of the midrange channel in the crossover/eq needs to be increased 6 dB. I would not recommend to also go to a single woofer, i.e. 6 dB less bass output, because subjectively this is a much more significant reduction in output capability (observe the close spacing of the equal loudness contours at low frequencies, Fletcher-Munson). The reduced height main panel would also make for a high performance center or surround speaker with very uniform and smooth off-axis response, but for distortion should not be pushed below 100 Hz. A second alternative is to eliminate the woofers all together and to extend the main panel response from the present 100 Hz down to 50 Hz. To maintain the same SPL down to 50 Hz, the 8″ drivers must move with 4x the excursion of 100 Hz. Thus, for the same distortion, output is
