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1977 Cadillac DeVille

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

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Amps for Adding Speakers for 1977 Cadillac DeVille

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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Stinger SPX1000X5 with NVX 8 Gauge Amp Kit

150W RMS Micro Class D 5-Channel Marine Amplifier

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Stinger SPX1000X5 with NVX 8 Gauge Amp Kit

150W RMS Micro Class D 5-Channel Marine Amplifier

• 95 x 4 @ 4 ohm Stereo - CH 1-4
• 275 x 1 @4 ohm - CH 5
• 150 x 4 @ 2 ohm Stero - CH 1-4
• 500 x 1 @ 2 ohm - CH 5
• Total RMS Power: 150 watts
• Class D 4 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 95 x 4 @ 4 ohm Stereo - CH 1-4
• 275 x 1 @4 ohm - CH 5
• 150 x 4 @ 2 ohm Stero - CH 1-4
• 500 x 1 @ 2 ohm - CH 5
• Total RMS Power: 150 watts
• Class D 4 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio DMD600.4D with NVX 8 Gauge Amp Kit

600W RMS DMD Series Class-D 4-Channel Amplifier

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Diamond Audio DMD600.4D with NVX 8 Gauge Amp Kit

600W RMS DMD Series Class-D 4-Channel Amplifier

• 150 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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-11% $449.98

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• 150 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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DS18 G4000.5D with NVX 4 Gauge Amp Kit

4000W Peak (1480W RMS) Class D Gen-X Series 5-Channel Amplifier with Bass Remote and Input Selector

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DS18 G4000.5D with NVX 4 Gauge Amp Kit

4000W Peak (1480W RMS) Class D Gen-X Series 5-Channel Amplifier with Bass Remote and Input Selector

• 130 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 220 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 420 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1480 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 130 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 220 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 420 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1480 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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DS18 NXL-X1200.5D (Hydro) with NVX 4 Gauge Amp Kit

2800W Peak Class D HYDRO Series 5-Channel Marine and Powersports Amplifier

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DS18 NXL-X1200.5D (Hydro) with NVX 4 Gauge Amp Kit

2800W Peak Class D HYDRO Series 5-Channel Marine and Powersports Amplifier

• 150 watts x 4 channel + 350 watts @ 4 ohm
• 200 watts x 4 channel + 600 watts @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm + 600 watts @ 2 ohm
• Total RMS Power: 2800 watts
• IPX6 waterproof rating
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 4 channel + 350 watts @ 4 ohm
• 200 watts x 4 channel + 600 watts @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm + 600 watts @ 2 ohm
• Total RMS Power: 2800 watts
• IPX6 waterproof rating
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 SMD-200.4AB with NVX 1/0 Gauge Amp Kit

800W RMS Class AB SMD Series 4 Channel Car Amplifier with Bass Remote

SMD2004AB_XKIT44 big Out of stock
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DS18 SMD-200.4AB with NVX 1/0 Gauge Amp Kit

800W RMS Class AB SMD Series 4 Channel Car Amplifier with Bass Remote

• 150 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega SRPM1100.5D with NVX 8 Gauge Amp Kit

980W RMS Stroker RPM Series Class-D 5-Channel Marine Amplifier with Bass Remote

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Cerwin Vega SRPM1100.5D with NVX 8 Gauge Amp Kit

980W RMS Stroker RPM Series Class-D 5-Channel Marine Amplifier with Bass Remote

• 100 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 120 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 980 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 120 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 980 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

AudioControl ACX-300.4 with Belva 8 Gauge Amp Kit

300 Watt Marine 4-Channel Amplifier

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AudioControl ACX-300.4 with Belva 8 Gauge Amp Kit

300 Watt Marine 4-Channel Amplifier

• 300 Watts @ 2 Ohm
• 175 Watts @ 4 Ohm
• 4/3/2 Channel Amplifier
• Includes Amplifier Wiring Kit

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• 300 Watts @ 2 Ohm
• 175 Watts @ 4 Ohm
• 4/3/2 Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin-Vega VCU82 with NVX 8 Gauge Amp Kit

Vega Series 2-Channel Class D 600W Full-Range Amplifier

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Cerwin-Vega VCU82 with NVX 8 Gauge Amp Kit

Vega Series 2-Channel Class D 600W Full-Range Amplifier

• 2-Channel Class D 600W Full-Range Amplifier
• RMS Power: 300W x 2 @ 2 Ohm
• RMS Power: 200W x 2 @ 4 Ohm
• RMS Power Bridged: 600W x 1 @ 4 Ohm
• Marine Grade Certified
• Remote Level Control Included
• Includes Amplifier Wiring Kit

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• 2-Channel Class D 600W Full-Range Amplifier
• RMS Power: 300W x 2 @ 2 Ohm
• RMS Power: 200W x 2 @ 4 Ohm
• RMS Power Bridged: 600W x 1 @ 4 Ohm
• Marine Grade Certified
• Remote Level Control Included
• Includes Amplifier Wiring Kit

Cerwin Vega S9500.2D with NVX 8 Gauge Amp Kit

500W RMS Stroker Series Class-D 2-Channel Amplifier with Bass Remote

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Cerwin Vega S9500.2D with NVX 8 Gauge Amp Kit

500W RMS Stroker Series Class-D 2-Channel Amplifier with Bass Remote

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

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

Lowest price in 30 days

DS18 NXL-X900.6D with NVX 4 Gauge Amp Kit

3000W Peak Class D HYDRO Series 6-Channel Marine and Powersports Amplifier

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DS18 NXL-X900.6D with NVX 4 Gauge Amp Kit

