The Basics: Car Amplifiers
For the easiest and typically least expensive installation, look for a exclusive amplifier to ability all the speakers in a car system. This would be the number of channels listed on the amp, as a not general chase is only adapted of powering one speaker. Moreover, double O for an amplifier that contains its own crossovers; these circuits split the classical frequencies so (for example) the highs go to the front speakers while the lows go the back speakers. This helps maximize power delivery to the speakers and improve sound. When shopping, look at the instrument an amplifier lets you determination these crossovers. Some custom rotary controls, while others have less accessible inset controls requiring a screwdriver for adjustment.
You could consider amplifiers with one, two, or four channels, but you'll charge a gouge for each speaker; this presently increases the complexity and bad news of the system. Also, if you'll be adding a subwoofer for killer low-ends sound, you'll regularly need a separate amplifier. Remember, every speaker will use one channel of amplification. Four-channel amps are, by far, the most popular.
Amplifiers don't really come with a massive array of features, but there are a few to consider. Soft-start circuitry eliminates the thumps and thuds that can be annoying and potentially prejudicial to car speakers. Depending on your application, the character of speaker-level and line-level outputs and inputs obligation to be considered. Make sure you have enough for the setup you are currently installing, while leaving range for at least one near upgrade.
Amps generate a significant flock of fever that affects their efficiency. Jillion methods of dissipating this cold are used--everything from metal fins that design extended surface area for waft cooling to a few systems that truly bag liquid coolant to keep the temperature down. Read reviews and specs to choose between hype and facts.