# US 5,349,301 A · Multiple amplifier system for a car

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,349,301 A
- Document ID: US5349301A
- Status: Granted
- Kind: A
- Application number: 08/149,272
- Filed: 1993-11-09
- Granted: 1994-09-20
- Earliest claimed: 1992-11-10
- Assignees: Pioneer Electronic Corporation; Tohoku Pioneer Electronic Corporation
- Inventors: Hiroshi Kaiwa
- Web page: https://patentgrep.com/patent/US5349301A

## CPC

- H04R 3/14: Cross-over networks
- H03F 3/68: Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics {(power amplifiers using a combination of several semiconductor amplifiers H03F3/211; combinations of amplifiers using coupling networks with distributed constants H03F3/602)}
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- H03F: AMPLIFIERS

## Abstract

A multiple amplifier system comprises a sound source, a power source, an electronic crossover network for dividing an audio signal from the sound source into a plurality of frequency ranges. Each of the divided audio signal is amplified by an individual power amplifier and fed to a corresponding speaker. A superposing circuit is connected to the sound source and the power source for superposing the audio signal from the sound source and power from the power source. The superposed signal is applied to the electronic crossover network through a lead.

## Claims

### Claim 1

A multiple amplifier system for a car having a sound source, a power source, an electronic crossover network for dividing an audio signal from the sound source into a plurality of frequency ranges, a plurality of power amplifiers for separately amplifying the divided audio signals, and a plurality of speakers each of which is connected to the corresponding power amplifier, the system comprising:
a superposing circuit connected to the sound source and the power source for superposing the audio signal from the sound source and power from the power source on an output; and
lead means connecting the output of the superposing circuit to the electronic crossover network.

### Claim 2 (depends on 1)

The system according to claim 1 wherein:
the lead means includes filters for eliminating fluctuation of the power.

### Claim 3 (depends on 2)

The system according to claim 2 further comprising means connecting power output from the filters to the power amplifiers.