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

Discontinued Infinity Monoblock Amplifiers

Deep, impactful bass is the hallmark of Infinity's Monoblock 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 PRIMUS-3000A Open Box

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

No picture DISCONTINUED
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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 1600a Open Box

(Open Box) Max, Reference Series Class D Monoblock Amplifier (REF1600A)

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Infinity Reference 1600a Open Box

(Open Box) Max, Reference Series Class D Monoblock Amplifier (REF1600A)

Reference Series Class D Monoblock Amplifier • 400W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

Reference Series Class D Monoblock Amplifier • 400W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

Infinity 310a Reference Series

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Infinity 310a Reference Series

312 watts RMS x 1 at 2 ohm • low-pass filter • Dynamic Bass Optimization circuit • preamp outputs

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312 watts RMS x 1 at 2 ohm • low-pass filter • Dynamic Bass Optimization circuit • preamp outputs

Infinity 611A R/B

456W RMS Class D Monoblock Amplifier

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Infinity 611A R/B

456W RMS Class D Monoblock Amplifier

Infinity Systems 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 650W x 1 chan. Max • Tuned Bass EQ (0-12 dB bass boost at 20-80 Hz) • Preamp RCA outputs

Infinity Systems 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 650W x 1 chan. Max • Tuned Bass EQ (0-12 dB bass boost at 20-80 Hz) • Preamp RCA outputs

Infinity Reference 1300a R/B

(Factory Refurbished) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

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Infinity Reference 1300a R/B

(Factory Refurbished) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

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Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

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 Reference 1300a Open Box

(Open Box) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

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Infinity Reference 1300a Open Box

(Open Box) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs

Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs

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 Reference 1001A (AMPRF1001AAM)

Reference Series High Performance Monoblock Subwoofer Amplifier

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Infinity Reference 1001A (AMPRF1001AAM)

Reference Series High Performance Monoblock Subwoofer Amplifier

• Monoblock Amplifier
• 4 Ohm: 600 Watts RMS x 1
• 2 Ohm: 1000 Watts RMS x 1
• Wired Remote Level Control
• Turn-On Mode Switch
• Strappable Amplifier

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• Monoblock Amplifier
• 4 Ohm: 600 Watts RMS x 1
• 2 Ohm: 1000 Watts RMS x 1
• Wired Remote Level Control
• Turn-On Mode Switch
• Strappable Amplifier

Infinity Reference 6001A

600W RMS Reference Series Class-D Monoblock Amplifier with Bass Remote

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Infinity Reference 6001A

600W RMS Reference Series Class-D Monoblock Amplifier with Bass Remote

• Class D Amplifier
• 4 Ohm: 350 Watts RMS x 1
• 2 Ohm: 600 Watts RMS x 1
• Variable Low-Pass Filter
• Phase Switch

• Class D Amplifier
• 4 Ohm: 350 Watts RMS x 1
• 2 Ohm: 600 Watts RMS x 1
• Variable Low-Pass Filter
• Phase Switch

Infinity Reference 10001A (AMPRF10001AAM)

Reference Series 1000 Watts RMS Monoblock Class-D Amplifier

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Infinity Reference 10001A (AMPRF10001AAM)

Reference Series 1000 Watts RMS Monoblock Class-D Amplifier

• 600 Watts RMS x 1 @ 4 ohm
• 1000 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 2000 Watts
• Preamp Outputs/LPF
• Variable Bass Boost
• 12-5/8"W x 2-3/16"D x 7-1/8"H

• 600 Watts RMS x 1 @ 4 ohm
• 1000 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 2000 Watts
• Preamp Outputs/LPF
• Variable Bass Boost
• 12-5/8"W x 2-3/16"D x 7-1/8"H

Infinity Kappa One 6 (KAPPAONE6AM) (Like New (Open Box))

1500W Peak (600W RMS) Class D Kappa Series Monoblock Car Amplifier with Bass Remote

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Infinity Kappa One 6 (KAPPAONE6AM) (Like New (Open Box))

1500W Peak (600W RMS) Class D Kappa Series Monoblock Car Amplifier with Bass Remote

• 380 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

• 380 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

Infinity Kappa One K (KAPPAONEKAM) (Open Box, Good)

2600W Peak (1000W RMS) Kappa Series Class-D Monoblock Amplifier with Bass Remote

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Infinity Kappa One K (KAPPAONEKAM) (Open Box, Good)

2600W Peak (1000W RMS) Kappa Series Class-D Monoblock Amplifier with Bass Remote

• 700 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier

• 700 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier

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    Infinity Monoblock Amplifiers Information

    The Infinity monoblock amplifiers are designed for efficient power output. These amps take up little space and feature high quality platinum finished connections, and solid power ratings. You won't be disappointed with your Infinity monoblock amplifier for your vehicle's needs.
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