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1978 GMC Jimmy

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

Overview Upgrade your Stereo 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 1978 GMC Jimmy

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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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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Belva BXD3K with Amplifier Wiring Kit

3000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

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Belva BXD3K with Amplifier Wiring Kit

3000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

• 750 Watts Max x 1 @ 4 ohm
• 1500 Watts Max x 1 @ 2 ohm
• 3000 Watts Max x 1 @ 1 ohm
• Total Max Power: 3000 watts Watts
• 96dB signal to noise ratio

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-50% $115.11

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• 750 Watts Max x 1 @ 4 ohm
• 1500 Watts Max x 1 @ 2 ohm
• 3000 Watts Max x 1 @ 1 ohm
• Total Max Power: 3000 watts Watts
• 96dB signal to noise ratio

Massive Audio T2 with Amplifier Wiring Kit

800 Watts RMS @ 1 Ohm Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

T2, XKIT42 big
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Massive Audio T2 with Amplifier Wiring Kit

800 Watts RMS @ 1 Ohm Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

• 200 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 1600 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4.25"W x 7.99"L x1.6 "H
• Includes Amplifier Wiring Kit

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• 200 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 1600 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4.25"W x 7.99"L x1.6 "H
• Includes Amplifier Wiring Kit

Deaf Bonce MLA-800 with Amplifier Wiring Kit

790W RMS Machete Series Class-D Monoblock Amplifier

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Deaf Bonce MLA-800 with Amplifier Wiring Kit

790W RMS Machete Series Class-D Monoblock Amplifier

• 340 watts x 1 channel @ 4 ohm
• 540 watts x 1 channel @ 2 ohm
• 790 watts x 1 channel @ 1 ohm
• Total RMS Power: 790 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 340 watts x 1 channel @ 4 ohm
• 540 watts x 1 channel @ 2 ohm
• 790 watts x 1 channel @ 1 ohm
• Total RMS Power: 790 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Deaf Bonce MLA-1500 with Belva 4 Gauge Amp Kit

1480W RMS Machete Series Class-D Monoblock Amplifier

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Deaf Bonce MLA-1500 with Belva 4 Gauge Amp Kit

1480W RMS Machete Series Class-D Monoblock Amplifier

• 540 watts x 1 channel @ 4 ohm
• 920 watts x 1 channel @ 2 ohm
• 1480 watts x 1 channel @ 1 ohm
• Total RMS Power: 1480 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Belva BAK42 4 Gauge Amp Wiring Kit

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-12% $264.39

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• 540 watts x 1 channel @ 4 ohm
• 920 watts x 1 channel @ 2 ohm
• 1480 watts x 1 channel @ 1 ohm
• Total RMS Power: 1480 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Belva BAK42 4 Gauge Amp Wiring Kit

Alpine KTA-200M with NVX 8 Gauge Amp Kit

200W RMS Class D Monoblock Subwoofer Amplifier

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Alpine KTA-200M with NVX 8 Gauge Amp Kit

200W RMS Class D Monoblock Subwoofer Amplifier

• Power stack Capable
• CTA-2006 Compliant
• Fits in the open space behind Alpine’s iLX-W650
• 100W x 1 RMS
• 200W x 1 RMS
• 400W x 1 DPP
• Includes Amplifier Wiring Kit

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• Power stack Capable
• CTA-2006 Compliant
• Fits in the open space behind Alpine’s iLX-W650
• 100W x 1 RMS
• 200W x 1 RMS
• 400W x 1 DPP
• Includes Amplifier Wiring Kit

MB Quart FA2-1000.1 with Amplifier Wiring Kit

1000W RMS Formula Series Class-D Monoblock Car Amplifier

FA2-1000.1, BAK42 big
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MB Quart FA2-1000.1 with Amplifier Wiring Kit

1000W RMS Formula Series Class-D Monoblock Car Amplifier

• 250 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Class D Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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-29% $199.99

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• 250 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Class D Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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Rockford Fosgate Punch P300X1 with Amplifier Wiring Kit

300W RMS Punch Series Monoblock Class AB Car Power Amplifier

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Rockford Fosgate Punch P300X1 with Amplifier Wiring Kit

