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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.

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
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Memphis MXA480.4M

480 Watts 4-Channel Xtreme Audio Marine Amplifiers

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480 Watts 4-Channel Xtreme Audio Marine Amplifiers

• RMS Power: 80W x 4 @ 4 ohms, 120W x 4 @ 2 ohms
• Total Peak Power: 480W
• CEA-2006 Compliant/Preamp Outputs/LPF
• DIMENSIONS: 6.1"W x 10.2"L x 2.16"H

Memphis MXA480.4M

480 Watts 4-Channel Xtreme Audio Marine Amplifiers

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$429.95

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480 Watts 4-Channel Xtreme Audio Marine Amplifiers

$429.95

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Belva BAK84

Complete 8 Gauge Amplifier Wiring Kit with 4-Channel RCA Interconnects

$29.99

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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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Memphis MXA6001M

600 Watts Monoblock Xtreme Audio Amplifiers

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600 Watts Monoblock Xtreme Audio Amplifiers

• RMS Power: 250W x 1 @ 4 ohms, 400W x 1 @ 2 ohms, 600W x 1 @ 1 ohm
• Total Peak Power: 600W
• CEA-2006 Compliant/Preamp Outputs/LPF
• DIMENSIONS: 6.1"W x 10.2"L x 2.16"H

Memphis MXA6001M

600 Watts Monoblock Xtreme Audio Amplifiers

In stock

Only 2 Left!

 
$429.95
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2 Special offers
  • FREE 4 Gauge Amp Kit with Purchase!
  • Save 50% off True 4 Gauge Wiring Kit with Select Amps

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600 Watts Monoblock Xtreme Audio Amplifiers

$429.95

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Belva 1.0 Farad Capacitor + Amp Kit

BB1D 1.0 Farad Capacitor + BAK42BK Complete 4 Gauge Amplifier Wiring Kit

$54.99

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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 XLCA2

2 Channel Line Out Converter with xBOOST & 3-year warranty*!

$89.99

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Memphis MXA300.4

300 Watts 4-Channel Xtreme Audio Powersports Amplifiers

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300 Watts 4-Channel Xtreme Audio Powersports Amplifiers

• RMS Power: 65W x 4 @ 4 ohms, 75W x 4 @ 2 ohms
• Total Peak Power: 300W
• CEA-2006 Compliant/Preamp Outputs/LPF
• 3.25"W x 8.625"L x 1.75"H

Memphis MXA300.4

300 Watts 4-Channel Xtreme Audio Powersports Amplifiers

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$249.95

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300 Watts 4-Channel Xtreme Audio Powersports Amplifiers

$249.95

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Stinger SK46101

10 AWG Amplifier Power & Signal Installation Kit

$30.99

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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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Memphis MXA850.5M

850 Watts 5-Channel Xtreme Audio Amplifiers

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850 Watts 5-Channel Xtreme Audio Amplifiers

• RMS Power: 4 ohms: 60 watts x 4 chan. / 175 watts x 1 chan.,2 ohms: 100 watts x 4 chan. / 300 watts x 1 chan., 450W x 1 @ 1 ohm
• Total Peak Power: 850W
• CEA-2006 Compliant/Preamp Outputs/LPF
• DIMENSIONS: 6.10"W x 13.4"L x 2.16"H

Memphis MXA850.5M

850 Watts 5-Channel Xtreme Audio Amplifiers

OUT OF STOCK

 
$539.95

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850 Watts 5-Channel Xtreme Audio Amplifiers

$539.95

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Belva BAK46 6-Channel 4 Gauge Amplifier Installation Kit

Complete 6-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire

$59.99

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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 XIV65 V-Series Interconnect Cable

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$34.99

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