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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.
The lowest impedance the amplifier will handle when it is not bridged.
The lowest impedance the amplifier will handle when it is bridged.
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.

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.

Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

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.
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Crunch SA-1100.1

1100 Watts Smash Monoblock Subwoofer Car Amplifier

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1100 Watts Smash Monoblock Subwoofer Car Amplifier

• RMS Power: 120W x 1 @ 4 ohms, 195W x 1 @ 2 ohms
• Total Peak Power: 1100W
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4 gauge power and ground wiring is required for installation

Crunch SA-1100.1

1100 Watts Smash Monoblock Subwoofer Car Amplifier

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$129.99 (40.00% off)
$77.99

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1100 Watts Smash Monoblock Subwoofer Car Amplifier

$77.99

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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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NVX XLCA2

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

$89.99

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AudioControl Epicenter-InDash

If you want the best bass possible and a way to measure how loud your system is playing

$249.99

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Crunch SA-2100.1

2100 Watts Smash Monoblock Subwoofer Car Amplifier

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2100 Watts Smash Monoblock Subwoofer Car Amplifier

• RMS Power: 285W x 1 @ 4 ohms, 425W x 1 @ 2 ohms
• Total Peak Power: 2100W
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4 gauge power and ground wiring is required for installation

Crunch SA-2100.1

2100 Watts Smash Monoblock Subwoofer Car Amplifier

In stock

$149.99 (43.34% off)
$84.99

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2100 Watts Smash Monoblock Subwoofer Car Amplifier

$84.99

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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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NVX XLCA2

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

$89.99

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AudioControl Epicenter-InDash

If you want the best bass possible and a way to measure how loud your system is playing

$249.99

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Crunch PX-2025.1D

Crunch 2000 Watts Power X Mono Subwoofer Car Audio Amplifier

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Crunch 2000 Watts Power X Mono Subwoofer Car Audio Amplifier

• Built-in Bass Control
• Speaker Level Inputs
• 2000 Watts x 1 @ 1 Ohm

Crunch PX-2025.1D

Crunch 2000 Watts Power X Mono Subwoofer Car Audio Amplifier

In stock

$199.99 (45.50% off)
$108.99

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Crunch 2000 Watts Power X Mono Subwoofer Car Audio Amplifier

$108.99

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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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NVX XLCA2

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

$89.99

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AudioControl Epicenter-InDash

If you want the best bass possible and a way to measure how loud your system is playing

$249.99

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Crunch PZ-1520.2

1500W Powerzone Series 2 ohm Stable 2-Channel Class-A/B Amplifier

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1500W Powerzone Series 2 ohm Stable 2-Channel Class-A/B Amplifier

• 375 Watts Max x 2 @ 4 ohms
• 750 Watts Max x 2 @ 2 ohms
• 1500 Watts Max x 1 @ 4 ohms, Bridged
• Total Peak Power: 1500 Watts
• Preamp Outputs to Strap to Other Amplifiers
• 0-9dB Bass Boost
• Aluminum Heatsink

Crunch PZ-1520.2

1500W Powerzone Series 2 ohm Stable 2-Channel Class-A/B Amplifier

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$139.99 (35.72% off)
$89.99

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1500W Powerzone Series 2 ohm Stable 2-Channel Class-A/B Amplifier

$89.99

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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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NVX Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

$9.99

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NVX XLCA2

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

$89.99

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Crunch PZ-3020.1D

3000W Max (1500W RMS) Powerzone Series 1-ohm Stable Monoblock Amplifier w/ Bass Knob Included

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3000W Max (1500W RMS) Powerzone Series 1-ohm Stable Monoblock Amplifier w/ Bass Knob Included

• 750 Watts RMS x 1 @ 4 ohms
• 1500 Watts RMS x 1 @ 2 ohms
• 3000 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 3000 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 12 dB Bass Boost
• QTC Heatsink

Crunch PZ-3020.1D

3000W Max (1500W RMS) Powerzone Series 1-ohm Stable Monoblock Amplifier w/ Bass Knob Included

In stock

Only 2 Left!

$199.99 (42.50% off)
$114.99
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  • 15% Off of Belva BB2D 2.0 Farad Capacitor with Purchase!

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3000W Max (1500W RMS) Powerzone Series 1-ohm Stable Monoblock Amplifier w/ Bass Knob Included

$114.99

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NVX XKIT42 100% OFC True 4 Gauge Wiring Kit with RCA Cables and Speaker Wire

The reviews speak for themselves, this is awesome wire with everything you need!

$99.99

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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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Crunch GP-1500.1

1500 Watts Ground Pounder Mono Subwoofer Car Amplifier

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1500 Watts Ground Pounder Mono Subwoofer Car Amplifier

• Variable Electronic Crossover
• Bass Remote Included
• Subsonic Filter
• Switchable Bass Boost

Crunch GP-1500.1

1500 Watts Ground Pounder Mono Subwoofer Car Amplifier

In stock

Only 3 Left!

$149.99 (13.33% off)
$129.99
More info Item page
1 Special offer
  • Save 50% on a 4 Gauge Installation Kit with Purchase!

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1500 Watts Ground Pounder Mono Subwoofer Car Amplifier

$129.99

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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

Add
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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Crunch PZ-2020.2 (PZ20202)

2000W Max Powerzone Series 2 ohm Stable 2 Channel Class-A/B Amplifier

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2000W Max Powerzone Series 2 ohm Stable 2 Channel Class-A/B Amplifier

• 500 Watts Max x 2 @ 4 ohms
• 1000 Watts Max x 2 @ 2 ohms
• 2000 Watts Max x 1 @ 4 ohms, Bridged
• Total Peak Power: 2000 Watts
• High and Low Pass Filters Built In
• 0-9dB Bass Boost
• Aluminum Heatsink

Crunch PZ-2020.2 (PZ20202)

2000W Max Powerzone Series 2 ohm Stable 2 Channel Class-A/B Amplifier

OUT OF STOCK

$169.99 (44.12% off)
$94.99

Item Added to Cart

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2000W Max Powerzone Series 2 ohm Stable 2 Channel Class-A/B Amplifier

$94.99

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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

Add
NVX Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

$9.99

Add
NVX XLCA2

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

$89.99

Add

Don't see the accessory you're looking for?
View all available accessories for the Crunch PZ-2020.2 (PZ20202).
Crunch GP-2000.2

Crunch 2000 Watts Ground Pounder Two Channel Car Audio Amplifier

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Crunch 2000 Watts Ground Pounder Two Channel Car Audio Amplifier

• Variable Electronic Crossover
• Class D Amplifier
• Switchable Bass Boost

Crunch GP-2000.2

Crunch 2000 Watts Ground Pounder Two Channel Car Audio Amplifier

OUT OF STOCK

$109.99 (27.28% off)
$79.99

Item Added to Cart

GP-2000.2 small

Crunch 2000 Watts Ground Pounder Two Channel Car Audio Amplifier

$79.99

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NVX XKIT42 100% OFC True 4 Gauge Wiring Kit with RCA Cables and Speaker Wire

The reviews speak for themselves, this is awesome wire with everything you need!

$99.99

Add
FREE NVX XMountPro Cell Phone Mount with Select Orders

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

$14.99

Add
NVX XLCA2

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

$89.99

Add

Don't see the accessory you're looking for?
View all available accessories for the Crunch GP-2000.2.
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