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Details
Inventors: Rush, James M.;
Assignee:
Primary Examiner: Isen; Forester W.
Assistant Examiner:
Attorney, Agent or Firm: Price, Gess & Ubell

A biamplified speaker system wherein each speaker enclosure contains amplifiers and an electronic crossover network is powered by its own power supply. A preamplified audio signal is fed to each speaker enclosure for reproduction by a tweeter and a pair of bass drivers. The power amplifiers receive their frequency band of equalized signals from the electronic crossover. The power amplifiers utilize a MOSFET power output stage with the MOSFETs bolted directly to the heat sinks. One power amplifier drives the tweeter, another drives the woofer. The electronic crossover utilizes a modified 24-dB/oct design to divide up the preamplified signal into the frequency bands to be supplied to the tweeter and bass drivers, as well as to compensate for the characteristics of the drivers, in order to provide a flat frequency response curve for the entire speaker.

DETAILED DESCRIPTION Each speaker enclosure contains at least a pair of amplifiers and an electronic crossover network along with the audio drivers.
The drivers are a tweeter and a pair of eight-inch cones for midrange and bass reproduction The line level signal (approximately 1 volt) is supplied to the electronic crossover network, which routes the high frequencies to the tweeter and the rest of the signal to the woofers.
These signals are custom equalized to the drivers and power amplifiers to provide a flat overall response curve.
The power amplifiers utilize MOSFET output stages with the MOSFET devices bolted directly to the heat sinks.
The electronic crossover network utilizes a plurality of state variable filters along with frequency compensation circuits selected to complement the drivers.



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