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2. Vehicle audio - Wikipedia

   en.wikipedia.org/wiki/Vehicle_audio

   Mobile audio power amplifiers. Amplifiers increase the power level of audio signals. Some head units have built-in stereo amplifiers. Other car audio systems use a separate stand-alone amplifier. Every amplifier has a rated power level sometimes noted on the head unit with the built-in amplifier, or on the label of a stand-alone unit.

3. Automotive battery - Wikipedia

   en.wikipedia.org/wiki/Automotive_battery

   A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle.. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually propels the vehicle.

4. List of car audio manufacturers and brands - Wikipedia

   en.wikipedia.org/wiki/List_of_car_audio...

   This list of car audio manufacturers and brands comprises brand labels and manufacturers of both original equipment manufacturer (OEM) and after-market products generally related to in-car entertainment that already have articles within Wikipedia. While components sold by these companies have much in common with other audio applications or may ...

5. All American Five - Wikipedia

   en.wikipedia.org/wiki/All_American_Five

   IF amplifier: 1U4; Detector and first audio amplifier: 1U5; Audio power output: 3V4; Rectifier: 35W4, 117Z3, or a selenium rectifier; This version used a 7.5 V A battery and a 90 V B battery. Note that the A battery did not need to heat the rectifier tube because, when operating from the batteries, the rectifier was not needed.

6. Class-D amplifier - Wikipedia

   en.wikipedia.org/wiki/Class-D_amplifier

   Class-D amplifiers work by generating a train of rectangular pulses of fixed amplitude but varying width and separation. This modulation represents the amplitude variations of the analog audio input signal. In some implementations, the pulses are synchronized with an incoming digital audio signal removing the necessity to convert the signal to ...

7. Alpine Electronics - Wikipedia

   en.wikipedia.org/wiki/Alpine_Electronics

   The black Buick won the Alpine Car Audio Nationals II Pro Unlimited (751 watts and up) division in 1988, and IASCA's Pro unlimited title in 1989, 1990, and 1991 before being retired by its owner, Richard Clark. Its sound system is composed of five model 3545 amplifiers and the model 7909 head unit.

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Constant-voltage speaker system - Wikipedia

   en.wikipedia.org/wiki/Constant-voltage_speaker...

   High-voltage audio amplifiers have almost become a one chip solution. For example, National Semiconductor 's LME49810 [ 7 ] (and similar products LME49811 [ 8 ] and LME49830 [ 9 ] ) can output 100 V peak to peak signals, but have relatively low current output, so a standard circuit includes a Darlington or FET discrete output stage.