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1981 GMC G2500

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Single, 1-channel monoblock sub amplifiers for when you add a sub

Overview Upgrade your Stereo Upgrade your Speakers Add an Amplifier Digital Sound Processors Audio Installation & Accessories Dads & Grads Sale

Amplifiers for Powering a Sub for 1981 GMC G2500

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

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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.
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.
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.
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.
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.
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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.
Sonic Certified Amplifier
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.
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.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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DS18 FRP-5K/RD

5000W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Red)

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DS18 FRP-5K/RD

5000W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Red)

• 1500 watts x 1 channel @ 4 ohm
• 2900 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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American Bass VFL REBEL 3000.1

3000W RMS Class D VFL Rebel Series Monoblock Full Range Amplifier

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American Bass VFL REBEL 3000.1

3000W RMS Class D VFL Rebel Series Monoblock Full Range Amplifier

• 980 watts x 1 channel @ 4 ohm
• 1905 watts x 1 channel @ 2 ohm
• 3000 watts x 1 channel @ 1 ohm
• Total RMS Power: 3000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Clarion XC2110

400W Peak (300W RMS) Class D XC Series Monoblock Marine Amplifier

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Clarion XC2110

400W Peak (300W RMS) Class D XC Series Monoblock Marine Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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MB Quart DA2-600.1D

600W Peak Class D Discus Series Monoblock Marine and Powersports Amplifier

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MB Quart DA2-600.1D

600W Peak Class D Discus Series Monoblock Marine and Powersports Amplifier

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

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DS18 Hydro NXL-X1000.1D

2000W Peak Class D HYDRO Series Monoblock Marine and Powersports Subwoofer Amplifier

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DS18 Hydro NXL-X1000.1D

2000W Peak Class D HYDRO Series Monoblock Marine and Powersports Subwoofer Amplifier

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• IPX6 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier

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• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• IPX6 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier

Belva BXA15001 (Open Box, Great)

1500W Peak BX-Series Class-AB Monoblock Car Amplifier with Bass Remote

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Belva BXA15001 (Open Box, Great)

1500W Peak BX-Series Class-AB Monoblock Car Amplifier with Bass Remote

• 750 watts x 1 channel @ 4 ohm
• 1500 watts x 1 channel @ 2 ohm
• Total Peak Power: 1500 watts
• Class A/B 2 ohm Stable Monoblock

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DS18 FRP-2.5K/BL

2500W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Blue)

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DS18 FRP-2.5K/BL

2500W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Blue)

• 700 watts x 1 channel @ 4 ohm
• 1300 watts x 1 channel @ 2 ohm
• 2500 watts x 1 channel @ 1 ohm
• Total RMS Power: 2500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Cerwin-Vega VCU81

600W RMS Class D Vega Series Monoblock Car Amplifier with Bass Remote

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Cerwin-Vega VCU81

600W RMS Class D Vega Series Monoblock Car Amplifier with Bass Remote

• 240 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Belva BXD4K (Open Box, Good)

4000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

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Belva BXD4K (Open Box, Good)

4000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

• 1000 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 4000 watts x 1 channel @ 1 ohm
• Total Peak Power: 4000 watts
• Class D 1 ohm Stable Monoblock

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• 1000 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 4000 watts x 1 channel @ 1 ohm
• Total Peak Power: 4000 watts
• Class D 1 ohm Stable Monoblock

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American Bass VFL Comp 3K (VFLCOMP-3K)

3000W RMS Class D VFL Comp Series Monoblock Car Amplifier (with Bass Remote)

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American Bass VFL Comp 3K (VFLCOMP-3K)

3000W RMS Class D VFL Comp Series Monoblock Car Amplifier (with Bass Remote)

• Total RMS Power: 2900 watts
• RMS Power: 2900 watts x 1 channel @ 1 ohm
• Class D 1 ohm Stable Monoblock Amplifier

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DS18 SXE-1500.1D/RD

1500W Peak (500W RMS) Class D SXE Series Monoblock Car Amplifier with Bass Remote (Red)

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DS18 SXE-1500.1D/RD

1500W Peak (500W RMS) Class D SXE Series Monoblock Car Amplifier with Bass Remote (Red)

