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Monoblock Amplifiers Minimum Impedance Bridged: Not Bridgeable, not CEA Compliant

1400W RMS Monoblock Class D ZTX Series Car Amplifier

• ZTX Series Monoblock Class D Amplifier
• 600W x 1 Chan. @ 4 ohms • 1000W x 1 Chan. @ 2 ohms • 1400W x 1 Chan. @ 1 ohm
• 3-Way System Protection
• 1 Channel Operation
• 1/0 Gauge Power and Ground Inputs
• Variable Bass Boost 0-12 dB

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$189.99

IN STOCK

2400W Max Class D Monoblock Zeus Series Amplifier

• Peak: 650W x 1 @ 4 ohms, 1200W x 1 @ 2 ohms, 2400W x 1 @ 1 ohm
• Total Peak Power: 2400W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 17-3/16"L x 10"W x 2-7/16"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$172.95

IN STOCK

1500W Max Anarchy Series Monoblock Power Amplifier

• RMS: 1100W x 1 @ 4 ohms
• 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

50% off NVX 2-Channel RCA Cables w/ purchase!

$64.99

IN STOCK

1500W Max Monoblock Armor Series Class A/B Car Amplifier

• RMS: 700W x 1 @ 4 ohms
• Peak: 1500W x 1 @ 2 ohms
• Wired Bass Remote Included
• Bass Boost 0-18 dB
• Heavy Duty Aluminum Alloy Heatsink
• Dimensions: 10-1/3"L x 5"W x 2-3/16"H

10% off 4 Gauge Amp Wiring Kit with Purchase

$59.99

IN STOCK

2500W RMS Monoblock Class D ZTX Series Car Amplifier

• ZTX Series Monoblock Class D Amplifier
• 1000W x 1 Chan. @ 4 ohms • 1700W x 1 Chan. @ 2 ohms
• 2500W x 1 Chan. @ 1 ohm
• 3-Way System Protection
• 1 Channel Operation • 4 Gauge Power and Ground Inputs
• Variable Bass Boost 0-12 dB

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$299.99

IN STOCK

1800W Max V-Drive Series Class D Single Channel Monoblock Car Audio Amplifier

• Peak: 450W x 1 @ 4 ohms, 900W x 1 @ 2 ohms, 1800W x 1 @ 1 ohm
• Total Peak Power: 1800W
• Wired Bass Level Remote
• Bass Boost: 0-10 dB
• Illuminated Badge and Heatsink
• Dimensions: 12-3/16"L x 9-1/2"W x 2-1/8"H

Save 50% on the NVX Bass Expanding Processor w/ Purchase!

$119.99

IN STOCK

1500W Max Psyclone Series Monoblock Class AB Amplifier with Wired Bass Knob

• RMS: 250W x 1 @ 4 ohms, 1500W x 1 @ 2 ohms
• Total Peak Power: 1500W
• Wired Bass Remote Included
• Bass Boost: 0-18 dB
• Speaker Level Inputs
• Dimensions: 2-7/16"W x 9-1/16"L x 11-1/4"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$54.95

IN STOCK

1200W Max Class D Monoblock Zeus Series Amplifier

• Peak: 400W x 1 @ 4 ohms, 600W x 1 @ 2 ohms, 1200W x 1 @ 1 ohm
• Total Peak Power: 1200W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 45 Hz
• Wired Bass Remote Included
• Dimensions: 12"L x 10"W x 2-7/16"H

$119.95

IN STOCK

4000W Max Phantom Series Class D Monoblock Power Amplifier

• RMS: 1600W x 1 @ 4 ohms
• Peak: 3000W x 1 @ 2 ohms, Peak Power: 4000W x 1
• Class D Circuitry
• Bass Boost 0-18 dB
• Wired Bass Control Included
• Dimensions: 9-1/2" D x 15"W x 2-1/4"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$99.99

IN STOCK

3800W MAX Class D Single Channel Monoblock Chaos Exxtreme Series Amplifier

• RMS: 1600W x 1 @ 4 ohms
• Peak: 2600W x 1 @ 2 ohms, 3800W x 1 @ 1 ohms
• Class D Circuitry
• Bass Boost 0-18 dB at 50 Hz
• Speaker Level Inputs
• Dimensions: 11"W x 14-15/16"L x 2-7/8"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$109.95

