Expert Service 1-877-289-7664 [Hours]

Presidents' Day Clearance
Amp up your factory system with quality car amplifiers. Find a large selection of monoblock amps including Class D, mini amps, micro amps and other car amps for subwoofers. Shop now!
Narrow Your Results

Your Filters

Clear All
Total RMS Power Output
Minimum Impedance Bridged
Price range:
$59.99 $1199.99
$
to
$

Amplifier Class:

Number of Channels:

Minimum Impedance Unbridged:

Bass/Gain Remote:

Sonic Certified Amplifier:

Speaker Level Inputs:

CEA-2006 Compliant:

Amp Bluetooth Connectivity:

1500W Max Anarchy Series Monoblock Power Amplifier

• 4 ohms: 700 watts x 1 chan.
• 2 ohms: 1100 watts x 1 chan.
• Peak: 1500W x 1 @ 2 ohms
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 10"L x 10"W x 2-3/16"H

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$59.99

IN STOCK

1500 Watt RMS Class D Monoblock HFi Series 1-Ohm Stable Subwoofer Amplifier (HFi 1500D)

• 4 ohms: 500 watts x 1 chan.
• 2 ohms: 1000 watts x 1 chan.
• 1 ohms: 1500 watts x 1 chan.
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$149.99

IN STOCK

1200W RMS Prime Series Monoblock Class D Car Amplifier

• RMS: 400W x 1 @ 4 ohms, 800W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total RMS Power: 1200W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Class D Circuitry
• Dimensions: 6-3/4"L x 11-1/16"W x 2"H

Get 10% off a Rockford Fosgate Hybrid 1.0 Farad Capacitor!

$239.99

IN STOCK

1500W Consumer Line Series Monoblock Class D Amplifier

• RMS Power: 600W x 1 @ 4 ohms, 950W x 1 @ 2 ohms
• Total Peak Power: 1500W
• Adjustable Low Pass Filter
• High Quality Aluminum Heat Sink
• Dimensions: 6.9" W x 14" L x 2.16" H

Save 25% on a 4 Gauge Amp Kit with Purchase!

$161.97

IN STOCK

1500 Watt Monoblock Brutus Series Super Class D 1-Ohm Stable Subwoofer Amplifier - (Brutus 1500 Watt)

• RMS Power: 550W x 1 @ 4 ohms, 900W x 1 @ 2 ohms, 1500W x 1 @ 1 ohm
• Total Peak Power: 1500W
• Wired remote bass level control included
• Heavy duty aluminum alloy heat-sink with illuminated Hifonics logo
• 1-Ohm Stable operation
• Variable Bass Boost: 0 to +10 dB
• Variable Low Pass Filter
• Dimensions: 9.8" W x 12.5" L x 2.4" H

15% Off of XKIT42 OFC Amplifier Install Kit with Purchase!

$174.99

IN STOCK

1200W RMS GM Digital Champion Series Class D Monoblock Amplifier

• RMS: 500W x 1 @ 4 ohms, 800W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Dimensions: 12-3/8"W x 7-7/8"D x 2-3/8"H

Save 25% on a 4 Gauge Amp Kit with Purchase!

$189.99

IN STOCK

Only 3 Left!

(2) RE Audio SEXv2-12D4 12" SE-X v2 Series Dual 4 ohm Subwoofer + Hifonics HFi1500D 1500W RMS Class D Monoblock HFi Series Amplifier

• 1 ohms: 1500 watts x 1 chan.
• Rubatek Foam Surround
• Dual Composite 2-Piece Cone
• Tork-Tite Terminals
• Progressive Spiders
• Double Stacked Magnets
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

$510.22

IN STOCK

3000W Max Monoblock ARMOR Series Class D Car Amplifier

• RMS: 1200W x 1 @ 4 ohms
• Peak: 2200W x 1 @ 2 ohms, 3000W x 1 @ 1 ohm
• Strappable Peak: 6000W x 1 @ 2 ohms
• Bass Boost 0-12 dB
• Heavy Duty Aluminum Alloy Heatsink
• Dimensions: 12-1/3"W x 5"D x 2-8/10"H

Save 25% on a 4 Gauge Amp Kit with Purchase!

