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  1. Home
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  3. Discontinued Infinity Car Audio & Electronics
  4. Discontinued Infinity Car Amplifiers
  5. Discontinued Infinity All Car Amplifiers

Discontinued All Infinity Car Amplifiers

With Infinity All Car Amplifiers, enjoy robust power and clear sound.

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Amplifiers,
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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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Infinity Reference 551A

1300W Max (550W RMS) Reference Series Class-D Monoblock 2 Ohm Stable Amplifier with High Level Input Adapters Included

REF-551AAM big DISCONTINUED
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Infinity Reference 551A

1300W Max (550W RMS) Reference Series Class-D Monoblock 2 Ohm Stable Amplifier with High Level Input Adapters Included

• 370 Watts RMS x 1 @ 4 ohm
• 550 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1300 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

1

• 370 Watts RMS x 1 @ 4 ohm
• 550 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1300 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

Infinity Reference 5350a

5-Channel Reference Series Amplifier

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Infinity Reference 5350a

5-Channel Reference Series Amplifier

• Full-Range RMS: 50W x 4 @ 4 ohm, 60W x 4 @ 2 ohm
• Subwoofer RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• CEA-2006 Compliant
• 12 dB Per Octave Crossovers
• Class D Circuitry
• Dimensions: 9"L x 16-9/16"W x 2-11/16"H

14

• Full-Range RMS: 50W x 4 @ 4 ohm, 60W x 4 @ 2 ohm
• Subwoofer RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• CEA-2006 Compliant
• 12 dB Per Octave Crossovers
• Class D Circuitry
• Dimensions: 9"L x 16-9/16"W x 2-11/16"H

Infinity Reference 475a

468W Reference Series Class AB 4-Channel Amplifier

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Infinity Reference 475a

468W Reference Series Class AB 4-Channel Amplifier

• 75W x 4-Chan. @ 4 ohm
• 90W x 4-Chan. @ 2 ohm
• 117W x 4-Chan. Max
• MOSFET power supply
• Gold-plated preamp RCA outputs

20

• 75W x 4-Chan. @ 4 ohm
• 90W x 4-Chan. @ 2 ohm
• 117W x 4-Chan. Max
• MOSFET power supply
• Gold-plated preamp RCA outputs

Infinity Kappa K600 Amplifier + Alpine 12" Subwoofer + Free Amp Kit

Infinity Kappa 600W RMS Class-D Monoblock Amplifier + Alpine R-W12D2 Dual 2-Ohm Subwoofer + Belva Bak44bl (Blue)

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Infinity Kappa K600 Amplifier + Alpine 12" Subwoofer + Free Amp Kit

Infinity Kappa 600W RMS Class-D Monoblock Amplifier + Alpine R-W12D2 Dual 2-Ohm Subwoofer + Belva Bak44bl (Blue)

• 380 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1500 Watts
• Variable low-pass filter: 32 - 320 Hz
• Sleek, brushed steel industrial design
• Upgradable Firmware via the microUSB port
• Speaker-level (high-level) inputs

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• 380 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1500 Watts
• Variable low-pass filter: 32 - 320 Hz
• Sleek, brushed steel industrial design
• Upgradable Firmware via the microUSB port
• Speaker-level (high-level) inputs

Infinity Reference 704A Open Box (Complete)

1000W Peak (400W RMS) Reference Series 4-Channel Amplifier

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Infinity Reference 704A Open Box (Complete)

1000W Peak (400W RMS) Reference Series 4-Channel Amplifier

• 70 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

2

• 70 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

Infinity Reference 1600A

894W Max, Reference Series Class D Monoblock Amplifier

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Infinity Reference 1600A

894W Max, Reference Series Class D Monoblock Amplifier

• RMS: 400W x 1 @ 4 ohm, 600W x 1 @ 2 ohm
• Total RMS Power: 600W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/16"L x 9"W x 2-11/16H