• 200 watts x 1 channel @ 4 ohm
• 350 watts x 1 channel @ 2 ohm
• 500 watts x 1 channel @ 1 ohm
• Total RMS Power: 500 watts
• Class D Stable Monoblock Amplifier

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Cerwin Vega B51

1000W Peak (500W RMS) Class D Stealth Bomber Series Monoblock Car Amplifier with Bass Remote

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Cerwin Vega B51

1000W Peak (500W RMS) Class D Stealth Bomber Series Monoblock Car Amplifier with Bass Remote

• 175 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier

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DS18 EXL-P2000X1D

2000W RMS Class D EXL Power Series Monoblock Car Amplifier with Bass Remote

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DS18 EXL-P2000X1D

2000W RMS Class D EXL Power Series Monoblock Car Amplifier with Bass Remote

• 500 Watts x 1 @ 4 ohm
• 1000 Watts x 1 @ 2 ohm
• Total RMS Power: 1000 Watts
• Class D 2-Ohm Stable Monoblock Amplifier

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JBL MA600 (JBLMA600AM)

1200W Peak (600W RMS) Class D MA Series Monoblock Marine Amplifier with Bass Remote

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JBL MA600 (JBLMA600AM)

1200W Peak (600W RMS) Class D MA Series Monoblock Marine Amplifier with Bass Remote

• 320 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

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American Bass Godfather 3500.1D (GF-3500.1D)

3047W RMS Class D Godfather Series Monoblock Car Amplifier

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American Bass Godfather 3500.1D (GF-3500.1D)

3047W RMS Class D Godfather Series Monoblock Car Amplifier

• 1540 watts x 1 channel @ 4 ohm
• 2280 watts x 1 channel @ 2 ohm
• Total RMS Power: 3047 watts
• Class D 1 ohm Stable Monoblock Amplifier

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DS18 FRP-8K/RD

9000W Peak (8000W RMS) Class D FRP Series Monoblock Amplifier with Bass Remote (Red)

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DS18 FRP-8K/RD

9000W Peak (8000W RMS) Class D FRP Series Monoblock Amplifier with Bass Remote (Red)

• 2500 watts x 1 channel @ 4 ohm
• 5000 watts x 1 channel @ 2 ohm
• 8000 watts x 1 channel @ 1 ohm
• Total RMS Power: 8000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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DS18 FRP-8K/TI

9000W Peak (8000W RMS) Class D FRP Series Monoblock Amplifier with Bass Remote (Titanium)

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DS18 FRP-8K/TI

9000W Peak (8000W RMS) Class D FRP Series Monoblock Amplifier with Bass Remote (Titanium)

• 2500 watts x 1 channel @ 4 ohm
• 5000 watts x 1 channel @ 2 ohm
• 8000 watts x 1 channel @ 1 ohm
• Total RMS Power: 8000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Cerwin Vega SRPM1000.1DW

1000W RMS Class D Stroke RPM Series Monoblock Marine Amplifier with Bass Remote (White)

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Cerwin Vega SRPM1000.1DW

1000W RMS Class D Stroke RPM Series Monoblock Marine Amplifier with Bass Remote (White)

• 400 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
• Class D 1 ohm Stable Monoblock Amplifier

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List price $719.99
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Diamond Audio HX1600.1D

1600W RMS Class D Hex Series Monoblock Car Amplifier with Bass Remote

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Diamond Audio HX1600.1D

1600W RMS Class D Hex Series Monoblock Car Amplifier with Bass Remote

• 700 watts x 1 channel @ 4 ohm
• 1150 watts x 1 channel @ 2 ohm
• 1600 watts x 1 channel @ 1 ohm
• Total RMS Power: 1600 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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List price $959.99
$949.99

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Cerwin-Vega XED8001D

1100W Peak (800W RMS) Class D XED Series Monoblock Car Amplifier with Bass Remote

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Cerwin-Vega XED8001D

1100W Peak (800W RMS) Class D XED Series Monoblock Car Amplifier with Bass Remote

• 450 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable Monoblock Amplifier

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    FAQ for Monoblock Sub Amplifiers in 1981 G2500

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1981 GMC G2500?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your G2500.

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