The crossover between the woofer and the coaxial drive-unit (blue trace) appears to be set at 440Hz, with fairly steep high- and low-pass filter slopes.
The slots roll off above their passband, but don't fully support the woofer's midbass output. It peaks at 40Hz, as suggested by the impedance traces in fig.1, which coincides with the frequency of the notch in the woofer's output (red trace), as is to be expected with a traditional reflex tuning.
The blue trace in fig.4 shows the summed output of the four slots to the front and rear of the metal plates on the ME1's sides. Tom Norton speculated that the woofer alignment was aperiodic in nature rather than being a traditional reflex (ported) tuning. Fig.3 TAD Micro Evolution One, cumulative spectral-decay plot calculated from output of accelerometer fastened to center of top panel (MLS driving voltage to speaker, 7.55V measurement bandwidth, 2kHz).
0 kommentar(er)
