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Typical loads used are 8 and 4 ohms per channel; many amplifiers used in professional audio are also specified at 2 ohms. Considerably more power can be delivered if distortion is allowed to increase; some manufacturers quote maximum power at a higher distortion, like 10%, making their equipment appear more powerful than if measured at an ...
Meridian Audio (optional extras on Jaguars and Range Rovers, and standard on McLarens) Milbert Amplifiers (Vacuum tube car audio equipment) MTX Audio; Monster Cable (manufacturers speaker wiring) Nakamichi (also an OEM option for Lexus vehicles) Naim (specially for 'Bentley' a British brand) Orion
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. Coaxial speakers: These are the most common type of car speakers and are often factory-installed.
The voltage on a speaker wire depends on amplifier power; for a 100-watt-per-channel amplifier, the voltage will be about 30 volts RMS. At such voltage, a 1% loss will occur at 0.3 ohms or more of inductive reactance. Therefore, to keep audible (up to 20,000 Hz) losses below 1%, the total inductance in the cabling must be kept below about 2 μH.
Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.
In 1959, Harman Kardon marketed the Citation II, an early ultra wideband stereophonic tube amplifier. It featured 60 watts/channel output with a frequency response of 18–60,000 Hz at 20 watt output. [20] The company promoted their philosophy of designing high fidelity sound using amplifiers that provided widest possible audio bandwidth.
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