Pro Sound Web: It’s amazing to take a look at the latest generation of portable loudspeaker systems in terms of how far they’ve progressed.
When I was with Electro-Voice as product manager for music systems in the mid-1980s, the concentration was on the design and porting of the cabinets, tweaking the components and passive crossovers for efficiency and uniform frequency response, and protecting high-frequency drivers. A big innovation was using a polyswitch in parallel with a resistor for the latter purpose, nicknamed “the PRO circuit.”
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