24

• RMS: 400W x 1 @ 4 ohm, 600W x 1 @ 2 ohm
• Total RMS Power: 600W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/16"L x 9"W x 2-11/16H

Infinity K600 Kappa Series Amplifier (Open Box)

1500W Peak (600W RMS) High Performance Kappa Series Class-D Monoblock 2-Ohm Stable Car Subwoofer Amplifier

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Infinity K600 Kappa Series Amplifier (Open Box)

1500W Peak (600W RMS) High Performance Kappa Series Class-D Monoblock 2-Ohm Stable Car Subwoofer Amplifier

• Item Condition: Like New Open Box
• 380 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1500 Watts
• Variable low-pass filter: 32 - 320 Hz
• Sleek, brushed steel industrial design
• Upgradable Firmware via the microUSB port
• Speaker-level (high-level) inputs

• Item Condition: Like New Open Box
• 380 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1500 Watts
• Variable low-pass filter: 32 - 320 Hz
• Sleek, brushed steel industrial design
• Upgradable Firmware via the microUSB port
• Speaker-level (high-level) inputs

Infinity K5 Amplifier with Clari-fi Technology (Open Box)

2300W Peak (750W RMS) High Performance Kappa Series Class-D 5-Channel 2-Ohm Stable Amplifier with Bluetooth and Clari-Fi Technology

K5-3 big DISCONTINUED
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Infinity K5 Amplifier with Clari-fi Technology (Open Box)

2300W Peak (750W RMS) High Performance Kappa Series Class-D 5-Channel 2-Ohm Stable Amplifier with Bluetooth and Clari-Fi Technology

• Item Condition: Like New Open Box
• 75 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• 200 Watts RMS x 2 @ 4 ohm Bridged
• Subwoofer Channel: 4 ohm: 200 watts x 1 chan.
• 2 ohm: 350 watts x 1 chan.
• Total Peak Power: 1500 Watts
• Bluetooth Streaming
• Clari-fi Technology
• Wired control panel
• Speaker-level (high-level) inputs

2

• Item Condition: Like New Open Box
• 75 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• 200 Watts RMS x 2 @ 4 ohm Bridged
• Subwoofer Channel: 4 ohm: 200 watts x 1 chan.
• 2 ohm: 350 watts x 1 chan.
• Total Peak Power: 1500 Watts
• Bluetooth Streaming
• Clari-fi Technology
• Wired control panel
• Speaker-level (high-level) inputs

Infinity PRIMUS-3000A Open Box

600W Max (300W RMS) Primus Series 2 ohm Stable Monoblock Class-D Amplifier

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Infinity PRIMUS-3000A Open Box

600W Max (300W RMS) Primus Series 2 ohm Stable Monoblock Class-D Amplifier

• 300 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 600 Watts
• Variable low-pass filter: 32 - 320 Hz, 24 dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 45 Hz
• 0 to 180 degree Phase Output
• Dimensions: 12.3" W x 7.4" L x 3.74" H

• 300 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 600 Watts
• Variable low-pass filter: 32 - 320 Hz, 24 dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 45 Hz
• 0 to 180 degree Phase Output
• Dimensions: 12.3" W x 7.4" L x 3.74" H

Infinity Reference 4555A Open Box (Complete)

1800W Peak (760W RMS) Reference Series 5-Channel Amplifier

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Infinity Reference 4555A Open Box (Complete)

1800W Peak (760W RMS) Reference Series 5-Channel Amplifier

• 45 Watts RMS x 4 + 320 Watts x 1 @ 4 ohm
• 65 Watts RMS x 2 + 500 Watts x 1 @ 2 ohm
• Total Peak Power: 1800 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

6

• 45 Watts RMS x 4 + 320 Watts x 1 @ 4 ohm
• 65 Watts RMS x 2 + 500 Watts x 1 @ 2 ohm
• Total Peak Power: 1800 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

Infinity K4 Amplifier with Clari-fi Technology (Open Box)