3000W Peak Class D HYDRO Series 6-Channel Marine and Powersports Amplifier

• 150 watts x 6 channel @ 4 ohm
• 250 watts x 6 channel @ 2 ohm
• 500 watts x 3 channel @ 1 ohm
• IPX6 waterproof rating
• Class D 2 ohm Stable 6-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 6 channel @ 4 ohm
• 250 watts x 6 channel @ 2 ohm
• 500 watts x 3 channel @ 1 ohm
• IPX6 waterproof rating
• Class D 2 ohm Stable 6-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Lowest price in 30 days

DS18 NXL-N4 (Hydro) with NVX 8 Gauge Amp Kit

1800W Peak Class D HYDRO Series 4-Channel Ultra-Compact Marine and Powersports Amplifier

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DS18 NXL-N4 (Hydro) with NVX 8 Gauge Amp Kit

1800W Peak Class D HYDRO Series 4-Channel Ultra-Compact Marine and Powersports Amplifier

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• IP67 waterproof rating
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• IP67 waterproof rating
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

MB Quart FA2-400.4 with Amplifier Wiring Kit

400W RMS Formula Series Class-D 4-Channel Car Amplifier

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MB Quart FA2-400.4 with Amplifier Wiring Kit

400W RMS Formula Series Class-D 4-Channel Car Amplifier

• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 400 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 400 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Earthquake MiNi D1000.4 with Belva 8 Gauge Amp Kit

1000W Class D 4-Channel Mini Series Amplifier

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Earthquake MiNi D1000.4 with Belva 8 Gauge Amp Kit

1000W Class D 4-Channel Mini Series Amplifier

• RMS Power: 65W x 4 @ 4 ohm, 90W x 4 @ 2 ohm, Bridged, 190 watts x 2 @ 4 ohm
• Total Peak Power: 1000W
• Variable Bass Boost
• Optical Control Circuitry
• Crossover Frequencies: 40-400Hz
• Includes Amplifier Wiring Kit

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• RMS Power: 65W x 4 @ 4 ohm, 90W x 4 @ 2 ohm, Bridged, 190 watts x 2 @ 4 ohm
• Total Peak Power: 1000W
• Variable Bass Boost
• Optical Control Circuitry
• Crossover Frequencies: 40-400Hz
• Includes Amplifier Wiring Kit

Diamond Audio HXM1100.6D with NVX 4 Gauge Amp Kit

1100W RMS HXM Series Class-D 6-Channel Full-Range Marine Amplifier

HXM11006D_XKIT46 big
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Diamond Audio HXM1100.6D with NVX 4 Gauge Amp Kit

1100W RMS HXM Series Class-D 6-Channel Full-Range Marine Amplifier

• 90 watts x 4 channel + 250 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 6-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 90 watts x 4 channel + 250 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 6-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio HX400.2 with NVX 8 Gauge Amp Kit

400W RMS HEX Series 2-Channel Full Range Class D Amplifier

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Diamond Audio HX400.2 with NVX 8 Gauge Amp Kit

400W RMS HEX Series 2-Channel Full Range Class D Amplifier

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

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-20% $529.99

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• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio DXM600.2D with NVX 8 Gauge Amp Kit

600W RMS DXM Series Class-D 2-Channel Full Range Marine Amplifier

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Diamond Audio DXM600.2D with NVX 8 Gauge Amp Kit

600W RMS DXM Series Class-D 2-Channel Full Range Marine Amplifier

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Stable & Reliable Four Layers PCB Trace Layout
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $625.98
-15% $529.99

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• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Stable & Reliable Four Layers PCB Trace Layout
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 SMD-2800.5 with NVX 1/0 Gauge Amp Kit

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

SMD28005_XKIT06 big
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DS18 SMD-2800.5 with NVX 1/0 Gauge Amp Kit

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

• 180 watts x 4 channel + 700 watts x 1 channel @ 4 ohm
• 250 watts x 4 channel + 1100 watts x 1 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm + 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 2800 watts
• Class AB / D 1 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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$1,182.10

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• 180 watts x 4 channel + 700 watts x 1 channel @ 4 ohm
• 250 watts x 4 channel + 1100 watts x 1 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm + 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 2800 watts
• Class AB / D 1 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz HCP5D with NVX 8 Gauge Amp Kit

Class D 5-Channel Car Subwoofer Amplifier

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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

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• 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

Cerwin Vega SRPM700.4DW with NVX 8 Gauge Amp Kit

700W RMS Class-D 4-Channel 2-Ohm Stable Marine Amplifier - White

SRPM700.4DW, XKIT84 big
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Cerwin Vega SRPM700.4DW with NVX 8 Gauge Amp Kit

700W RMS Class-D 4-Channel 2-Ohm Stable Marine Amplifier - White

• 100 Watts RMS x 4 @ 4 ohm
• 150 Watts RMS x 4 @ 2 ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

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-31% $429.99

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• 100 Watts RMS x 4 @ 4 ohm
• 150 Watts RMS x 4 @ 2 ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

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DS18 NXL-F4 (Hydro) with NVX 8 Gauge Amp Kit

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

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DS18 NXL-F4 (Hydro) with NVX 8 Gauge Amp Kit

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 640 watts
• IPX67 waterproof rating
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $635.94
-21% $504.75

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• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 640 watts
• IPX67 waterproof rating
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 1977 DeVille

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 1977 Cadillac DeVille?

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