$89.99

IN STOCK

2600W Black Ice Series Monoblock Class D Car Amplifier

• RMS Power: 600W x 1 @ 4 ohms, 900W x 1 @ 2 ohms, 1300W x 1 @ 1 ohm
• Total Peak Power: 2600W
• Variable 12dB High, Low, & Subsonic Crossovers
• Dimensions: 8.6"W x 12"L x 2.3"H

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$119.99

IN STOCK

1200W RMS PA D Series Class-D Monoblock Car Amplifier

• 500 Watts RMS x 1 @ 4 ohms
• 800 Watts RMS x 1 @ 2 ohms
• 1200 Watts RMS x 1 @ 1 ohm
• Wired remote bass level control included
• CEA-2006 Compliant
• Signal to Noise Ration: 105 dBA
• Variable Bass Boost: 0 to +12 dB bass boost at 44 Hz
• Dimensions: 6-3/4" W x 12-15/16" L x 1-13/16" H

Save 25% on a 4 Gauge Amp Kit with Purchase!

$224.99

IN STOCK

2600W BAMF Series Class-D Monoblock Amplifier

• RMS Power: 900W x 1 @ 4 ohms, 1100W x 1 @ 2 ohms, 1400W x 1 @ 1 ohm
• Total Peak Power: 2600W
• Hybrid Aluminum Alloy Heatsink
• Dimensions: 7"W x 11"L x 2"H

Save 25% on a 4 Gauge Amp Kit with Purchase!

$129.99

IN STOCK

1200W RMS Monoblock Epicenter Series Class D Amplifier w/ The Epicenter Bass Restoration Built-In

• RMS: 400W x 1 @ 4 ohms, 750W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• THE EPICENTER® Digital Bass Restoration Built-in
•MILCâ„¢ Maximum Input Level Control
• Line-Level RCA Inputs and Active Speaker-Level Inputs)
• ACR-3 Remote Control Included
• 7.95" W x 12.00" L x 2.10" H

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!

FREE True 4 Gauge OFC Amplifier Install Kit with Purchase!

$699.99

IN STOCK

Only 1 Left!

2000W Max Pro Series Class D Monoblock Subwoofer Amplifier w/ Remote Level Control

• 2000W x 1-Chan. @ 1 Ohms Max
• 1200W x 1-Chan. @ 2 Ohms
• Variable Bass Boost Control
• Speaker-Level Inputs
• Glass/Epoxy Printed Circuit Board
• 0/180 Phase Selector

50% off Belva BBSW167 16 ga. Speaker Wire with purchase!

$114.97

IN STOCK

Only 1 Left!

2800W Max Nano Block Series Monoblock Class D Amplifier

• RMS: 450W x 1 @ 4 ohms, 700W x 1 @ 2 ohms, 1400W x 1 @ 1 ohm
• Total Peak Power: 2800W
• CEA-2006 Compliant
• Selectable Bass Boost: 0, +6, +12 dB
• Class D Circuitry
• Dimensions: 10-5/16"L x 5-1/2"W x 2-1/8"H

Get 20% off an NVX Universal Remote Level Control!

$219.95

IN STOCK

Only 1 Left!

2400W Monoblock Q Series Class D Car Amplifier

• RMS: 300W x 1 @ 4 ohms, 600W x 1 @ 2 ohms, 1200W x 1 @ 1ohms
• Total Peak Power: 2400W
• High Speed MosFET Power Supply
• 16V Capable Power Supplies
• 24dB Crossover Circuitry
• BiPolar Professional Audio Grade Output Transistors
• 13.7" L x 7.9" W x 2.4 H

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$134.95

IN STOCK

Only 2 Left!

1500W Max Anarchy Series Monoblock Power Amplifier + Two 750W RMS 12" TQ Series Single 4 ohm Subwoofers

• 4 ohms: 700 watts x 1 chan.
• 2 ohms: 1100 watts x 1 chan.
• Peak: 1500W x 1 @ 2 ohms
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 10"L x 10"W x 2-3/16"H
• Paper Cone
• Large Foam Surround

$129.89

IN STOCK

Only 1 Left!