1500W Peak (480W RMS) High Performance Kappa Series Class-D 4-Channel 2-Ohm Stable Amplifier with Bluetooth and Clari-Fi Technology

K4-2 big DISCONTINUED
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Infinity K4 Amplifier with Clari-fi Technology (Open Box)

1500W Peak (480W RMS) High Performance Kappa Series Class-D 4-Channel 2-Ohm Stable Amplifier with Bluetooth and Clari-Fi Technology

• Item Condition: Like New Open Box
• 100 Watts RMS x 4 @ 4 ohm
• 120 Watts RMS x 4 @ 2 ohm
• 240 Watts RMS x 2 @ 4 ohm Bridged
• Total Peak Power: 1500 Watts
• Bluetooth Streaming
• Clari-fi™ Technology
• Wired control panel
• Speaker-level (high-level) inputs

• Item Condition: Like New Open Box
• 100 Watts RMS x 4 @ 4 ohm
• 120 Watts RMS x 4 @ 2 ohm
• 240 Watts RMS x 2 @ 4 ohm Bridged
• Total Peak Power: 1500 Watts
• Bluetooth Streaming
• Clari-fi™ Technology
• Wired control panel
• Speaker-level (high-level) inputs

Infinity Kappa Five

2300W Peak (750W RMS) Kappa Series Class-D 5-Channel Amplifier with Bass Remote

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Infinity Kappa Five

2300W Peak (750W RMS) Kappa Series Class-D 5-Channel Amplifier with Bass Remote

• 75 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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13

• 75 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Infinity KAPPA FIVE Open Box

(Open Box) 1200W Max, Kappa Series 5-Channel Amplifier

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Infinity KAPPA FIVE Open Box

(Open Box) 1200W Max, Kappa Series 5-Channel Amplifier

Kappa Series 5-Channel Class D Car Amplifier • 50 Watts x 4 Chan. @ 4 Ohm • 75 Watts x 4 Chan. @ 2 Ohm • DirectFET Technology Transistors • Dynamic Bass Optimization • Non-Stop Thermal Protection •

Kappa Series 5-Channel Class D Car Amplifier • 50 Watts x 4 Chan. @ 4 Ohm • 75 Watts x 4 Chan. @ 2 Ohm • DirectFET Technology Transistors • Dynamic Bass Optimization • Non-Stop Thermal Protection •

Infinity Reference 551AAM (551A)

1300W Max (550W RMS) Reference Series Class-D Monoblock 2 Ohm Stable Amplifier with High Level Input Adapters Included

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Infinity Reference 551AAM (551A)

1300W Max (550W RMS) Reference Series Class-D Monoblock 2 Ohm Stable Amplifier with High Level Input Adapters Included

• 370 Watts RMS x 1 @ 4 ohm
• 550 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1300 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

• 370 Watts RMS x 1 @ 4 ohm
• 550 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1300 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

Infinity KAPPA ONE (Open Box, Good)

1600W Max, Kappa Series Class D Mono Subwoofer Amplifier

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Infinity KAPPA ONE (Open Box, Good)

1600W Max, Kappa Series Class D Mono Subwoofer Amplifier

• RMS: 500 x 1 @ 4 ohm, 800W x 1 @ 2 ohm
• Total Peak Power: 1600W
• CEA-2006 Compliant
• Bass Boost: 0 - 12 dB
• Non-Stop Thermal Protection
• Dimensions: 13"L x 7-1/16W x 1-3/4H

• RMS: 500 x 1 @ 4 ohm, 800W x 1 @ 2 ohm
• Total Peak Power: 1600W
• CEA-2006 Compliant
• Bass Boost: 0 - 12 dB
• Non-Stop Thermal Protection
• Dimensions: 13"L x 7-1/16W x 1-3/4H

