Garage
Shop

Discontinued Infinity Monoblock Amplifiers

Deep, impactful bass is the hallmark of Infinity's Monoblock Amplifiers.

Loading...
Match Amps to Subs
Filters

Find compatible amplifiers for subs you own or want with our powerful AmpliFinder® tool.

Match Amps to Subs

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.

Infinity Kappa One K (KAPPAONEKAM)

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

Go to item page Right Arrow Icon of Right Arrow

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

Infinity Primus 3000a

600W Peak (300W RMS) Primus Series Class-D Monoblock Amplifier

Go to item page Right Arrow Icon of Right Arrow

600W Peak (300W RMS) Primus Series Class-D Monoblock Amplifier

• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

Infinity MARINE M6001A

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

Go to item page Right Arrow Icon of Right Arrow

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

• 350 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

• 350 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 K1000 Monoblock Amplifier

2600W Peak (700W RMS) High Performance Kappa Series Class-D Monoblock 2-Ohm Stable Car Subwoofer Amplifier

Go to item page Right Arrow Icon of Right Arrow

2600W Peak (700W RMS) High Performance Kappa Series Class-D Monoblock 2-Ohm Stable Car Subwoofer Amplifier

• 700 Watts RMS x 1 @ 4 ohm
• 1000 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 2600 Watts
• Variable low-pass filter: 32 - 320 Hz
• Sleek, brushed steel industrial design
• Upgradable Firmware via the microUSB port
• Speaker-level (high-level) inputs

• 700 Watts RMS x 1 @ 4 ohm
• 1000 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 2600 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 Kappa K600

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

Go to item page Right Arrow Icon of Right Arrow

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

• 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

• 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 551A (REF-551A)

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

Go to item page Right Arrow Icon of Right Arrow

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

VIP Star Icon

VIP Product Get $20.00 in rewards to spend later

• 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

342W Max, Reference Series Class D Monoblock Amplifier

Go to item page Right Arrow Icon of Right Arrow

342W Max, Reference Series Class D Monoblock Amplifier

• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/4"L x 9"W x 2-11/16H

• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/4"L x 9"W x 2-11/16H

Infinity Reference 1211a

Class D Monoblock Amplifier (REF1211A)

Go to item page Right Arrow Icon of Right Arrow

Class D Monoblock Amplifier (REF1211A)

1516 watts max • Supports remote subwoofer control • • MOSFET power supply • Preamp outputs • Dynamic Base Optimizer

1516 watts max • Supports remote subwoofer control • • MOSFET power supply • Preamp outputs • Dynamic Base Optimizer

Infinity Kappa One 6 (KAPPAONE6AM)

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

Go to item page Right Arrow Icon of Right Arrow

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

1600W Max, Kappa Series Class D Mono Subwoofer Amplifier

Go to item page Right Arrow Icon of Right Arrow

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 Reference 551A

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

Go to item page Right Arrow Icon of Right Arrow

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 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)

Go to item page Right Arrow Icon of Right Arrow

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

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

600W RMS Infinity Kappa Monoblock 2-Ohm Stable Amplifier + Alpine R-W12D2 Dual 2-Ohm Subwoofer + Belva Bak44

Go to item page Right Arrow Icon of Right Arrow

600W RMS Infinity Kappa Monoblock 2-Ohm Stable Amplifier + Alpine R-W12D2 Dual 2-Ohm Subwoofer + Belva Bak44

• 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

• 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 1300a Amp + (2) JBL 10" Subs + High-End Amp Kit

Combo Package with Reference Amplifier + JBL 10" Subs and an Amp Kit

Go to item page Right Arrow Icon of Right Arrow

Combo Package with Reference Amplifier + JBL 10" Subs and an Amp Kit

• Includes amp, subs and a wiring kit -- Everything but a sub box!
• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/4"L x 9"W x 2-11/16H

• Includes amp, subs and a wiring kit -- Everything but a sub box!
• RMS: 200W x 1 @ 4 ohm, 300W x 1 @ 2 ohm
• Total RMS Power: 300W
• CEA-2006 Compliant
• Bass Boost: 0-6 dB
• Class D Circuitry
• Dimensions: 14-3/4"L x 9"W x 2-11/16H

Infinity 611A

Class D Monoblock Amplifier

Go to item page Right Arrow Icon of Right Arrow

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 311a

347W Max, Class A/B Monoblock Amplifier (REF311A)

Go to item page Right Arrow Icon of Right Arrow

347W Max, Class A/B Monoblock Amplifier (REF311A)

Infinity Reference Class AB Monoblock Amplifier • Max Power: 347W x 1 chan. • RMS: 312W x 1 chan. @ 2 ohm • RMS: 116W x 1 chan. @ 4 ohm • 0-12 dB Bass Boost

Infinity Reference Class AB Monoblock Amplifier • Max Power: 347W x 1 chan. • RMS: 312W x 1 chan. @ 2 ohm • RMS: 116W x 1 chan. @ 4 ohm • 0-12 dB Bass Boost

EXCLUSIVE

Infinity Subwoofer + Kicker Amplifier Upgrade w/ Sub Enclosure

REF1200S 1000W 12" Shallow Mount Subwoofer + KX200.2 KX Series 2-Ch Amp + XKIT82 2-Ch 8G Amp Install Kit + 12SME 12" Sub Enclosure

Go to item page Right Arrow Icon of Right Arrow

REF1200S 1000W 12" Shallow Mount Subwoofer + KX200.2 KX Series 2-Ch Amp + XKIT82 2-Ch 8G Amp Install Kit + 12SME 12" Sub Enclosure

• Subwoofer: RMS Power: 250W
• Amplifier: 50W x 2 Chan. @ 4 ohm
• 100W x 2 Chan. @ 2 ohm
• 8 Gauge 2-Channel Complete Amplifier Installation Kit
• 12" Single Sealed Ultra Slim Series Subwoofer Enclosure

• Subwoofer: RMS Power: 250W
• Amplifier: 50W x 2 Chan. @ 4 ohm
• 100W x 2 Chan. @ 2 ohm
• 8 Gauge 2-Channel Complete Amplifier Installation Kit
• 12" Single Sealed Ultra Slim Series Subwoofer Enclosure

Infinity Reference 1600A

894W Max, Reference Series Class D Monoblock Amplifier

Go to item page Right Arrow Icon of Right Arrow

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

• 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

Go to item page Right Arrow Icon of Right Arrow

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

Go to item page Right Arrow Icon of Right Arrow

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

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

Items per page: 20 40 60

    Clear all

    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.
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    1987 Ford E Series

    1981 Cadillac Eldorado

    1991 Mitsubishi Eclipse

    1990 Nissan Sentra

    2015 Tesla Model S

    2015 Jaguar XK

    2001 GMC Sonoma

    2015 Lexus IS250C

    2024 Audi e-tron Sportback

    1995 Eagle Vision

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This page was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

    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.