VCW122 1000W 12" Subwoofer + BB2000Dv2 1200W RMS Monoblock Amplifier + BAK42BL Complete 4 Gauge Amplifier Wiring Kit

• 1000W 12" VC-Series Dual 2-ohm Car Subwoofer
• 1200W RMS Class D Monoblock BB Series Car Amplifier
• Complete 4 Gauge Amplifier Wiring Kit with 2-Channel RCA Cable (CCA Wiring)

$351.99

IN STOCK

Two VSW124V2 600W 12" VS-Series Subs + BB2000Dv2 1200W RMS BB Series Amplifier + BAK42BL Complete 4G Amp Wiring Kit with 2-Ch RCA Cable

• 600W 12" VS-Series Version 2 Dual 4-ohm Car Subwoofer
• 1200W RMS Class D Monoblock BB Series Car Amplifier
• Complete 4 Gauge Amplifier Wiring Kit with 2-Channel RCA Cable

$409.99

IN STOCK

2500W EVOLUTION Series Monoblock Class A/B Car Amplifier

• 1250W x 1 Chan. @ 4 Ohms
• 2500W x 1 Chan. @ 2 Ohms
• Peak Power: 2500W
• Soft Turn-On Circuit
• Nickel-Plated Terminals
• Variable Bass EQ

$99.95

IN STOCK

Only 3 Left!

1200W RMS, United Series Class D Monoblock Car Amplifier

United Series Monoblock Class D Car Amplifier • 400W RMS @ 4 ohms • 600W RMS @ 2 ohms • 1200W RMS @ 1 ohm • Wired Bass Remote Included • Variable Low Crossover • RCA Preamp Line Output • Phase Control Switch • Variable Bass Boost • Exclusive "Peak Limiter Circuitry"

Limited Offer: 15% off a Belva Wiring + Capacitor Kit!

$169.95

IN STOCK

Only 1 Left!

2400W Monoblock Momentum CSA Series Class D Amplifier

• RMS: 300W x 1 @ 4 ohms, 600W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• High Speed MOSFET Power Supply
• Studio-Grade Bipolar Output Stage Transistors for Smooth Audio Response
• Preamp RCA outputs to daisy chain multiple amps
• 8.00" W x 10.70" L x 2.00" H

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$142.95

AVAILABLE

Ships at Later Date

1200W RMS, PDX Series Monoblock Power Density Class D Digital Car Amplifier

• RMS: 1200W x 1 @ 4 ohms, 1200W x 1 @ 2 ohms
• Total RMS Power: 1200W
• CEA-2006 Compliant
• 6-Layer Glass Epoxy PC Board and Compact Size
• Thermal Protection Circuitry
• Dimensions: 7-9/16"D x 10-1/8"W x 2"H

$549.95

IN STOCK

2000W Max (1200W RMS) Class D Monoblock BB Series Version 2 Car Amplifier

• RMS: 540W x 1 @ 4 ohms, 900W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB at 30 - 80 Hz
• Subsonic Filter From Off - 50 Hz
• Dimensions: 12-1/2"W x 8-1/4"D x 2-1/4"H

$179.99

IN STOCK

Two 10CVX124 750W 12" CompVX Subs + BB2000Dv2 1200W RMS BB Series Amp + BAK42BL Complete 4 Gauge Amp Wiring Kit with 2-Ch RCA Cable

• 750W 12" CompVX Series Dual 4 ohm Subwoofer
• 1200W RMS Class D Monoblock BB Series Car Amplifier
• Complete 4 Gauge Amplifier Wiring Kit with 2-Channel RCA Cable

$742.13

IN STOCK

Only 2 Left!

2400W Max 1 Channel Monoblock D Block Series Car Amplifier

• RMS: 350W x 1 @ 4 ohms, 650W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB
• Linkable with RCA
• Dimensions: 11-3/4"L x 6-1/2"W x 2-1/8"H

Get 20% off an NVX Universal Remote Level Control!

$229.99

IN STOCK

Only 2 Left!

1200W RMS KX Series Monoblock Class D Car Power Amplifier

• RMS: 600W x 1 @ 4 ohms, 1200W x 1 @ 2 ohms
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Kick EQ+ Bass Boost: 0-18 dB from 20-80 Hz
• Magnetic Panel Covers Controls
• Dimensions: 8-5/16"W x 9-9/16"L x 2-1/8"H

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!

Limited Offer: 15% off a Belva Wiring + Capacitor Kit!

$629.95

IN STOCK

Only 1 Left!