IN STOCK

3200W Max Class D Monoblock Zeus Series Amplifier

• Peak: 800W x 1 @ 4 ohms, 1600W x 1 @ 2 ohms, 3200W x 1 @ 1 ohm
• Total Peak Power: 3200W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 19-15/16"L x 10"W x 2-7/16"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$229.95

IN STOCK

1800W RMS Class D Monoblock BB Series Car Amplifier

• RMS: 780W x 1 @ 4 ohms, 1260W x 1 @ 2 ohms, 1800W x 1 @ 1 ohm
• Total Peak Power: 3000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB from 30-80 Hz
• Subsonic Filter from 20-50 Hz
• Dimensions: 13-3/4"W x 8-1/4"D x 2-1/4"H

Save 50% on the NVX Bass Expanding Processor w/ Purchase!

$149.99

OUT OF STOCK

1500W Max, Evolution Series Monoblock Power Amplifier

• 600W x 1 Chan. @ 4 Ohms
• 1500W x 1 Chan. @ 2 Ohms
• Speaker Short Protection
• Soft Turn-On Circuit
• Nickel-Plated Terminals
• Variable Bass EQ

$69.99

IN STOCK

650W RMS Single-Channel Monoblock iON Series Class D Full-Range Digital Stereo Bridgeable Amplifier

• RMS: 400 x 1 @ 4 ohms, 650W x 1 @ 2 ohms
• Total RMS Power: 650W
• Class D Circuitry
• Bass Boost: 0 - 12 dB at 45 Hz
• Wired Bass Remote Included
• Dimensions: 5-5/16"W x 9"L x 1-11/16"H

25% off a 4 Gauge Amp Kit with Purchase

$106.95

IN STOCK

4500W Max Onyx Series Class D Monoblock Power Amplifier

• RMS: 2100W x 1 @ 4 ohms
• Peak: 3500W x 1 @ 2 ohms, 4500W x 1 chan @ 1 ohm
• Class D Circuitry
• Bass Boost 0-18 dB
• Line and Speaker Level Inputs
• Dimensions: 15-1/4" L x 10" W x 2-3/16" H

50% off NVX 2-Channel RCA Cables w/ purchase!

$119.99

IN STOCK

2500W RMS, Rubicon Series Class D Monoblock Amplifier

Rubicon Series Monoblock Car Amplifier • 1000 watts x 1 chan @ 4 Ohms • 1700 watts x 1 chan @ 2 Ohms • MOSFET Power Supply • LED Protection Indicator • SMT Built In Cooling Fan • Aluminum Alloy Heatsink

25% off a Soundstream 2 Farad Capacitor with LED Display

$259.95

IN STOCK

5000W Max, Evolution Series Class D Monoblock Power Amplifier

• RMS: 1800W x 1 @ 4 ohms, 2500W x 1 @ 2 ohms
• Peak: 2200W x 1 @ 4 ohms, 3500W x 1 @ 2 ohms, 5000W x 1 @ 1 ohm
• Wired Bass Level Remote
• Bass Boost: 0-18 dB
• DataLink Cable for Connecting Two Evolution Amps
• Dimensions: 10"D x 19-1/2"W x 2-3/8"H

$159.99

IN STOCK

3000W RMS Class D Monoblock BB Series Car Amplifier

• RMS: 1200W x 1 @ 4 ohms, 1800W x 1 @ 2 ohms, 3000W x 1 @ 1 ohm
• Total Peak Power: 5000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB from 30-80 Hz
• Subsonic Filter from 20-50 Hz
• Dimensions: 20-3/8"W x 8-1/4"D x 2-1/4"H

Save 50% on the NVX Bass Expanding Processor w/ Purchase!

