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Amplifier Class

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.
Number of Channels
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 Output
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.
Total Peak Power Output
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.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
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.
Preamp Outputs
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.
Built-in Crossover

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
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.
Maximum Input Gauge Size
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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Hertz HCP2 + Belva BAK42

400W Class AB 2-Channel Car Audio Subwoofer Amplifier + Belva 4 Gauge Amp Wiring kit

HCP 2, BAK42 big
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Hertz HCP2 + Belva BAK42

400W Class AB 2-Channel Car Audio Subwoofer Amplifier + Belva 4 Gauge Amp Wiring kit

• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 8.46" x 7.48" x 1.97"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
170
List price $279.99
-20% $224.48

In stock

Add to Cart

• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 8.46" x 7.48" x 1.97"

Hertz SP 4.900 with NVX 4 Gauge Amp Kit

900W RMS SPL Show Series Class-D 4-channel Amplifier

SP4900_XKIT44 big
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Hertz SP 4.900 with NVX 4 Gauge Amp Kit

900W RMS SPL Show Series Class-D 4-channel Amplifier

• 160 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 900 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
81
List price $955.99
-27% $699.99

In stock

Add to Cart

• 160 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 900 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz SP 4.500 with NVX 8 Gauge Amp Kit

600W RMS SPL Show Series Class-D 4-3- 2-Channel Amplifier

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Hertz SP 4.500 with NVX 8 Gauge Amp Kit

600W RMS SPL Show Series Class-D 4-3- 2-Channel Amplifier

• 90 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Marine Amplifier
• Includes Amplifier Wiring Kit

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39
List price $607.99
-26% $449.99

In stock

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• 90 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Marine Amplifier
• Includes Amplifier Wiring Kit

Hertz HCP2X with NVX 8 Gauge Amp Kit

800W Class AB 2-Channel Car Subwoofer Amplifier

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Hertz HCP2X with NVX 8 Gauge Amp Kit

800W Class AB 2-Channel Car Subwoofer Amplifier

• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 12.40" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
60
List price $420.99
-15% $355.98

In stock

Only 1 Left!

Add to Cart

• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 12.40" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

Hertz HCP 1MDK with NVX 4 Gauge Amp Kit

2480 Peak Monoblock Class-D Marine Car Audio Amplifier

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Hertz HCP 1MDK with NVX 4 Gauge Amp Kit

2480 Peak Monoblock Class-D Marine Car Audio Amplifier

• 600 watts x 1 channel @ 4 ohm
• 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 1240 watts
• Corrosion Protection
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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124
List price $963.99
-14% $826.98

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Only 1 Left!

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• 600 watts x 1 channel @ 4 ohm
• 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 1240 watts
• Corrosion Protection
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Hertz HCP 4M with Free Premium NVX 4 Gauge Amp Kit

Class-D 4-Channel 2 Ohms Marine Stereo Amplifier

HCP4M, XKIT44 big
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Hertz HCP 4M with Free Premium NVX 4 Gauge Amp Kit

Class-D 4-Channel 2 Ohms Marine Stereo Amplifier

• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
80
List price $625.99
-18% $514.16

In stock

Only 1 Left!

Add to Cart

• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

Hertz Venezia V4 Compact with NVX 4 Gauge Amp Kit

760W RMS Venezia Series Class-D 4-Channel Compact Marine Amplifier

VENCOMPACTV4C_XKIT44 big
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Hertz Venezia V4 Compact with NVX 4 Gauge Amp Kit

760W RMS Venezia Series Class-D 4-Channel Compact Marine Amplifier

• 110 watts x 4 channel @ 4 ohm
• 190 watts x 4 channel @ 2 ohm
• Total RMS Power: 760 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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80
List price $955.99
-27% $699.99

Available

Ships in 10-14 days

Add to Cart

• 110 watts x 4 channel @ 4 ohm
• 190 watts x 4 channel @ 2 ohm
• Total RMS Power: 760 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz HCP5D with NVX 8 Gauge Amp Kit