Infinity KAPPA ONE K

1000W Class D Monoblock Subwoofer Amplifier

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Infinity KAPPA ONE K

1000W Class D Monoblock Subwoofer Amplifier

• Infinity KAPPAONEK Class-D Mono Amplifier
• Peak Power Output: 2600 watts x 1 chan.
• 4 ohm: 700 watts x 1 chan.
• 2 ohm: 1000 watts x 1 chan.
• Frequency Response: 10 - 320 Hz
• Variable Bass Boost: 0 to +12 dB bass boost
• Fuse Rating: 35 A x 3
• 13-1/8"W x 7"D x 1-3/4"H

• Infinity KAPPAONEK Class-D Mono Amplifier
• Peak Power Output: 2600 watts x 1 chan.
• 4 ohm: 700 watts x 1 chan.
• 2 ohm: 1000 watts x 1 chan.
• Frequency Response: 10 - 320 Hz
• Variable Bass Boost: 0 to +12 dB bass boost
• Fuse Rating: 35 A x 3
• 13-1/8"W x 7"D x 1-3/4"H

Infinity Kappa Four (Like New (Open Box))

1500W Peak (480W RMS) Kappa Series Class-D 4-Channel Amplifier

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Infinity Kappa Four (Like New (Open Box))

1500W Peak (480W RMS) Kappa Series Class-D 4-Channel Amplifier

• 100 watts x 4 channel @ 4 ohm
• 120 watts x 4 channel @ 2 ohm
• Bridged: 240 watts x 2 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 4-Channel Amplifier

• 100 watts x 4 channel @ 4 ohm
• 120 watts x 4 channel @ 2 ohm
• Bridged: 240 watts x 2 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Infinity KAPPA FOUR

1200W Kappa Series 4-Channel Amplifier

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Infinity KAPPA FOUR

1200W Kappa Series 4-Channel Amplifier

• 125W x 4-Chan. @ 4 Ohm
• 150W x 4-Chan. @ 2 Ohm
• 300W x 4-Chan. Max
• Tuned Bass EQ
• Speaker-level Inputs
• Variable High and Low Pass Filters
• 4/3/2 Channel Operation

22

• 125W x 4-Chan. @ 4 Ohm
• 150W x 4-Chan. @ 2 Ohm
• 300W x 4-Chan. Max
• Tuned Bass EQ
• Speaker-level Inputs
• Variable High and Low Pass Filters
• 4/3/2 Channel Operation

Infinity Primus 6004A

560W Peak (280W RMS) Primus Series Class-D 4-Channel Amplifier

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Infinity Primus 6004A

560W Peak (280W RMS) Primus Series Class-D 4-Channel Amplifier

• 60 watts x 4 channel @ 4 ohm
• 70 watts x 4 channel @ 2 ohm
• Bridged: 140 watts x 2 channel @ 4 ohm
• Total RMS Power: 280 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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1

• 60 watts x 4 channel @ 4 ohm
• 70 watts x 4 channel @ 2 ohm
• Bridged: 140 watts x 2 channel @ 4 ohm
• Total RMS Power: 280 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Infinity Primus 6002A

280W Max (140W RMS) Primus Series 4 ohm Stable 2-Channel Class-D Amplifier

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Infinity Primus 6002A

280W Max (140W RMS) Primus Series 4 ohm Stable 2-Channel Class-D Amplifier

• 60 Watts RMS x 2 @ 4 ohm
• 70 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 280 Watts
• HPF/LPF/FPF
• 0 to +12 dB Bass Boost
• Heavy duty aluminum alloy heat-sink
• 12.3" x 7.4" x 3.74"

• 60 Watts RMS x 2 @ 4 ohm
• 70 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 280 Watts
• HPF/LPF/FPF
• 0 to +12 dB Bass Boost
• Heavy duty aluminum alloy heat-sink
• 12.3" x 7.4" x 3.74"

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    Infinity All Car Amplifiers Information

    All car amplifiers from Infinity are built from highly durable materials and with quality in mind. With various power ratings and max power output, Infinity has a wide array of options to suit your system. When thinking of car amplifiers, think Infinity.
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