D-Series 1500W Monoblock Class D Car Amplifier

• RMS Power: 750W x 1 @ 4 ohms, 1500W x 1 @ 2 ohms
• Total Peak Power: 3000W
• Signal to Noise Ratio: >95dB
• CEA-2006 Compliant
• >Dimensions: 13-5/8" W x 7-3/16" D x 2-3/8" H

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$429.95

IN STOCK

1500W Monoblock Z-Line Series Class SQ A/B Amplifier

• RMS: 500W x 1 @ 4 ohms, 1000W x 1 @ 2 ohms, 1500W x 1 @ 1 ohm
• Fluid-FETS hand selected insulated MOSFETS
• Q-Stasis preamp stage with wide input range
• Top mounted controls for simple setup & adjustment
• Frequency Response: 15 - 250 Hz

Add an AudioControl Bass Restoration Processor & Save $100

$239.99

IN STOCK

1200W RMS Monoblock Slash v3 Series Class D Car Amplifier

• RMS: 1200W x 1 @ 4 ohms, 1200W x 1 @ 2 ohms, 1200W x 1 @ 1.5 ohms
• Total RMS Power: 1200W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Parametric Bass Boost EQ
• Fully Variable Infrasonic Filter
• Dimensions: 19.70"L x 9.25"W x 2.36"H

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!

FREE True 4 Gauge OFC Amplifier Install Kit with Purchase!

$1,199.99

IN STOCK

Only 3 Left!

Two VSW122V2 600W 12" VS-Series Dual 2-ohm Subs with AC1500.1M 1500W Max Anarchy Series Monoblock Amp and XKIT42 2-Ch 4G Amp Installation Kit

• 600W 12" VS-Series Version 2 Dual 2-ohm Car Subwoofer
• 1500W Max Anarchy Series Monoblock Power Amplifier
• 2-Chan. True Spec 4 Gauge Amp Installation Kit w/RCA Interconnect & 40 ft Speaker Cable

$364.00

IN STOCK

1200W RMS, Monoblock Class D, HD Series Small Profile Car Amplifier with R.I.P.S. Technology

• RMS: 1200W x 1 @ 4 ohms, 1200W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total RMS Power: 1200W
• R.I.P.S. - Regulated, Intelligent Power Supply
• Single Cycle control - High Fidelity Class D
• 1 Pair of Buffered Preamps RCA Outputs
• Dimensions: 10.74"L x 7.85"W x 1.93"H

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!

FREE True 4 Gauge OFC Amplifier Install Kit with Purchase!

$999.99

IN STOCK

Only 3 Left!

Kicker 40CWS122 (CompS122) 12" Comp S-Series Single 2-Ohm Subwoofer + Hifonics HFi1500D Class D Monoblock HFi Series Amplifier (HFi 1500D)

• 4 ohms: 500 watts x 1 chan.
• Injection-Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Large-Diameter Spider
• High-Strength Spiralead Tinsel Leads
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

$310.62

IN STOCK

Only 2 Left!

DC Audio Level 4 12D2 12" Level 4 Series Dual 2 ohm Car Subwoofer + Hifonics HFi1500D 1500W RMS Class D Monoblock HFi Series Amplifier

• 1 ohms: 1500 watts x 1 chan.
• Dual 2 ohm Voice Coil
• Extremely Rigid Non-Pressed Paper Cone Assembly
• Multilayered Polymer Wide Roll Foam Surround
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

$489.62

IN STOCK

Only 2 Left!

(2) Kicker CVX124 750W 12" CompVX Series Dual 4 ohm Subwoofer + Hifonics HFi1500D 1500W RMS Class D Monoblock HFi Series Amplifier

• 1 ohms: 1500 watts x 1 chan.
• Improved SoloKon Cone
• Ribbed Santoprene Surround
• Stitched Surround
• Spiralead Tinsel Leads
• Aluminum Basket
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

$749.89

IN STOCK

Only 2 Left!