$249.99

IN STOCK

450W RMS Axis Series Class AB Monoblock Car Amplifier

• RMS: 450W x 1 @ 4 ohms
• Total Peak Power: 1500W
• Wired Bass Knob Included
• Switchable Bass Boost: 0 or +18 dB at 50 Hz
• High-Level Inputs
• Dimensions: 10-5/8"W x 9-7/16"D x 2-7/16"H

$61.95

IN STOCK

Only 1 Left!

625W RMS Class AB Single Channel Monoblock Chaos Exxtreme Series Amplifier

• RMS: 500W x 1 @ 4 ohms, 625W x 1 @ 2 ohms
• Total Peak Power: 1250W
• Wired Bass Remote Included
• Bass Boost 0-18 dB at 50 Hz
• Speaker Level Inputs
• Dimensions: 11"W x 10-5/8"L x 2-7/8"H

25% off a 4 Gauge Amp Kit with Purchase

$64.95

IN STOCK

5000W Max, Phantom Series Class D Monoblock Power Amplifier

• 1 ohm: 5000 watts x 1 chan.
• RMS power output: 1800 watts x 1 chan.
• Wired remote subwoofer level control
• Nickel-plated speaker and power terminals
• Subsonic Filter

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$142.99

IN STOCK

Only 1 Left!

900W Max Power Series Class AB Monoblock Amplifier with Black Gloss Finish

• RMS: 300W x 1 @ 4 ohms, 450W x 1 @ 2 ohms
• Total Peak Power: 3600W
• Wired Bass Remote Included
• Bass Boost: 0-12 dB
• High Current Bi-Polar Transistors
• Dimensions: 9"D x 15-3/4"W x 2-1/2"H

25% off a 4 Gauge Amp Kit with Purchase

$84.99

IN STOCK

5000W MAX Class D Single Channel Monoblock Chaos Exxtreme Series Amplifier

• RMS Power: 2000W x 1 @ 4 ohms
• Peak Power: 3500W x 1 @ 2 ohms, 5000W x 1 @ 1 ohms
• Class D Circuitry
• Bass Boost 0-18 dB at 50 Hz
• Speaker Level Inputs
• Dimensions: 11"W x 20-11/16"L x 2-7/8"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$129.95

IN STOCK

1000W RMS, Rubicon Series Class D Monoblock Amplifier

Rubicon Series Monoblock Car Amplifier • 600 watts x 1 chan @ 4 Ohms • 800 watts x 1 chan @ 2 Ohms • MOSFET Power Supply • LED Protection Indicator • SMT Built In Cooling Fan • Aluminum Alloy Heatsink

25% off a Soundstream 1.5 Farad Capacitor with LED Display

$149.95

IN STOCK

5500W Max Onyx Series Class D Monoblock Power Amplifier

• RMS: 2300W x 1 @ 4 ohms
• Peak: 4000W x 1 @ 2 ohms, 5500W x 1 chan @ 1 ohm
• Class D Circuitry
• Bass Boost 0-18 dB
• Line and Speaker Level Inputs
• Dimensions: 18-1/8" L x 10" W x 2-3/16" H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$154.99

IN STOCK

2500W Max Anarchy Series Monoblock Power Amplifier

• RMS: 1800W x 1 @ 4 ohms
• Peak: 2500W x 1 @ 2 ohms
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 14"L x 10"W x 2-3/16"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$93.25

IN STOCK

Only 2 Left!

3300W RMS Class D Monoblock Car Power Amplifier

• Peak: 1200W x 1 @ 4 ohms, 1500W x 1 @ 2 ohms, 2000W x 1 @ 1 ohm
• Total Peak Power: 6000W
• Wired Bass Remote Included
• Bass Boost: 0-18 dB
• Class D Circuitry
• Dimensions: 9"W x 17-1/4"D x 2-1/2"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$174.95

IN STOCK

2100W Maxx Ground Pounder Series 1-Channel Monoblock Car Amplifier

Ground Pounder Series Monoblock Amplifier • MOSFET PWM Power Supply • LED Power/Protect Indicators • Soft Start Sound • Subsonic Filter • Illuminated Crunch Badge • 4-Way Protection Circuitry • Full Range Line Output

