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.

5-Channel (9)

6-Channel (3)

Amplifier Key Features

Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.

Bass Boost (6)

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.

D (9)

AB / D (3)

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.

500–1,000 watts (2)

1,500 watts and up (10)

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.

Up to 500 watts (12)

Series

Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.

SALT Series (6)

SAE Series (3)

SFB Series (3)

Minimum Impedance Unbridged

The lowest impedance the amplifier will handle when it is not bridged.

1 (12)

Minimum Impedance Bridged

The lowest impedance the amplifier will handle when it is bridged.

Not Bridgeable (3)

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.

No (6)

Optional (3)

Yes (3)

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.

Amp Bluetooth Connectivity

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

No (12)

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2100W RMS Class AB/D SAE Series 5-Channel Full Range Car Amplifier

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2100W RMS Class AB/D SAE Series 5-Channel Full Range Car Amplifier

• 80 watts x 4 channel + 225 watts x 1 channel @ 4 ohm
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1700W RMS Class D SALT Series 5-Channel Full Range Car Amplifier

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1700W RMS Class D SALT Series 5-Channel Full Range Car Amplifier

• 125 watts x 4 channel + 480 watts x 1 channel @ 4 ohm
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2000W RMS Class D SALT Series 6-Channel Full Range Car Amplifier

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2000W RMS Class D SALT Series 6-Channel Full Range Car Amplifier

• 100 watts x 2 channel + 150 watts x 2 channel (3&4) @ 4 ohm
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1700W RMS Class D SFB Series 5 Channel Car Amplifier

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1700W RMS Class D SFB Series 5 Channel Car Amplifier

• 200 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
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2000W RMS Class D SALT Series 6-Channel Full Range Car Amplifier

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2000W RMS Class D SALT Series 6-Channel Full Range Car Amplifier

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2100W RMS Class AB/D SAE Series 5-Channel Full Range Car Amplifier

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1000W RMS Class D SFB Series 5 Channel Car Amplifier

• 250 watts x 5 channel + @ 4 ohm
• 500 watts x 5 channel + @ 2 ohm
• Bridged: @ 4 ohm + @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable 5-Channel-Channel Amplifier

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Sundown Audio SFB1800.5D (Open Box, Like New)

1000W RMS Class D SFB Series 5 Channel Car Amplifier

• 250 watts x 5 channel + @ 4 ohm
• 500 watts x 5 channel + @ 2 ohm
• Bridged: @ 4 ohm + @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable 5-Channel-Channel Amplifier

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• 250 watts x 5 channel + @ 4 ohm
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• Total RMS Power: 1000 watts
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Sundown Audio SALT-1700.5 (Open Box, Like New)

1700W RMS Class D SALT Series 5-Channel Full Range Car Amplifier

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1700W RMS Class D SALT Series 5-Channel Full Range Car Amplifier

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2100W RMS Class AB/D SAE Series 5-Channel Full Range Car Amplifier

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2100W RMS Class AB/D SAE Series 5-Channel Full Range Car Amplifier

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