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1981 GMC K3500 Pickup

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

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Amplifiers for Powering a Sub for 1981 GMC K3500 Pickup

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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NVX VADM1 (Open Box, Great)

500W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote

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NVX VADM1 (Open Box, Great)

500W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote

• 500 Watt True RMS Output!
• Marine Certified Monoblock Micro Class D Amplifier
• 180W x 1-Chan. @ 4 ohm
• 320W x 1-Chan. @ 2 ohm
• 500W x 1-Chan. @ 1 ohm
• 3-Way System Protection
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint

10% Off Open Box!
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Hifonics BG-700.1

700W RMS Class D Brutus BG Series Monoblock Car Amplifier with Bass Remote

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Hifonics BG-700.1

700W RMS Class D Brutus BG Series Monoblock Car Amplifier with Bass Remote

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

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

Planet Audio MB2000.1D

2000W Peak (1500W RMS) Class D Planet Pro Series Monoblock Car Amplifier with Bass Remote

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Planet Audio MB2000.1D

2000W Peak (1500W RMS) Class D Planet Pro Series Monoblock Car Amplifier with Bass Remote

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

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MTX Thunder TH1500.1

1500W RMS Class D Thunder Series Monoblock Car Amplifier with Bass Remote

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MTX Thunder TH1500.1

1500W RMS Class D Thunder Series Monoblock Car Amplifier with Bass Remote

• 500 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Soundstream PN1.6000DX

6000W Peak (1800W RMS) Class D Picasso Nano Series Monoblock Car Amplifier with Bass Remote

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Soundstream PN1.6000DX

6000W Peak (1800W RMS) Class D Picasso Nano Series Monoblock Car Amplifier with Bass Remote

• 1000 watts x 1 channel @ 2 ohm
• 1800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $279.99
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Rockford Fosgate M2-500X1

500W RMS M2 Series Monoblock Marine Amplifier with Remote Bass Knob

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Rockford Fosgate M2-500X1

500W RMS M2 Series Monoblock Marine Amplifier with Remote Bass Knob

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

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

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Sundown Audio SALT-8 Competition

8000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT8)

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Sundown Audio SALT-8 Competition

8000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT8)

• 2000 watts x 1 channel @ 4 ohm
• 4000 watts x 1 channel @ 2 ohm
• 8000 watts x 1 channel @ 1 ohm
• 16000 watts x 1 channel @ 2 ohm Bridged
• Total RMS Power: 8000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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DS18 ZR2000.1D

6000W Peak (2000W RMS) Class D ZR Series Monoblock Car Amplifier with Bass Remote

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DS18 ZR2000.1D

6000W Peak (2000W RMS) Class D ZR Series Monoblock Car Amplifier with Bass Remote

• 800 watts x 1 channel @ 4 ohm
• 1300 watts x 1 channel @ 2 ohm
• Total RMS Power: 2000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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American Bass VFL REBEL 5000.1

5000W RMS Class D VFL Rebel Series Monoblock Full Range Amplifier

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American Bass VFL REBEL 5000.1

5000W RMS Class D VFL Rebel Series Monoblock Full Range Amplifier

• 1600 watts x 1 channel @ 4 ohm
• 3400 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 500 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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NVX XKIT02

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Hifonics Brutus BRL1200.1

1200W RMS Class D Brutus BRL Series Monoblock Car Amplifier with Bass Remote

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Hifonics Brutus BRL1200.1

1200W RMS Class D Brutus BRL Series Monoblock Car Amplifier with Bass Remote

• 400 watts x 1 channel @ 4 ohm
• 700 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $299.00
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Hifonics Brutus BRL1600.1

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

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Hifonics Brutus BRL1600.1

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

• 750 watts x 1 channel @ 4 ohm
• 1250 watts x 1 channel @ 2 ohm
• 1700 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 $369.00
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MTX RTX3000.1

3000W RMS Class D RTX Series Monoblock Car Amplifier with Bass Remote

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MTX RTX3000.1

3000W RMS Class D RTX Series Monoblock Car Amplifier with Bass Remote

• 1000 watts x 1 channel @ 4 ohm
• 2000 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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List price $1149.95
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• 1000 watts x 1 channel @ 4 ohm
• 2000 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

Alpine KTA-30MW Tough Power Pack

600W Peak (300W RMS) Class D Power Pack Series Monoblock Marine and Powersports Amplifier

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Alpine KTA-30MW Tough Power Pack

600W Peak (300W RMS) Class D Power Pack Series Monoblock Marine and Powersports Amplifier

• 300 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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List price $600.00
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MB Quart QA1-1500.1D

1500W Peak Class D Q-Series Monoblock Car Amplifier with Bass Remote

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MB Quart QA1-1500.1D

1500W Peak Class D Q-Series Monoblock Car Amplifier with Bass Remote

• 750 watts x 1 channel @ 4 ohm
• 1100 watts x 1 channel @ 2 ohm
• 1500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $399.99
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• 750 watts x 1 channel @ 4 ohm
• 1100 watts x 1 channel @ 2 ohm
• 1500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

Sound Extreme by ECOXGEAR SEI-AMPEV30011

300W RMS Class D EV Series Monoblock Marine Amplifier

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Sound Extreme by ECOXGEAR SEI-AMPEV30011

300W RMS Class D EV Series Monoblock Marine Amplifier

• 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable Monoblock Amplifier
• Operating Voltage: 43V to 82V
• Marine-grade sealed die-cast aluminum chassis

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$299.99

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• 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable Monoblock Amplifier
• Operating Voltage: 43V to 82V
• Marine-grade sealed die-cast aluminum chassis

Sundown Audio SAEv4-600.1D

600W RMS Class D SAE Series Monoblock Car Amplifier with Bass Remote (SAEv.4-600D)

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Sundown Audio SAEv4-600.1D

600W RMS Class D SAE Series Monoblock Car Amplifier with Bass Remote (SAEv.4-600D)

• 250 watts x 1 channel @ 4 ohm
• 450 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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List price $347.99
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Diamond Audio MICRO1V2

500W RMS Class D MicroV2 Series Compact Monoblock Amplifier with Bass Remote and Bluetooth

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Diamond Audio MICRO1V2

500W RMS Class D MicroV2 Series Compact Monoblock Amplifier with Bass Remote and Bluetooth

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

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Hertz DPower 1

600W Peak (300W RMS) Class D DPOWER Series Monoblock Car Amplifier

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Hertz DPower 1

600W Peak (300W RMS) Class D DPOWER Series Monoblock Car Amplifier

• 180 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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Jensen JA1B

290W RMS JA Series Class-D Compact Monoblock Car Amplifier with DSP

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Jensen JA1B

290W RMS JA Series Class-D Compact Monoblock Car Amplifier with DSP

• 290 watts x 1 channel @ 4 ohm
• 470 watts x 1 channel @ 2 ohm
• 595 watts x 1 channel @ 1 ohm
• Total RMS Power: 290 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable Monoblock Amplifier

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Cerwin-Vega CVP2400.1

2400W Peak (660W RMS) Class D CVP Series Monoblock Car Amplifier with Bass Remote

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Cerwin-Vega CVP2400.1

2400W Peak (660W RMS) Class D CVP Series Monoblock Car Amplifier with Bass Remote

• 370 watts x 1 channel @ 4 ohm
• 660 watts x 1 channel @ 2 ohm
• Total RMS Power: 660 watts
• Class D 2 ohm Stable Monoblock Amplifier

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    FAQ for Monoblock Sub Amplifiers in 1981 K3500 Pickup

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1981 GMC K3500 Pickup?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your K3500 Pickup.

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