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2020 Mazda CX-9

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Single, 1-channel monoblock sub amplifiers for when you add a sub

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Amplifiers for Powering a Sub for 2020 Mazda CX-9

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

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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.
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.
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.
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.
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.

Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
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DC Audio 10.0k with NVX 1/0 Gauge Amp Kit

10,000W Competition Series 1-Ohm Stable Class-D Monoblock Amplifier

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DC Audio 10.0k with NVX 1/0 Gauge Amp Kit

10,000W Competition Series 1-Ohm Stable Class-D Monoblock Amplifier

• RMS Power: 3000W x 1 @ 4 ohm, 5500W x 1 @ 2 ohm, 10,000W x 1 @ 1 ohm
• Strappable for Up to 20,000W of Power
• Variable Low Pass Filter
• Dimensions: 11.5" W x 37" L x 2.6" H
• Includes Amplifier Wiring Kit

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• RMS Power: 3000W x 1 @ 4 ohm, 5500W x 1 @ 2 ohm, 10,000W x 1 @ 1 ohm
• Strappable for Up to 20,000W of Power
• Variable Low Pass Filter
• Dimensions: 11.5" W x 37" L x 2.6" H
• Includes Amplifier Wiring Kit

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DS18 EXL-P2000X1D + Premium NVX XKIT02 1/0 Gauge Amp Wiring Kit

2000W RMS EXL Power Series Class D Monoblock Amplifier with Bass Remote

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DS18 EXL-P2000X1D + Premium NVX XKIT02 1/0 Gauge Amp Wiring Kit

2000W RMS EXL Power Series Class D Monoblock Amplifier with Bass Remote

• 800 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2000 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• Class D 1 Ohm Stable Monoblock Amplifier

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• 800 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2000 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• Class D 1 Ohm Stable Monoblock Amplifier

Diamond Audio HX800.1D with 4 Gauge Amplifier Wiring Kit

800W RMS Hex Series Class-D Monoblock Amplifier + NVX XKIT42 4-Channel Amp Wiring Kit

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Diamond Audio HX800.1D with 4 Gauge Amplifier Wiring Kit

800W RMS Hex Series Class-D Monoblock Amplifier + NVX XKIT42 4-Channel Amp Wiring Kit

• 340 watts x 1 channel @ 4 ohm
• 560 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 340 watts x 1 channel @ 4 ohm
• 560 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1600 watts
• Class D 1 ohm Stable Monoblock Amplifier

DS18 NXL-X1000.1D (Hydro) with NVX 4 Gauge Amp Kit

2000W Peak Class D HYDRO Series Monoblock Marine and Powersports Subwoofer Amplifier

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DS18 NXL-X1000.1D (Hydro) with NVX 4 Gauge Amp Kit

2000W Peak Class D HYDRO Series Monoblock Marine and Powersports Subwoofer Amplifier

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• IPX6 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• IPX6 waterproof rating
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Earthquake Sound PHS5000.1 with NVX 1/0 Gauge Amp Kit

5500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

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Earthquake Sound PHS5000.1 with NVX 1/0 Gauge Amp Kit

5500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

• 1600 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 1600 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Kenwood KAC-9106D with NVX 4 Gauge Amp Kit

2000W RMS Performance Series Class-D Monoblock Amplifier

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Kenwood KAC-9106D with NVX 4 Gauge Amp Kit

2000W RMS Performance Series Class-D Monoblock Amplifier

• 500 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
• Includes Amplifier Wiring Kit

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• 500 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
• Includes Amplifier Wiring Kit

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DS18 SMD-2000.1D with NVX 1/0 Gauge Amp Kit

2000W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote

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DS18 SMD-2000.1D with NVX 1/0 Gauge Amp Kit

2000W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote

• 800 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2000 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 800 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2000 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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DS18 EXL-P4000X1D + Premium NVX XKIT02 1/0 Gauge Amp Kit

4000W RMS EXL Power Series Class D Monoblock Amplifier with Bass Remote

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DS18 EXL-P4000X1D + Premium NVX XKIT02 1/0 Gauge Amp Kit

4000W RMS EXL Power Series Class D Monoblock Amplifier with Bass Remote

• 1600 watts x 1 channel @ 4 ohm
• 2600 watts x 1 channel @ 2 ohm
• 4000 watts x 1 channel @ 1 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 1600 watts x 1 channel @ 4 ohm
• 2600 watts x 1 channel @ 2 ohm
• 4000 watts x 1 channel @ 1 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable Monoblock Amplifier

DS18 G1800.1D + Belva BAK02 1/0 Gauge Amp Wiring Kit

1800W Peak (600W RMS) GEN-X Series Class D Monoblock Amplifier

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DS18 G1800.1D + Belva BAK02 1/0 Gauge Amp Wiring Kit

1800W Peak (600W RMS) GEN-X Series Class D Monoblock Amplifier

• 250 watts x 1 channel @ 4 ohm
• 450 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 250 watts x 1 channel @ 4 ohm
• 450 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable Monoblock Amplifier

Audio Control ACX-300.1 + NVX XKIT82 8 Gauge Amp Wiring Kit

ACX Series All-Weather 300W Monoblock Audio Marine Amplifier

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Audio Control ACX-300.1 + NVX XKIT82 8 Gauge Amp Wiring Kit

