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1981 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 1981 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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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 FX6

4500W Peak (1500W RMS) Class D FX Series 6-Channel Car Amplifier with LED

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DS18 FX6

4500W Peak (1500W RMS) Class D FX Series 6-Channel Car Amplifier with LED

• 180 watts x 6 channel @ 4 ohm
• 250 watts x 6 channel @ 2 ohm
• Bridged: 500 watts x 3 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 6-Channel-Channel Amplifier

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NVX XKIT46

$129.99

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American Bass XFL-DC-4200

1500W Peak (720W RMS) Class D XFL Series 4 Channel Car Amplifier

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American Bass XFL-DC-4200

1500W Peak (720W RMS) Class D XFL Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 180 watts x 4 channel @ 2 ohm
• Bridged: 360 watts x 2 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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JL Audio VX400/4i

400W RMS Class D 4 Channel Car Amplifier with Built-in DSP

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JL Audio VX400/4i

400W RMS Class D 4 Channel Car Amplifier with Built-in DSP

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes integrated DSP

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DS18 FRP4K4TI

4000W RMS Class D FRP Series 4-Channel Compact Car Amplfier (Titanium)

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DS18 FRP4K4TI

4000W RMS Class D FRP Series 4-Channel Compact Car Amplfier (Titanium)

• 400 watts x 4 channel @ 4 ohm
• 700 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1200 watts x 2 channel @ 4 ohm
• Bridged: 1800 watts x 2 channel @ 2 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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NVX XKIT04

NVX XKIT04

$192.98

$135.09

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• 400 watts x 4 channel @ 4 ohm
• 700 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1200 watts x 2 channel @ 4 ohm
• Bridged: 1800 watts x 2 channel @ 2 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

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

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NVX XKIT44

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Wet Sounds HTM-8

1200W RMS Class D HTM Series 8 Channel Marine Amplifier with LED Backlit Badge

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Wet Sounds HTM-8

1200W RMS Class D HTM Series 8 Channel Marine Amplifier with LED Backlit Badge

• 85 watts x 8 channel @ 4 ohm
• 150 watts x 8 channel @ 2 ohm
• Bridged: 300 watts x 4 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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• 85 watts x 8 channel @ 4 ohm
• 150 watts x 8 channel @ 2 ohm
• Bridged: 300 watts x 4 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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JL Audio VX700/5i

700W RMS Class D VXi Series 5 Channel Car Amplifier with Built-in DSP

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JL Audio VX700/5i

700W RMS Class D VXi Series 5 Channel Car Amplifier with Built-in DSP

• 75 watts x 4 channel + 180 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes integrated DSP

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Deaf Bonce Avatar ABR-200.2

200W RMS Class AB Buran Series 2 Channel Car Amplifier

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Deaf Bonce Avatar ABR-200.2

200W RMS Class AB Buran Series 2 Channel Car Amplifier

• 80 watts x 2 channel @ 4 ohm
• 100 watts x 2 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

Save 30% off an NVX XKIT82 Amp Kit at Checkout!
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$89.90

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NVX XKIT82

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DS18 G1000.4D

1000 Peak (600W RMS) Class D Gen-X Series 4 Channel Full Range Car Amplifier

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DS18 G1000.4D

1000 Peak (600W RMS) Class D Gen-X Series 4 Channel Full Range Car Amplifier

• 90 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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NVX XKIT44

$119.99

$83.99

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

• 65 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 190 watts x 4 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Wet Sounds Sinister-SDX6

1755W RMS Class D Sinister Series 6 Channel Marine Amplifier

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Wet Sounds Sinister-SDX6

1755W RMS Class D Sinister Series 6 Channel Marine Amplifier

• 185 watts x 6 channel @ 4 ohm
• 290 watts x 6 channel @ 2 ohm
• Bridged: 585 watts x 3 channel @ 4 ohm
• Total RMS Power: 1755 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

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• 185 watts x 6 channel @ 4 ohm
• 290 watts x 6 channel @ 2 ohm
• Bridged: 585 watts x 3 channel @ 4 ohm
• Total RMS Power: 1755 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

Sundown Audio SFB1800.5D (A-SFB18005)

1800W RMS Class D SFB Series 5 Channel Car Amplifier

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Sundown Audio SFB1800.5D (A-SFB18005)

1800W RMS Class D SFB Series 5 Channel Car Amplifier

• 200 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 300 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable 5-Channel Amplifier

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List price $599.99
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• 200 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 300 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable 5-Channel Amplifier

Hertz HCP 2X

800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

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Hertz HCP 2X

800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

• 100 watts x 2 channel @ 4 ohm
• 160 watts x 2 channel @ 2 ohm
• Bridged: 320 watts x 1 channel @ 1 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 2-Channel-Channel Amplifier

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List price $325.00
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Autotek MM-3025.4D Mean Machine

3000W Peak Class D Mean Machine Series 4-Channel Car Amplifier

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Autotek MM-3025.4D Mean Machine

3000W Peak Class D Mean Machine Series 4-Channel Car Amplifier

• 375 watts x 4 channel @ 4 ohm
• 750 watts x 4 channel @ 2 ohm
• Bridged: 1500 watts x 2 channel @ 4 ohm
• Total Peak Power: 3000 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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Wet Sounds SYN-DX6

1400W Peak Class D SYN-DX Series 6 Channel Marine Amplifier

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Wet Sounds SYN-DX6

1400W Peak Class D SYN-DX Series 6 Channel Marine Amplifier

• 125 watts x 4 channel + 150 watts x 2 channel @ 4 ohm
• 200 watts x 4 channel + 300 watts x 2 channel @ 2 ohm
• Bridged: 400 watts x 2 channel + 600 watts x 1 channel @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 6-Channel Marine Amplifier

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• 125 watts x 4 channel + 150 watts x 2 channel @ 4 ohm
• 200 watts x 4 channel + 300 watts x 2 channel @ 2 ohm
• Bridged: 400 watts x 2 channel + 600 watts x 1 channel @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 6-Channel Marine Amplifier

Limited time!

Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

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Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $230.00
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• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Diamond Audio HX600.4

1000W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

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Diamond Audio HX600.4

1000W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

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

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Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

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Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Kicker PXA400.4 (48PXA4004)

800W Peak (400W RMS) Class D PXA Series 4-Channel Marine and Powersports Amplifier

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Kicker PXA400.4 (48PXA4004)

800W Peak (400W RMS) Class D PXA Series 4-Channel Marine and Powersports Amplifier

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Deaf Bonce Machete MLA-160.2

460W RMS Class D Machete Series 2-Channel Car Amplifier

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Deaf Bonce Machete MLA-160.2

460W RMS Class D Machete Series 2-Channel Car Amplifier

• 160 watts x 2 channel @ 4 ohm
• 230 watts x 2 channel @ 2 ohm
• Bridged: 460 watts x 1 channel @ 4 ohm
• Total RMS Power: 460 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 1981 DeVille

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 1981 Cadillac DeVille?

    A: Yes this page includes all the best Multi-channel Amplifiers for Adding Speakers that work in your DeVille.

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