Two VSW102V2 500W 10" VS-Series V2 Dual 2-ohm Car Subs with HFi1500D 1500 Watt RMS Monoblock Amp and XKIT42 2-Ch 4G OFC Amp Installation Kit

• 500W 10" VS-Series Version 2 Dual 2-ohm Car Subwoofer
• 1500 Watt RMS Class D Monoblock Amplifier
• 2-Chan. True Spec 4 Gauge Amp Installation Kit w/RCA Interconnect & 40 ft Speaker Cable

$418.00

IN STOCK

Rockford Fosgate Punch P1S2-12 12" Punch Single 2-ohm Subwoofer + Hifonics HFi1500D Class D Monoblock HFi Series Amplifier (HFi 1500D)

• 4 ohms: 500 watts x 1 chan.
• Kevlar Reinforced Paper Cone
• High Density NBR Half-Roll Surround
• 2" 4-Layer Voice Coil
• 10 AWG Nickel Plated Compression Input Push Terminals
• Wired remote bass level control included
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Signal to Noise Ration: >95 dB

$289.89

IN STOCK

2000W Max (1200W RMS) Class D Monoblock BB Series Car Amplifier

• RMS: 540W x 1 @ 4 ohms, 900W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB at 30-80 Hz
• Subsonic Filter From 20-50 Hz
• Dimensions: 12-1/2"W x 8-1/4"D x 2-1/4"H

DISCONTINUED

3000W Max Evolution Series Class D Monoblock Amplifier with Bass Remote

• RMS: 1200W x 1 @ 4 ohms
• Peak: 2200W x 1 @ 2 ohms, 3000W x 1 @ 1 ohm
• Wired Bass Level Remote
• Bass Boost: 0-18 dB
• DataLink Cable for Connecting Two Evolution Amps
• Dimensions: 10"D x 13"W x 2-3/8"H

Limited Offer: 10% off a Belva Wiring + Capacitor Kit!

$114.99

IN STOCK

Only 1 Left!

1100W RMS Monoblock Class D X-Power Series Car Amplifier

• RMS: 650W x 1 @ 4 ohms, 1100W x 1 @ 2 ohms
• Total RMS Power: 1100W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB at 50 Hz
• Multi-Stage Power Management Circuit
• Dimensions: 9"L x 13-3/8"W x 2-1/4"H

$279.99

OUT OF STOCK

List price $409.93: Kicker TCompS104 10" CompS Series Angled Truck Loaded Subwoofer Enclosure + Planet Audio AC1500.1M Anarchy Series Monoblock Power Amplifier + Belva 4 Gauge Kit

• 4 ohms: 563 watts x 1 chan.
• Injection-Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Tough Black Carpeting
• 3/4" MDF Construction
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 10"L x 10"W x 2-3/16"H

$199.99

OUT OF STOCK

1500W RMS Constant Power Series Class BD Monoblock Amplifier

• RMS: 1000W x 1 @ 4 ohms, 1500W x 1 @ 2 ohms, 1500W x 1 @ 1 ohm
• Total RMS Power: 1500W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB at 45 Hz
• Ultra Efficient Class bD Circuitry
• Dimensions: 14-15/16"L x 8-3/16"W x 2-3/16"H

$799.99

OUT OF STOCK

Items per page: 20 50 100

Related Categories

Amplifier Wiring Kits
Get all the cables, wires, and hardware you need to install your new car audio amplifier with one of these power amp kits. Amplifier wiring kits come with your basic power and ground cables, as well as other necessary wires. Select complete amplifier kits will include speaker wire, RCA interconnect cables, and more! To make sure you get the kit that is best designed for your car audio system, scroll down to the bottom of this page for the buying guide.
Capacitors
Car audio capacitors are a great addition to any aftermarket audio system that is in need of a little extra power. Capacitors store a temporary electrical charge that can be released during periods of extra power strain. If a vehicle has dimming headlights when music is played, a capacitor could solve that problem.
Sound Processors
For those who want the most out their car audio system, a quality sound processor is a must. After some slight adjustments, your systems will sound like it has been professionally tuned and optimized. Tune your system to perfection with these crossovers, equalizers, and bass drivers. Click here to learn more about digital sound processors and to find out which type would be best for your car audio system.

Monoblock Amplifiers Information

Mono Subwoofer Amplifiers

Mono amplifiers are single channel amps, but they can be used to power more than one subwoofer. Mono amps typically produce more power than multi-channel amps, which makes them ideal for powering subwoofers. Class D mono amps are the most efficient of all amplifier designs because they draw less current and as a result generate less heat in comparison to the classic mono amplifier design.

A mono amplifier puts out only one channel of sound, as opposed to a stereo amp that puts out two channels of sound. A mono amp is generally used for extremely low frequencies, such as bass, that are channeled into a single subwoofer. It doesn't matter that both stereo channels are combined for these low bass frequencies because you couldn't tell which channel the sounds are coming from anyway because you feel the sound pressure more than hear the sound.