Buying a good car amplifier begins in knowing the standard specifications.Car amplifiers are designed to take low-level signal from a source unit (radio/portable player/head unit) and transform it to a high-level signal driving to loudspeakers.Depending on its features, power output, and quality, a car amplifiers will cost.
In-dash stereo are proven limited in terms of performace thought it works better when plug in to external power and set to highest volume levels.But if you need to power a subwoofer, a separate amp is required to give lot more power compared to which in-dash delivers.
A mono amplifier is perfect for powering a subwoofer. A 2 or 4 channel amp is good for component speaker systems or full range while a 4, 5, or 6-channel amp is needed to handle a combination of subwoofers and full-range speakers. Amplifiers are easy to add to any factory-installed or brand name receiver.
Here are the important checklist when buying a Car Amplifier:
*Check your car speaker and amplifier-Input levels,RMS and peak power rating at least match or compatible. It should be 70.7% of maximum RMS while the peak power usually takes 90 decibel range.
*Consider the ohms ratings as well-the standard is 4 ohms
*Choose A Car Amplifier with a good bass(low-pass filter) or with good treble(high-pass filter)
*Choose multichannel car amplifier or minimum of two-Mono are reserved for subwoofers
* What car amplifier classes to choose?
1. Class A-least efficient in terms of power consumption but has a better sound compare to A/B
2.Class A/B- is the most common in the car audio market, its more efficient than Class A
3.Class D - are usually reserved for high power subwoofer amplifiers and can reach efficiencies in the 80%+ range.Less heat and use less current.
* Check how much it will cost if you need to upgrade your car electrical wirings.
*Does the amplifier have remote controls, voltage monitors, control center
* Compare two or three car amplifiers of your choices and determine the physical size you need.List down the specific dimension or get the old car amps model before going to the car audio shop.
*Extra features like built-in crossovers and pre-amps output are also beneficial
*Stick to known car amps manufacturers like
-Keenwood
-Kicker
-Alpine
-Audiobahn
-MTX
-Phoenix Gold
-Rockford Frosgate
-Mclaren
-Lanzar
-Pioneer
-and Boss, where you can get the most quality car audio equipments with customer support and warranty.

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