Patent ID: 9294843
Filing Date: 2016-03-22
CPC Classification: H04R

Claim Text:
1. A multimedia sound system with digital audio interface, comprising: a computer or a game console having one or more interfaces comprising at least one of a Universal Serial Bus (USB) interface, an Institute of Electrical and Electronics Engineers 1394 (IEEE1394) interface, a coaxial cable interface, or a fiber-optic interface; one or more 2.0 channel external sound cards to connect the one or more interfaces with one or more corresponding D type or T type Integrated Circuit chips (IC chips) of an audio frequency power amplifier; a pair of channel speakers comprising a left channel speaker and a right channel speaker; one or more control and protection circuits to protect the one or more 2.0 channel external sound cards, the audio frequency power amplifier, the one or more IC chips, and/or the pair of channel speakers, wherein: the one or more 2.0 channel external sound cards, the one or more IC chips, one or more elements of a Surface Mount Device circuit (SMD circuit) that is coupled to the one or more IC chips, one or more elements of an integrated Complementary Metal Oxide Semiconductor circuit (“CMOS circuit”) that is integrated with the one or more IC chips, a Light Emitting Diode (LED) signal light to indicate working conditions of the one or more external sound cards, and/or a volume control device of the audio power amplifier are mounted on a Printed Circuit Block (PCB) or connected to the PCB through wires and connectors; the PCB board is positioned inside the left channel speaker or on at least one support of the pair of channel speakers; the LED signal light and the volume control device are fastened to a speaker panel of the left channel speaker or on at least one support of the pair of channel speakers; the PCB board or a speaker panel of the left channel speaker includes a power socket that matches the one or more interfaces and connects to the computer or the game console through at least one of: a plug of an extension cable of the one or more interfaces or directly to the one or more interfaces of the computer or the game console; a panel of the right channel speaker is mounted with an audio frequency power socket; an audio frequency cable connects the left channel speaker and the right channel speaker to form a 2.0 channel sound system; each of the one or more 2.0 channel external sound cards has at least one stereo Digital to Analog Converter (DAC) of simplex 16 to approximately 48 bits; the at least one DAC and the one or more IC chips are powered by a 5 V power supply from the one or more interfaces, and each of the at least one DAC and the one or more IC chips has a set of filtering and energy storage electrolytic capacitors that are connected in parallel and located closest to each of the respective input pins of the at least one DAC and the one or more IC chips; a specified lower limit of a rated working voltage of the audio power amplifier is 1.1 V to approximately 2.7 V lower than a specified lower limit of a rated working voltage of the at least one DAC so that transient working voltages of the audio power amplifier and the at least one DAC do not exceed the lower limit of the rated working voltage of the audio power amplifier when 2.0 channel sound system outputs a large dynamic low audio signal of sufficiently large width; the specified rated working voltage of the audio power amplifier is less than or equal to 5.2 VDC or DC 8-15V, and the rated continuous power of each channel of the audio power amplifier is less than or equal to 2 W; at least one of the left channel speaker or the right channel speaker comprises at least one multi magnetic gap and at least one multi coil that each have one or more resistor loads; the left channel speaker and/or the right channel speaker that has the at least one multi magnetic gap and the at least one multi coil is equipped with a cone-shaped or concave diaphragm that has a caliber that is less than or equal to 7 inches; and the diaphragm of the left channel speaker and/or the right channel speaker that has the at least one multi magnetic gap and the at least one multi coil has a central hole with the diameter of 26 mm to 33 mm such that the left channel speaker and/or the right channel speaker that has the at least one multi magnetic gap and the at least one multi coil is a full frequency band speaker having two single-point coaxial sound production, wherein an inductance generated by the multi magnetic gaps and the multi coils is offset by a phase angle of 180 degrees due to a counter electromotive force that results from a reciprocating motion.