300W RMS Punch Series Monoblock Class AB Car Power Amplifier

• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• Built-in NOMAD Circuit Protects Amplifier
• Tuned Bass EQ: 0 to +18 dB
• Cast Aluminum Heatsink with Dynamic Thermal Management
• Dimensions: 9-7/8"L x 7-3/4"W x 2-3/8"H

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• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• Built-in NOMAD Circuit Protects Amplifier
• Tuned Bass EQ: 0 to +18 dB
• Cast Aluminum Heatsink with Dynamic Thermal Management
• Dimensions: 9-7/8"L x 7-3/4"W x 2-3/8"H

Cerwin-Vega CVPM1000.1D with Belva 4 Gauge Amp Kit

1000W Peak (500W RMS) CVP Series Class-D Monoblock Amplifier

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Cerwin-Vega CVPM1000.1D with Belva 4 Gauge Amp Kit

1000W Peak (500W RMS) CVP Series Class-D Monoblock Amplifier

• 310 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
• Includes Amplifier Wiring Kit

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-37% $159.99

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• 310 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
• Includes Amplifier Wiring Kit

Crunch DR-3725.1D with Belva 4 Gauge Amp Kit

3725W Peak Class D V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

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Crunch DR-3725.1D with Belva 4 Gauge Amp Kit

3725W Peak Class D V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

• 930 watts x 1 channel @ 4 ohm
• 1860 watts x 1 channel @ 2 ohm
• 3725 watts x 1 channel @ 1 ohm
• Total peak power output: 3725 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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-29% $155.99

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• 930 watts x 1 channel @ 4 ohm
• 1860 watts x 1 channel @ 2 ohm
• 3725 watts x 1 channel @ 1 ohm
• Total peak power output: 3725 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Deaf Bonce MFA 1.1000 with Belva 4 Gauge Amp Kit

1000W RMS Class D Machete Series Monoblock Subwoofer Amplifier with Bass Remote

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Deaf Bonce MFA 1.1000 with Belva 4 Gauge Amp Kit

1000W RMS Class D Machete Series Monoblock Subwoofer Amplifier with Bass Remote

• 430 watts x 1 channel @ 4 ohm
• 710 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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-15% $194.39

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• 430 watts x 1 channel @ 4 ohm
• 710 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

Diamond Audio MICRO1V2 with NVX 8 Gauge Amp Kit

500W RMS Micro Series Class-D Monoblock Amplifier

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Diamond Audio MICRO1V2 with NVX 8 Gauge Amp Kit

500W RMS Micro Series Class-D Monoblock Amplifier

• 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
• Includes Amplifier Wiring Kit

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-29% $399.99

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• 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
• Includes Amplifier Wiring Kit

Diamond Audio DMD500.1D with NVX 4 Gauge Amp Kit

500W RMS DMD Series Monoblock Class-D Amplifier

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Diamond Audio DMD500.1D with NVX 4 Gauge Amp Kit

500W RMS DMD Series Monoblock Class-D Amplifier

• 340 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
• Includes Amplifier Wiring Kit

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-11% $396.98

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• 340 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
• Includes Amplifier Wiring Kit

Lowest price in 30 days

DS18 H-KO5 with NVX 1/0 Gauge Amp Kit

5000W RMS HOOLIGAN KO Series Class-D Monoblock Amplifier, Voltmeter, Clip Indicator Made In Korea

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DS18 H-KO5 with NVX 1/0 Gauge Amp Kit

5000W RMS HOOLIGAN KO Series Class-D Monoblock Amplifier, Voltmeter, Clip Indicator Made In Korea

• 2200 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 0.5 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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-7% $1,329.92

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• 2200 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 0.5 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

JVC KS-DR2001D with NVX 8 Gauge Amp Kit

300W RMS KS Series Class-D Marine/Powersports Monoblock Amplifier

KSDR2001D_XKIT82 big
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JVC KS-DR2001D with NVX 8 Gauge Amp Kit

300W RMS KS Series Class-D Marine/Powersports Monoblock Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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-12% $398.99

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• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Lowest price in 30 days

DS18 SMD-8500.1D with NVX 1/0 Gauge Amp Kit

8500W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote

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DS18 SMD-8500.1D with NVX 1/0 Gauge Amp Kit

