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2020 Kia Optima

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

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

Amps for Adding Speakers for 2020 Kia Optima

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.
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 VAD10004v1 Version 1 (Like New (Open Box))

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

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NVX VAD10004v1 Version 1 (Like New (Open Box))

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

• 150 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
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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List price $349.99
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NVX XKIT44

$119.99

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Sundown Audio SAEv4-150.4 (Like New (Open Box))

900W RMS Class AB SAE Series 4-Channel Car Amplifier (SAEv.4-150.4)

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Sundown Audio SAEv4-150.4 (Like New (Open Box))

900W RMS Class AB SAE Series 4-Channel Car Amplifier (SAEv.4-150.4)

• 150 watts x 4 channel @ 4 ohm
• 225 watts x 4 channel @ 2 ohm
• Bridged: 450 watts x 2 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

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List price $563.99
-29% $399.49

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• 150 watts x 4 channel @ 4 ohm
• 225 watts x 4 channel @ 2 ohm
• Bridged: 450 watts x 2 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

Kenwood eXcelon X303-4 (Like New (Open Box))

600W Peak (300W RMS) Class D eXcelon Series 4 Channel Car Amplifier

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Kenwood eXcelon X303-4 (Like New (Open Box))

600W Peak (300W RMS) Class D eXcelon Series 4 Channel Car Amplifier

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

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List price $400.00
-36% $254.99

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

MTX Thunder TH400.4 (Open Box, Great)

400W RMS Class D Thunder Series 4 Channel Car Amplifier

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MTX Thunder TH400.4 (Open Box, Great)

400W RMS Class D Thunder Series 4 Channel Car Amplifier

• 50 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-Channel Amplifier

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List price $479.95
-37% $300.97

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• 50 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-Channel Amplifier

NVX VADM4 Version 2 (VADM4v2) (Open Box, Great)

500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

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NVX VADM4 Version 2 (VADM4v2) (Open Box, Great)

500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

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

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List price $237.99
-43% $136.49

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MB Quart NA3-1000.5 (Open Box, Good)

Nautic Marine 1000 Watt 5 Channel Marine Amplifier with Bass Remote

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MB Quart NA3-1000.5 (Open Box, Good)

Nautic Marine 1000 Watt 5 Channel Marine Amplifier with Bass Remote

• 75 Watts Peak x 4 + 100 Watts x 1 @ 4 ohm
• 150 Watts Peak x 4 + 200 Watts x 1 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant
• NMMA Certified
• Audiophile Marine Standard
• LED system protection circuit diagnostics
• Class SQ & Class Q1

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List price $569.99
-43% $323.99

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• 75 Watts Peak x 4 + 100 Watts x 1 @ 4 ohm
• 150 Watts Peak x 4 + 200 Watts x 1 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant
• NMMA Certified
• Audiophile Marine Standard
• LED system protection circuit diagnostics
• Class SQ & Class Q1

JL Audio RD400/4 (Open Box, Great)

400W RMS Class D RD Series 4 Channel Car Amplifier

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JL Audio RD400/4 (Open Box, Great)

400W RMS Class D RD Series 4 Channel Car Amplifier

• 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

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-15% $322.99

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• 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

NVX MVPA2 (Open Box, Great)

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2 (Open Box, Great)

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

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-33% $191.99

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• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

NVX NBA201 (Open Box, Great)

1400W Peak (700W) RMS N-Series Class A/B 2-Channel Amplifier

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NVX NBA201 (Open Box, Great)

1400W Peak (700W) RMS N-Series Class A/B 2-Channel 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: 700 watts
• CEA-2006 Compliant

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-48% $129.99

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Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

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Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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List price $600.00
-42% $349.99

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• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

NVX VADM2 Version 2 (VADM2v2) (Open Box, Great)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Great)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports 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
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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List price $203.99
-19% $165.69

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Crunch GP-2000.2 (Open Box, Good)

2000W Peak Class AB GP Series 2-Channel Car Amplifier

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Crunch GP-2000.2 (Open Box, Good)

2000W Peak Class AB GP Series 2-Channel Car Amplifier

• 500 watts x 2 channel @ 4 ohm
• 1000 watts x 2 channel @ 2 ohm
• Bridged: 2000 watts x 1 channel @ 4 ohm
• Total Peak Power: 2000 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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List price $119.99
-63% $44.99

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• 500 watts x 2 channel @ 4 ohm
• 1000 watts x 2 channel @ 2 ohm
• Bridged: 2000 watts x 1 channel @ 4 ohm
• Total Peak Power: 2000 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

Wet Sounds SYN-DX4 (Open Box, Great)

800W Peak Class D SYN-DX Series 4 Channel Marine Amplifier

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Wet Sounds SYN-DX4 (Open Box, Great)

800W Peak Class D SYN-DX Series 4 Channel Marine Amplifier

• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $1199.99
-30% $839.99

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• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 4-Channel Amplifier

NVX VAD10004 (Open Box, Great)

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

VAD10004v2 big
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NVX VAD10004 (Open Box, Great)

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

• 150 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
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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List price $349.99
-34% $229.99

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Belva BXA6404 (Open Box, Good)

640W Peak BX-Series Class A/B 4-Channel Car Audio Amplifier

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Belva BXA6404 (Open Box, Good)

640W Peak BX-Series Class A/B 4-Channel Car Audio Amplifier

• 80 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total Peak Power: 640 watts
• Class A/B 2 ohm Stable 4-Channel-Channel

Save 30% off an NVX XKIT84 Amp Kit at Checkout!
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NVX XKIT84

NVX XKIT84

$79.99

$55.99

$24 Savings!

Add to cart

• 80 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total Peak Power: 640 watts
• Class A/B 2 ohm Stable 4-Channel-Channel

NVX NBA201 (Like New (Open Box))

1400W Peak (700W) RMS N-Series Class A/B 2-Channel Amplifier

NBA201 big
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NVX NBA201 (Like New (Open Box))

1400W Peak (700W) RMS N-Series Class A/B 2-Channel 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: 700 watts
• CEA-2006 Compliant

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List price $249.99
-44% $139.99

In stock

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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: 700 watts
• CEA-2006 Compliant

NVX VAD10004 (Like New (Open Box))

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

VAD10004v2 big
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NVX VAD10004 (Like New (Open Box))

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

• 150 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
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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List price $349.99
-31% $242.24

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Only 2 Left!

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Good)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Good)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports 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
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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List price $203.99
-50% $101.99

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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
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

Infinity DSP6840 (DSP6840AM) (Like New (Open Box))

1000W Peak (480W RMS) Class D DSP Series 8 Channel Car Amplifier with Digital Signal Processing

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Infinity DSP6840 (DSP6840AM) (Like New (Open Box))

1000W Peak (480W RMS) Class D DSP Series 8 Channel Car Amplifier with Digital Signal Processing

• 40 watts x 8 channel @ 4 ohm
• 60 watts x 8 channel @ 2 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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List price $539.95
-24% $412.21

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Only 1 Left!

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NVX MVPA2 (Like New (Open Box))

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2 (Like New (Open Box))

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

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List price $249.99
-32% $169.99

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Only 1 Left!

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• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 2020 Optima

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 2020 Kia Optima?

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

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    Shop your 2020 Optima
    Why Use a Vehicle Fit Guide?
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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