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  2. Rockford Fosgate Store
  3. Rockford Fosgate Car Audio & Electronics
  4. Rockford Fosgate Car Amplifiers
  5. Rockford Fosgate 4-Channel Amplifiers
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Rockford Fosgate 4-Channel Amplifiers

Versatile and robust, Rockford Fosgate's 4-channel amplifiers enhance any audio system.

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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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Rockford Fosgate Punch P400X4

400W RMS Class AB Punch Series 4 Channel Car Amplifier

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Rockford Fosgate Punch P400X4

400W RMS Class AB Punch 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 A/B 2 ohm Stable 4-Channel Amplifier

FREE Amp Kit at Checkout! Shop deal
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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VIP Product Get $37.00 in rewards to spend later

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$369.99

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Used from: $369.99 Like New from: $369.99

Rockford Fosgate Prime R2 R2-500X4

500W RMS Class D Prime Series 4 Channel Car Amplifier

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Rockford Fosgate Prime R2 R2-500X4

500W RMS Class D Prime Series 4 Channel Car Amplifier

• 75 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 Amplifier

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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Used from: $251.99 Like New from: $305.99

Rockford Fosgate Punch PBR400X4D

400W RMS Class D Punch Series 4 Channel Car Amplifier

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Rockford Fosgate Punch PBR400X4D

400W RMS Class D Punch 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 Amplifier

FREE Amp Kit at Checkout! Shop deal
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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VIP Product Get $31.00 in rewards to spend later

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Used from: $216.99 Like New from: $263.49

Rockford Fosgate Power T1000-4AD

1000W RMS Class AD Power Series 4 Channel Car Amplifier

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Rockford Fosgate Power T1000-4AD

1000W RMS Class AD Power Series 4 Channel Car Amplifier

• 250 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 AD 1 ohm Stable 4-Channel Amplifier

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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Used from: $769.99 Like New from: $1,044.99

Rockford Fosgate Punch P600X4

600W RMS Class AB Punch Series 4 Channel Car Amplifier

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Rockford Fosgate Punch P600X4

600W RMS Class AB Punch Series 4 Channel Car Amplifier

• 75 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 A/B 2 ohm Stable 4-Channel Amplifier

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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Used from: $356.99 Like New from: $433.49

Rockford Fosgate Prime R2 R2-300X4

300W RMS Class D Prime Series 4 Channel Car Amplifier

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Rockford Fosgate Prime R2 R2-300X4

300W RMS Class D Prime 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

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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VIP Product Get $31.00 in rewards to spend later

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Used from: $216.99 Like New from: $263.49

Rockford Fosgate Power T400-4

400W RMS Class AB Power Series 4 Channel Car Amplifier

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Rockford Fosgate Power T400-4

400W RMS Class AB Power Series 4 Channel Car Amplifier

• 60 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 A/B 2 ohm Stable 4-Channel Amplifier

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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Rockford Fosgate Punch P600X4 (Open Box, Great)

600W RMS Class AB Punch Series 4 Channel Car Amplifier

P600X4 big
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Rockford Fosgate Punch P600X4 (Open Box, Great)

600W RMS Class AB Punch Series 4 Channel Car Amplifier

• 75 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 A/B 2 ohm Stable 4-Channel Amplifier

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FREE 2-day shipping to OH. Get it Thu, Nov. 20

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$356.99

In stock

Add to Cart

• 75 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 A/B 2 ohm Stable 4-Channel Amplifier

Rockford Fosgate Power T400X4ad

400W RMS Class AD Power Series 4 Channel Car Amplifier

T400X4AD big
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Rockford Fosgate Power T400X4ad

400W RMS Class AD Power Series 4 Channel Car Amplifier

• 100 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 AD 2 ohm Stable 4-Channel Amplifier

FREE Amp Kit at Checkout!
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FREE 2-day shipping to OH. Get it Thu, Nov. 20
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VIP Product Get $57.00 in rewards to spend later

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$569.99

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Only 1 Left!

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Used from: $398.99 Like New from: $484.49

Rockford Fosgate Prime R300X4

300W 4-Channel Class AB Prime Series Full Range Amplifier

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Rockford Fosgate Prime R300X4

300W 4-Channel Class AB Prime Series Full Range Amplifier

• 50W x 4-Chan. @ 4 ohm
• 75W x 4-Chan. @ 2 ohm
• 150W x 2 Chan. @ 4 ohm Bridged
• Selectable Bass Boost, Punch EQ
• Variable High-Pass & Low-Pass Crossover
• CEA-2006 Compliant
• Soft Start Turn-On

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FREE 2-day shipping to OH. Get it Thu, Nov. 20

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$279.99

In stock

Add to Cart

• 50W x 4-Chan. @ 4 ohm
• 75W x 4-Chan. @ 2 ohm
• 150W x 2 Chan. @ 4 ohm Bridged
• Selectable Bass Boost, Punch EQ
• Variable High-Pass & Low-Pass Crossover
• CEA-2006 Compliant
• Soft Start Turn-On

Lowest price in 30 days

Rockford Fosgate Prime R2-500X4 (Open Box, Great)

500W RMS Class D Prime Series 4 Channel Car Amplifier

R2-500X4 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Prime R2-500X4 (Open Box, Great)

500W RMS Class D Prime Series 4 Channel Car Amplifier

• 75 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 Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