8500W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote

• 3300 watts x 1 channel @ 4 ohm
• 5700 watts x 1 channel @ 2 ohm
• 8500 watts x 1 channel @ 1 ohm
• Total RMS Power: 8500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 3300 watts x 1 channel @ 4 ohm
• 5700 watts x 1 channel @ 2 ohm
• 8500 watts x 1 channel @ 1 ohm
• Total RMS Power: 8500 watts
• Class D 1 ohm Stable Monoblock Amplifier

Lowest price in 30 days

DS18 SMD-3000.1D with NVX 1/0 Gauge Amp Kit

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

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DS18 SMD-3000.1D with NVX 1/0 Gauge Amp Kit

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

• 1300 watts x 1 channel @ 4 ohm
• 2200 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
• Includes Amplifier Wiring Kit

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-12% $901.04

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• 1300 watts x 1 channel @ 4 ohm
• 2200 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
• Includes Amplifier Wiring Kit

Earthquake Sound Mini D2000 with NVX 8 Gauge Amp Kit

2000W Max Monoblock MINI D Mono Compact Car Amplifier

MINID2000_XKIT82 big
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Earthquake Sound Mini D2000 with NVX 8 Gauge Amp Kit

2000W Max Monoblock MINI D Mono Compact Car Amplifier

• RMS: 650W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Mini Class D Design
• Bass Boost: 0-12 dB at 50 Hz
• Wired Bass Remote Control Included
• Dimensions: 6-5/16"W x 12-5/16"L x 1-7/8"H
• Includes Amplifier Wiring Kit

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• RMS: 650W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Mini Class D Design
• Bass Boost: 0-12 dB at 50 Hz
• Wired Bass Remote Control Included
• Dimensions: 6-5/16"W x 12-5/16"L x 1-7/8"H
• Includes Amplifier Wiring Kit

Cerwin Vega SRPM1000.1DW with Amplifier Wiring kit

Stroker Series Monoblock Marine Amplifier - White (1000W RMS)

SRPM1000.1DW, XKIT42 big
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Cerwin Vega SRPM1000.1DW with Amplifier Wiring kit

Stroker Series Monoblock Marine Amplifier - White (1000W RMS)

• RMS Power: 1000 Watts x 1 @ 1Ω / 750 Watts x 1 @ 2Ω / 400 Watts x 1 @ 4Ω
• Superior Full Range Class D Design
• Conformal Coated PCB To Protect Against Moisture, Vibration/Mechanical Stress
• Top Mount Controls For Quick Precise Adjustments
• Frequency Response: 10-350KHz

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• RMS Power: 1000 Watts x 1 @ 1Ω / 750 Watts x 1 @ 2Ω / 400 Watts x 1 @ 4Ω
• Superior Full Range Class D Design
• Conformal Coated PCB To Protect Against Moisture, Vibration/Mechanical Stress
• Top Mount Controls For Quick Precise Adjustments
• Frequency Response: 10-350KHz

DS18 NXL-N1 (Hydro) with NVX 8 Gauge Amp Kit

1050W Peak Class D HYDRO Series Ultra Compact Monoblock Marine and Powersports Amplifier

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DS18 NXL-N1 (Hydro) with NVX 8 Gauge Amp Kit

1050W Peak Class D HYDRO Series Ultra Compact Monoblock Marine and Powersports Amplifier

• 140 watts x 1 channel @ 4 ohm
• 230 watts x 1 channel @ 2 ohm
• 350 watts x 1 channel @ 1 ohm
• Total Peak Power: 1050 watts
• IP67 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 140 watts x 1 channel @ 4 ohm
• 230 watts x 1 channel @ 2 ohm
• 350 watts x 1 channel @ 1 ohm
• Total Peak Power: 1050 watts
• IP67 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Lowest price in 30 days

MTX TH750.1 with NVX 4 Gauge Amp Kit

750W RMS Class D Thunder Series Monoblock Car Amplifier (with Bass Remote)

TH7501_XKIT42 big
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MTX TH750.1 with NVX 4 Gauge Amp Kit

750W RMS Class D Thunder Series Monoblock Car Amplifier (with Bass Remote)

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

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

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    FAQ for Monoblock Sub Amplifiers in 1978 Jimmy

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1978 GMC Jimmy?

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

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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