$104.99

IN STOCK

2500W Max Big Bang Series Monoblock Digital Class D Car Amplifier

• Peak: 700W x 1 @ 4 ohms, 1100W x 1 @ 2 ohms, 2500W x 1 @ 1 ohm
• Total Peak Power: 2500W
• Class D Circuitry
• Bass Boost: 0-18 dB
• 1 Pair of Preamp Outputs
• Dimensions: 10-1/4"W x 6-8/9"L x 2-3/10"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$149.95

IN STOCK

1100W RMS Class AB Single Channel Monoblock Chaos Exxtreme Series Amplifier

• RMS: 900W x 1 @ 4 ohms, 1100W x 1 @ 2 ohms
• Total Peak Power: 2200W
• Wired Bass Remote Included
• Bass Boost 0-12 dB at 50 Hz
• Speaker Level Inputs
• Dimensions: 11"W x 16-15/16"L x 2-7/8"H

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

$79.99

IN STOCK

450W RMS Single-Channel Monoblock iON Series Class D Full-Range Digital Stereo Bridgeable Amplifier

• RMS: 260 x 1 @ 4 ohms, 450W x 1 @ 2 ohms
• Total RMS Power: 450W
• Class D Circuitry
• Bass Boost: 0 - 12 dB at 45 Hz
• Wired Bass Remote Included
• Dimensions: 5-5/16"W x 8"L x 1-11/16"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$99.99

IN STOCK

3500W Max, Onyx Series Class D Monoblock Power Amplifier with Remote Level Control

Onyx Series Monoblock Class D Car Amplifier • 1500W x 1 Chan. @ 4 ohms • 3500W Max • MOSFET PWM Power supply • Variable gain controls • Phase Shift Selector • Black Heatsink • Variable Subsonic and low-pass filter

$89.99

IN STOCK

2000W Max Digital Monoblock TNT Series Car Amplifier with High Level Inputs

• RMS: 500W x 1 @ 4 ohms, 1000W x 1 @ 2 ohms
• Total Peak Power: 2000W
• Wired Bass Remote Included
• Bass Boost: 0-10 dB
• Class D Stealth Design
• Dimensions: 11"D x 9-3/4"W x 2-1/4"H

$129.95

IN STOCK

1500W EVOLUTION Series Monoblock Class A/B Amplifier

• 750W x 2 Chan. @ 4 Ohms
• 1500W x 2 Chan. @ 2 Ohms
• Soft Turn-On Circuit
• Nickel-Plated Terminals
• Variable Bass EQ

$68.65

IN STOCK

900W RMS Class AB Single Channel Monoblock Chaos Exxtreme Series Amplifier

• RMS: 700W x 1 @ 4 ohms, 900W x 1 @ 2 ohms
• Total Peak Power: 1800W
• Wired Bass Remote Included
• Bass Boost 0-18 dB at 50 Hz
• Speaker Level Inputs
• Dimensions: 11"W x 13-3/4"L x 2-7/8"H

50% off NVX 2-Channel RCA Cables w/ purchase!

$72.95

IN STOCK

Only 1 Left!

1600W RMS, Rubicon Series Class D Monoblock Amplifier

Rubicon Series Monoblock Car Amplifier • 700 watts x 1 chan @ 4 Ohms • 1100 watts x 1 chan @ 2 Ohms • MOSFET Power Supply • LED Protection Indicator • SMT Built In Cooling Fan • Aluminum Alloy Heatsink

25% off a Soundstream 2 Farad Capacitor with LED Display

$184.95

IN STOCK

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

$129.99

IN STOCK

1000W Monoblock Ground Pounder Class A/B Amplifier

• RMS Power: 500W x 1 @ 4 ohms, 1000W x 1 @ 2 ohms
• Variable Bass Boost
• Total Peak Power: 1000W
• 9.05"W x 13.93"L x 2.29"H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$89.99

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

50% off NVX 2-Channel RCA Cables w/ purchase!

