is the tuning frequency of the ports, as expected from fig.1. The ports, too, behave similarly, and the sum of their outputs (fig.4, blue trace) sharply peaks between 40 and 90Hz, with a generally clean rolloff above that region. Higher...
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as well as meaningful output extending to just below 40Hz. I would be impressed with the PSB’s impact and slam fortwiceits price of $349/pair -- it seemed capable of almost all the extension of Definitive Technology’s Demand D9 minimonitor ($749/pair), which I reviewed last year (...
Sidebar 3: Measurements I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the PSB Alpha P5's frequency response in the farfield and an Earthworks QTC-40 mike for the nearfield responses. Because the tweeter is mounted at the b
When I plugged both ports, however, the response remained within ±2.5dB limits (with 1/6-octave smoothing) down to 40Hz, and rolled off at about 12dB/octave below that (lower black trace in fig.1). The response now lacked the extraoomphfrom the bumps below 50Hz that it had with onl...
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Sidebar 3: Measurements All the measurements were performed with the speaker's grille in place. Despite its small size, the PSB Alpha B1 had an estimated voltage sensitivity of 87dB(B)/2.83V/m, which is right on the average of the speakers I have measure