ACX Series All-Weather 300W Monoblock Audio Marine Amplifier

• 175 Watts RMS x 1 @ 4 ohm
• 300 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 600 Watts
• CEA-2006 Compliant
• AccuBASS®

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• 175 Watts RMS x 1 @ 4 ohm
• 300 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 600 Watts
• CEA-2006 Compliant
• AccuBASS®

Cerwin-Vega XED3001D with NVX 4 Gauge Amp Kit

400W Peak (300W RMS) XED Series Class-D Mono Channel Amplifier

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Cerwin-Vega XED3001D with NVX 4 Gauge Amp Kit

400W Peak (300W RMS) XED Series Class-D Mono Channel Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D Stable Monoblock Amplifier
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

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• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D Stable Monoblock Amplifier
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

4500W Peak (1500W RMS) Class D 1-Channel Monoblock Amplifier

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DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

4500W Peak (1500W RMS) Class D 1-Channel Monoblock Amplifier

• 550 watts x 1 channel @ 4 ohm
• 950 watts x 1 channel @ 2 ohm
• 1,500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1,500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 550 watts x 1 channel @ 4 ohm
• 950 watts x 1 channel @ 2 ohm
• 1,500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1,500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega CVP3000.1D with Belva 4 Gauge Amp Kit

600W RMS CVP Performance Series Class-AB Monoblock Car Amplifier

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Cerwin Vega CVP3000.1D with Belva 4 Gauge Amp Kit

600W RMS CVP Performance Series Class-AB Monoblock Car Amplifier

• 370 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Class A/B Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 370 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Class A/B Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

American Bass XFL DC 2000 with Belva 4 Gauge Amp Kit

2000W Peak (1000W RMS) XFL Series Class-D Monoblock Amplifier

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American Bass XFL DC 2000 with Belva 4 Gauge Amp Kit

2000W Peak (1000W RMS) XFL Series Class-D Monoblock Amplifier

• 400 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 400 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio DMD250.1D with Belva 4 Gauge Amp Kit

250W RMS DMD Series Class-D Monoblock Amplifier

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Diamond Audio DMD250.1D with Belva 4 Gauge Amp Kit

250W RMS DMD Series Class-D Monoblock Amplifier

• 160 watts x 4 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Total RMS Power: 250 watts
• Dampening Factor: > 250
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 160 watts x 4 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Total RMS Power: 250 watts
• Dampening Factor: > 250
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

MB Quart RA1-300.1 with Belva 4 Gauge Amp Kit

325W RMS Reference Series Class-D Monoblock Amplifier with Bass Remote

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MB Quart RA1-300.1 with Belva 4 Gauge Amp Kit

325W RMS Reference Series Class-D Monoblock Amplifier with Bass Remote

• 175 watts x 1 channel @ 4 ohm
• 325 watts x 1 channel @ 2 ohm
• Total RMS Power: 325 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 175 watts x 1 channel @ 4 ohm
• 325 watts x 1 channel @ 2 ohm
• Total RMS Power: 325 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

MB Quart RA1-750.1 with Belva 4 Gauge Amp Kit

750W RMS Monoblock Reference Series Full Range Class D Subwoofer Amplifier

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MB Quart RA1-750.1 with Belva 4 Gauge Amp Kit

750W RMS Monoblock Reference Series Full Range Class D Subwoofer Amplifier

• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 750 watts x 1 channel @ 1 ohm
• Total RMS Power: 750 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 750 watts x 1 channel @ 1 ohm
• Total RMS Power: 750 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin-Vega SPRO2100.1D with NVX 1/0 Gauge Amp Kit

2100W RMS Stroker PRO series Class-D Monoblock Amplifier with Bass Remote

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Cerwin-Vega SPRO2100.1D with NVX 1/0 Gauge Amp Kit

2100W RMS Stroker PRO series Class-D Monoblock Amplifier with Bass Remote

• 900 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2100 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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-22% $794.98
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• 900 watts x 1 channel @ 4 ohm
• 1400 watts x 1 channel @ 2 ohm
• 2100 watts x 1 channel @ 1 ohm
• Total RMS Power: 2100 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega B51 with NVX 4 Gauge Amp Kit

1000W Peak (500W RMS) Stealth Bomber Series Class-D Monoblock Amplifier with Bass Remote

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Cerwin Vega B51 with NVX 4 Gauge Amp Kit

1000W Peak (500W RMS) Stealth Bomber Series Class-D Monoblock Amplifier with Bass Remote

• 175 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• 500 watts x 1 channel @ 1 ohm
• Total RMS Power: 500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 175 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• 500 watts x 1 channel @ 1 ohm
• Total RMS Power: 500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega SRPM750.1DW with NVX 8 Gauge Amp Kit

750W RMS Class-D Monoblock 2-Ohm Stable Marine Amplifier w/ Bass Knob Included - White

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Cerwin Vega SRPM750.1DW with NVX 8 Gauge Amp Kit

750W RMS Class-D Monoblock 2-Ohm Stable Marine Amplifier w/ Bass Knob Included - White

• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• 750W x 1 @ 1 Ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

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• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• 750W x 1 @ 1 Ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

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    FAQ for Monoblock Sub Amplifiers in 2020 CX-9

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 2020 Mazda CX-9?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your CX-9.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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