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1999 Toyota 4Runner

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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 1999 Toyota 4Runner

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 SXE-2000.4D/RD

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

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DS18 SXE-2000.4D/RD

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 3 channel @ 4 ohm
• Total RMS Power: 640 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Red Brushed Aluminum Body Color

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NVX MVPA6 (Open Box, Great)

Marine-V Series 900W 6-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

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NVX MVPA6 (Open Box, Great)

Marine-V Series 900W 6-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

• 100 Watts RMS x 6 @ 4 ohm
• 150 Watts RMS x 6 @ 2 ohm
• CEA-2006 Compliant
• Weatherproof Amplifier
• Micro Amp
• 12.9"W x 4.4"L x 1.7"H

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• 100 Watts RMS x 6 @ 4 ohm
• 150 Watts RMS x 6 @ 2 ohm
• CEA-2006 Compliant
• Weatherproof Amplifier
• Micro Amp
• 12.9"W x 4.4"L x 1.7"H

DS18 X2

1140W Peak (460W RMS) Class D X Series 2-Channel Compact Car Amplifier

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DS18 X2

1140W Peak (460W RMS) Class D X Series 2-Channel Compact Car Amplifier

• 140 watts x 2 channel @ 4 ohm
• 230 watts x 2 channel @ 2 ohm
• Bridged: 380 watts x 1 channel @ 4 ohm
• Total RMS Power: 460 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Rockford Fosgate Power T1000X5ad

1000W RMS Class AD/BD Power Series 5 Channel Car Amplifier

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Rockford Fosgate Power T1000X5ad

1000W RMS Class AD/BD Power Series 5 Channel Car Amplifier

• 100 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class AD / BD 2 ohm Stable 5-Channel Amplifier

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JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

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JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

• 150 watts x 4 channel (rated power from 1.5 to 4 ohm)
• Bridged: 300 watts x 2 channel (rated power from 4 to 8 ohm)
• Total RMS Power: 600 watts
• Class D 1.5 ohm Stable 4-Channel Amplifier

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Stinger SPX350X2

350W Peak (175W RMS) Class D SPX Series 2 Channel Powersports Amplifier with Bass Remote

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Stinger SPX350X2

350W Peak (175W RMS) Class D SPX Series 2 Channel Powersports Amplifier with Bass Remote

• 125 watts x 2 channel @ 4 ohm
• 175 watts x 2 channel @ 2 ohm
• Bridged: 350 watts x 1 channel @ 4 ohm
• Total RMS Power: 350 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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• 125 watts x 2 channel @ 4 ohm
• 175 watts x 2 channel @ 2 ohm
• Bridged: 350 watts x 1 channel @ 4 ohm
• Total RMS Power: 350 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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

Diamond Audio HXM800.4D

800W RMS Class D Motorsport Series 4-Channel Full Range Car, Marine and Powersport Amplifier with Bluetooth

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Diamond Audio HXM800.4D

800W RMS Class D Motorsport Series 4-Channel Full Range Car, Marine and Powersport Amplifier with Bluetooth

• 120 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 D 2 ohm Stable 4-Channel Amplifier

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DS18 G8400.4D

8400W Peak (4000W RMS) Class D Gen-X Series 4-Channel Car Amplifier

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DS18 G8400.4D

8400W Peak (4000W RMS) Class D Gen-X Series 4-Channel Car Amplifier

• 700 watts x 4 channel @ 4 ohm
• 1000 watts x 4 channel @ 2 ohm
• Bridged: 1700 watts x 2 channel @ 4 ohm
• Total RMS Power: 4000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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American Bass DB 675.2FR

500W Peak (260W RMS) Class AB DB Series 2 Channel Car Amplifier

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American Bass DB 675.2FR

500W Peak (260W RMS) Class AB DB Series 2 Channel Car Amplifier

• 75 watts x 2 channel @ 4 ohm
• 130 watts x 2 channel @ 2 ohm
• Bridged: 220 watts x 1 channel @ 4 ohm
• Total RMS Power: 260 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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NVX XKIT82

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DS18 SMD-300.4AB

1200W RMS Class AB SMD Series 4 Channel Car Amplifier with Bass Remote

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DS18 SMD-300.4AB

1200W RMS Class AB SMD Series 4 Channel Car Amplifier with Bass Remote

• 200 watts x 4 channel @ 4 ohm
• 300 watts x 4 channel @ 2 ohm
• Bridged: 600 watts x 2 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

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NVX XKIT04

NVX XKIT04

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Cerwin Vega B52

1000W Peak (500W RMS) Class D Stealth Bomber Series 2 Channel Car Amplifier with Bass Remote

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Cerwin Vega B52

1000W Peak (500W RMS) Class D Stealth Bomber Series 2 Channel Car Amplifier with Bass Remote

• 150 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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MB Quart RA1-150.2

100W RMS Class D Reference Series 2 Channel Car Amplifier

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MB Quart RA1-150.2

100W RMS Class D Reference Series 2 Channel Car Amplifier

• 50 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 D 2 ohm Stable 2-Channel Amplifier

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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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Cerwin-Vega XED4004D

400W Peak (360W RMS) Class D XED Series 4 Channel Car Amplifier

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Cerwin-Vega XED4004D

400W Peak (360W RMS) Class D XED Series 4 Channel Car Amplifier

• 60 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 170 watts x 2 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Diamond Audio DES1000.5D

1100W RMS Class D Diamond Elite Series 5-Channel Full Range Amplifier (with Bass Remote)

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Diamond Audio DES1000.5D

1100W RMS Class D Diamond Elite Series 5-Channel Full Range Amplifier (with Bass Remote)

• 90 watts x 4 channel + 150 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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Hertz Venezia V5C Compact

1010W RMS Venezia Series Class-D 5-Channel Marine Amplifier

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Hertz Venezia V5C Compact

1010W RMS Venezia Series Class-D 5-Channel Marine Amplifier

• 5 Channel: 80 watts x 4 channel + 330 watts x 1 channel (at 4 ohms)
• 5 Channel: 115 watts x 4 channel + 550 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel + 330 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel (at 4 ohms) + 550 watts x 1 channel (at 2 ohms)
• Total RMS Power: 1010 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 5 Channel: 80 watts x 4 channel + 330 watts x 1 channel (at 4 ohms)
• 5 Channel: 115 watts x 4 channel + 550 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel + 330 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel (at 4 ohms) + 550 watts x 1 channel (at 2 ohms)
• Total RMS Power: 1010 watts
• Class D 2 ohm Stable 5-Channel Amplifier

NVX VAD8402 (Open Box, Great)

840W RMS VAD Series Class-D 2-Channel Full-Range Car/Marine/Powersports Amplifier

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NVX VAD8402 (Open Box, Great)

840W RMS VAD Series Class-D 2-Channel Full-Range Car/Marine/Powersports Amplifier

• RMS: 300 x 2 @ 4 ohm, 420W x 2 @ 2 ohm, Bridged 840W x 1 @ 4 ohm
• Total RMS Power: 840W
• CEA-2006 Compliant
• Efficient Full Range Class D Design
• Dimensions: 10.1"W x 5.4"D x 2.0H

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NVX MVPA2

1200W Peak (600W RMS) Class D Marine-V Series 2-Channel Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2

1200W Peak (600W RMS) Class D Marine-V Series 2-Channel Marine/Powersports/Motorcycle 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 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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