7
Was $359.99 Details
$251.99

In stock

Add to Cart

• 75 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 Amplifier

Lowest price in 30 days

Rockford Fosgate Power T400-4 (Open Box, Great)

400W RMS Class AB Power Series 4 Channel Car Amplifier

T400-4 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Power T400-4 (Open Box, Great)

400W RMS Class AB Power Series 4 Channel Car Amplifier

• 60 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 A/B 2 ohm Stable 4-Channel Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

30
Was $439.99 Details
$307.99

In stock

Add to Cart

• 60 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 A/B 2 ohm Stable 4-Channel Amplifier

Lowest price in 30 days

Rockford Fosgate PBR400X4D (Open Box, Great)

400W RMS Class D Punch Series 4 Channel Car Amplifier

PBR400X4D big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate PBR400X4D (Open Box, Great)

400W RMS Class D Punch 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 Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

3
Was $309.99 Details
$216.99

In stock

Add to Cart

• 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 Amplifier

Lowest price in 30 days

Rockford Fosgate Power T1000-4AD (Open Box, Great)

1000W RMS Class AD Power Series 4 Channel Car Amplifier

T1000-4AD big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Power T1000-4AD (Open Box, Great)

1000W RMS Class AD Power Series 4 Channel Car Amplifier

• 250 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 AD 1 ohm Stable 4-Channel Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

13
Was $1099.99 Details
$769.99

In stock

Add to Cart

• 250 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 AD 1 ohm Stable 4-Channel Amplifier

Lowest price in 30 days

Rockford Fosgate R2-300X4 (Open Box, Great)

300W RMS Class D Prime Series 4 Channel Car Amplifier

R2-300X4 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate R2-300X4 (Open Box, Great)

300W RMS Class D Prime 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

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

4
Was $309.99 Details
$216.99

In stock

Add to Cart

• 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

Lowest price in 30 days

Rockford Fosgate Prime R2-500X4 (Open Box, Like New)

500W RMS Class D Prime Series 4 Channel Car Amplifier

R2-500X4 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Prime R2-500X4 (Open Box, Like New)

500W RMS Class D Prime Series 4 Channel Car Amplifier

• 75 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 Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

7
Was $359.99 Details
$305.99

In stock

Only 1 Left!

Add to Cart

• 75 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 Amplifier

Rockford Fosgate PBR400X4D - New (Damaged Packaging, Product A+)

400W 4 Channel Punch Series Class D Amplifier

PBR400X4D big
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Rockford Fosgate PBR400X4D - New (Damaged Packaging, Product A+)

400W 4 Channel Punch Series Class D Amplifier

• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 400 Watts
• CEA-2006 Compliant
• C.L.E.A.N. input/output clip detection and indicator LEDs
• Compact design for stealth installations
• 4.25"W x 1.53"H x 6.75"D

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FREE 2-day shipping to OH. Get it Thu, Nov. 20

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3
Was $309.99 Details
$263.49

In stock

Add to Cart

• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 400 Watts
• CEA-2006 Compliant
• C.L.E.A.N. input/output clip detection and indicator LEDs
• Compact design for stealth installations
• 4.25"W x 1.53"H x 6.75"D

Rockford Fosgate R2-500X4 - New (Damaged Packaging, Product A+)

Rockford Prime 500W 4-Channel Full Range Class D Amplifier

R2-500X4 big
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Rockford Fosgate R2-500X4 - New (Damaged Packaging, Product A+)

Rockford Prime 500W 4-Channel Full Range Class D Amplifier

• 75 Watts RMS x 4 @ 4 ohm
• 125 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 500 Watts
• CEA-2006 Compliant
• Top Mounted Control Panel

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FREE 2-day shipping to OH. Get it Thu, Nov. 20

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7
Was $359.99 Details
$323.99

In stock

Only 1 Left!

Add to Cart

• 75 Watts RMS x 4 @ 4 ohm
• 125 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 500 Watts
• CEA-2006 Compliant
• Top Mounted Control Panel

Lowest price in 30 days

Rockford Fosgate Power T400X4ad (Open Box, Great)

400W RMS Class AD Power Series 4 Channel Car Amplifier

T400X4AD big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Power T400X4ad (Open Box, Great)

400W RMS Class AD Power Series 4 Channel Car Amplifier

• 100 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 AD 2 ohm Stable 4-Channel Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

2
Was $569.99 Details
$398.99

In stock

Add to Cart

• 100 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 AD 2 ohm Stable 4-Channel Amplifier

Rockford Fosgate Punch P400X4 (Open Box, Great)

400W RMS Class AB Punch Series 4 Channel Car Amplifier

P400X4 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Punch P400X4 (Open Box, Great)

400W RMS Class AB Punch 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 A/B 2 ohm Stable 4-Channel Amplifier

shipping truck icon
FREE 2-day shipping to OH. Get it Thu, Nov. 20

empty

20
$369.99

In stock

Add to Cart

• 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 A/B 2 ohm Stable 4-Channel Amplifier

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    Rockford Fosgate 4-Channel Amplifiers Information

    A 4 channel car amplifier from Rockford Fosgate will provide your vehicle with the power it requires. These amps can operate four channels and Rockford Fosgate is a leader in amplification solutions. Power your speakers with a Rockford Fosgate 4-channel amplifier for a great all around sound.
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