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An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
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Pioneer GM-ME400X4

4-Channel Class D 1200 Watt Max Power Bridgeable Amplifier

GM-ME400X4 main
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4-Channel Class D 1200 Watt Max Power Bridgeable Amplifier

• RMS Power: 75W x 4 @ 4 ohms, 120W x 4 @ 2 ohms, 150W x 4 @ 1 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• 8-1/2"W x 9-7/8"L x 2-3/8"H

Pioneer GM-ME400X4

4-Channel Class D 1200 Watt Max Power Bridgeable Amplifier

OUT OF STOCK

$330.00 (9.09% off)
$300.00

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4-Channel Class D 1200 Watt Max Power Bridgeable Amplifier

$300.00

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FREE NVX XMountPro Cell Phone Mount with Select Orders

Spend $200 and use code XMOUNTPRO to get this free!.

$14.99

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NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

$23.99

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NVX XWS1650 Speaker Wire

50 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

$29.99

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Pioneer GM-ME500X1

Class D 1600 Watt Max Power Monoblock Bridgeable Amplifier

GM-ME500X1 main
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Class D 1600 Watt Max Power Monoblock Bridgeable Amplifier

• RMS Power: 300W x 1 @ 4 ohms, 500W x 1 @ 2 ohms, 800W x 1 @ 1 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• 9-7/8"W x 8-1/2"L x 2-3/8"H

Pioneer GM-ME500X1

Class D 1600 Watt Max Power Monoblock Bridgeable Amplifier

OUT OF STOCK

$300.00 (6.67% off)
$280.00

Item Added to Cart

GM-ME500X1 small

Class D 1600 Watt Max Power Monoblock Bridgeable Amplifier

$280.00

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FREE NVX XMountPro Cell Phone Mount with Select Orders

Spend $200 and use code XMOUNTPRO to get this free!.

$14.99

Add
NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

$19.99

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Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

$49.99

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