Class D 5-Channel Car Subwoofer Amplifier

HCP5D_XKIT86 big
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Hertz HCP5D with NVX 8 Gauge Amp Kit

Class D 5-Channel Car Subwoofer Amplifier

• 150 Watts RMS x 4 + 200 Watts x 1 @ 4 ohm
• 250 Watts RMS x 4 + 300 Watts x 1 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 13.58" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
82
List price $726.98
-15% $615.07

Available

Ships in 10-14 days

Add to Cart

• 150 Watts RMS x 4 + 200 Watts x 1 @ 4 ohm
• 250 Watts RMS x 4 + 300 Watts x 1 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 13.58" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

Hertz HMP 1D with NVX 8 Gauge Amp Kit

300W RMS HMP Series Monoblock Class D 2-Ohm Marine/Powersports/Motorcycle Amplifier

HMP1D_XKIT82 big
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Hertz HMP 1D with NVX 8 Gauge Amp Kit

300W RMS HMP Series Monoblock Class D 2-Ohm Marine/Powersports/Motorcycle Amplifier

• 180 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Water Jet Tested
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
60
List price $510.99
-26% $379.99

Available

Ships in 10-14 days

Add to Cart

• 180 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Water Jet Tested
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Hertz HMD1 with NVX 8 Gauge Amp Kit

1000W RMS Monoblock 1-Ohm Class D Marine Amplifier

HMD1_XKIT82 big
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Hertz HMD1 with NVX 8 Gauge Amp Kit

1000W RMS Monoblock 1-Ohm Class D Marine Amplifier

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Corrosion Resistant
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
60
List price $1235.99
-19% $999.99

Available

Ships in 10-14 days

Add to Cart

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Corrosion Resistant
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Hertz ML Power 5 with NVX 4 Gauge Amp Kit

950W RMS Mille Series Class-D 5-Channel Amplifier

MLPOWER5_XKIT46 big
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Hertz ML Power 5 with NVX 4 Gauge Amp Kit

950W RMS Mille Series Class-D 5-Channel Amplifier

• 70 watts x 4 channel + 380 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 550 watts x 1 channel @ 2 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
45
List price $1239.99
-29% $879.99

Available

Ships in 10-14 days

Add to Cart

• 70 watts x 4 channel + 380 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 550 watts x 1 channel @ 2 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz Venezia V4 with NVX 4 Gauge Amp Kit

1160W RMS Venezia Series Class-D 4-Channel Marine Amplifier

veneziav4_xkit44 big
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Hertz Venezia V4 with NVX 4 Gauge Amp Kit

1160W RMS Venezia Series Class-D 4-Channel Marine Amplifier

• 160 watts x 4 channel @ 4 ohm
• 290 watts x 4 channel @ 2 ohm
• Total RMS Power: 1160 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
80
List price $1410.99
-22% $1,099.99

Available

Ships in 10-14 days

Add to Cart

• 160 watts x 4 channel @ 4 ohm
• 290 watts x 4 channel @ 2 ohm
• Total RMS Power: 1160 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz Venezia V1 with NVX 4 Gauge Amp Kit

1260W RMS Venezia Series Class-D Monoblock Marine Amplifier

VENEZIAV1_XKIT42 big
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Hertz Venezia V1 with NVX 4 Gauge Amp Kit

1260W RMS Venezia Series Class-D Monoblock Marine Amplifier

• 700 watts x 1 channel @ 4 ohm
• 1260 watts x 1 channel @ 2 ohm
• 1260 watts x 1 channel @ 1 ohm
• Total RMS Power: 1260 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.
124
List price $1283.99
-22% $999.99

In stock.

Add to Cart

• 700 watts x 1 channel @ 4 ohm
• 1260 watts x 1 channel @ 2 ohm
• 1260 watts x 1 channel @ 1 ohm
• Total RMS Power: 1260 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

 
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