$94.99

IN STOCK

1000W Mono Block Onyx Series Class D Amplifier

• RMS: 475W x 1 @ 4 ohms, 750W x 1 @ 2 ohms, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Fluid-Fets MOSFET Power Supply
• Q-Stasis Pre-Amplifier Stage
• Heavy Duty Aluminum Alloy Heat-Sink
• Dimensions: 9.5"W x 11.26"L x 2.34"H

Save 25% on a 20 sq ft. Sound Damping Kit!

$129.99

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

$139.99

IN STOCK

2000W Monoblock ATA Series Car Amplifier

• Max Power: 500W x 1 @ 4 ohms, 1000W x 1 @ 2 ohms
• Total Peak Power: 2000W
• Adjustable 12dB Crossovers
• Dimensions: 9.45" W x 15.75" L x 2.08" H

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$99.99

IN STOCK

Only 3 Left!

4000W Max Monoblock ARMOR Series Class D Car Amplifier

• RMS: 1600W x 1 @ 4 ohms
• Peak: 3000W x 1 @ 2 ohms, 4000W x 1 @ 1 ohm
• Strappable Peak: 8000W x 1 @ 2 ohms
• Bass Boost 0-12 dB
• Heavy Duty Aluminum Alloy Heatsink
• Dimensions: 14-1/3"W x 5"D x 2-8/10"H

25% off a 4 Gauge Amp Kit with Purchase

$109.95

IN STOCK

4000W Max, Evolution Series Class D Monoblock Power Amplifier

• RMS: 1600W x 1 @ 4 ohms
• Peak: 3000W x 1 @ 2 ohms, 4000W x 1 @ 1 ohm
• Wired Bass Level Remote
• Bass Boost: 0-18 dB
• DataLink Cable for Connecting Two Evolution Amps
• Dimensions: 10"D x 15"W x 2-3/8"H

$124.99

IN STOCK

1800W Max, Onyx Series Monoblock MOSFET Amplifier

• RMS: 900W x 1 @ 4 ohms
• Peak: 1800W x 1 @ 2 ohms
• Wired Bass Remote Included
• Bass Boost 0-18 dB
• Heavy Duty Aluminum Alloy Heatsink
• Dimensions: 11-3/4" L x 10" W x 2-3/16" H

25% off a 4 Gauge Amp Kit with Purchase

$76.99

IN STOCK

Only 3 Left!

5500W Max, Class D Monoblock Amplifier

FX1 Series 1-Channel Class D Car Amplifier • 1700W x 1 chan. @ 4 ohms • 2500W x 1 chan. @ 2 ohms • 3200W x 1 chan. @ 1 ohm • 5500W x 1 chan. Max • Nickel Plated Heavy Duty Power & Speaker Terminals

25% off 0/1 Gauge Amp Kit with Select Amplifiers!

$199.99

IN STOCK

1200W XED Series Monoblock Class D Amplifier

• Tight Connection Mount RCA Connectors
• Total Peak Power: 1200W
• Variable Low-Pass Filter
• High Quality Topology Design
• Ambient Backlit Logo

25% off a 4 Gauge Amp Kit with Purchase

$129.99

IN STOCK

1500W Monoblock Ground Pounder Series Class A/B Amplifier

• RMS Power: 750W x 1 @ 4 ohms, 1500W x 1 @ 2 ohms
• Total Peak Power: 1500W
• Variable Bass Boost
• Speaker Level Inputs
• 9.05"W x 14.72"L x 2.29"H

50% off a 0/1 Gauge Amp Kit with Select Amplifiers!

$98.00

IN STOCK

4000W Max Big Bang Series Monoblock Digital Class D Car Amplifier

• Peak: 1500W x 1 @ 4 ohms, 2000W x 1 @ 2 ohms, 4000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Class D Circuitry
• Bass Boost: 0-18 dB
• 1 Pair of Preamp Outputs
• Dimensions: 15-3/4"W x 6-8/9"L x 2-3/10"H

Save 50% on the NVX Bass Expanding Processor w/ Purchase!

$249.00

IN STOCK

1000W Class D 1-Channel Monoblock Reference Series Amplifier

• Peak: 475W x 1 @ 4 ohms, 750W x 1 @ 2 ohms, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

$139.99

IN 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.

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.