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2005 Mazda 3

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

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

Amps for Adding Speakers for 2005 Mazda 3

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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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.
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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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Rockford Fosgate M2-300X4

300W RMS M2 Series 4-Channel Marine Amplifier

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Rockford Fosgate M2-300X4

300W RMS M2 Series 4-Channel Marine Amplifier

• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

Hertz HCP 4M

760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

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Hertz HCP 4M

760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

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List price $470.00
-9% $429.99

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• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

NVX - Worth the Envy - Direct to Consumer Car Audio
Limited time!

JL Audio MV400/4i

400W RMS Class D MVi Series 4 Channel Marine Amplifier

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JL Audio MV400/4i

400W RMS Class D MVi Series 4 Channel Marine Amplifier

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Infinity Reference 7005A (AMPRF7005AAM)

760W RMS Class AB/D Reference Series 5 Channel Car Amplifier

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Infinity Reference 7005A (AMPRF7005AAM)

760W RMS Class AB/D Reference Series 5 Channel Car Amplifier

• 50 watts x 4 channel + 320 watts x 1 channel @ 4 ohm
• 65 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 140 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 760 watts
• Class AB / D 2 ohm Stable 5-Channel Amplifier

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Boss Elite BE830.5D

830W RMS Class D Elite Series 5-Channel Car Amplifier with Bass Remote

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Boss Elite BE830.5D

830W RMS Class D Elite Series 5-Channel Car Amplifier with Bass Remote

• 60 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 95 watts x 4 channel + 450 watts x 1 channel @ 2 ohm
• Bridged: 190 watts x 2 channel @ 4 ohm + 450 watts x 1 channel @ 2 ohm
• Total RMS Power: 830 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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List price $395.99
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DS18 NVY-IPX7.4

1440W Peak (700W RMS) Class D 4-Channel IP67 Waterproof Marine and Powersports Amplifier with Input Selector

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DS18 NVY-IPX7.4

1440W Peak (700W RMS) Class D 4-Channel IP67 Waterproof Marine and Powersports Amplifier with Input Selector

• 120 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 350 watts x 2 channel @ 4 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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$700.00

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• 120 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 350 watts x 2 channel @ 4 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Jensen JAFIVE

1175W Peak (1055W RMS) Class D JA Series 5-Channel Car Amplifier

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Jensen JAFIVE

1175W Peak (1055W RMS) Class D JA Series 5-Channel Car Amplifier

• 85 watts x 4 channel + 310 watts x 1 channel RMS @ 4 ohm
• 135 watts x 2 channel + 495 watts x 1 channel RMS @ 2 ohm
• Total RMS Power: 1055 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 85 watts x 4 channel + 310 watts x 1 channel RMS @ 4 ohm
• 135 watts x 2 channel + 495 watts x 1 channel RMS @ 2 ohm
• Total RMS Power: 1055 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Limited time!

JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

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JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

• 150 watts x 4 channel (rated power from 1.5 to 4 ohm)
• Bridged: 300 watts x 2 channel (rated power from 4 to 8 ohm)
• Total RMS Power: 600 watts
• Class D 1.5 ohm Stable 4-Channel Amplifier

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Kenwood eXcelon XM802-5

1600W Peak (800W RMS) Class D eXcelon Motorsports Series 5-Channel Marine and Powersports Amplifier (Hi-Res Audio Certified)

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Kenwood eXcelon XM802-5

1600W Peak (800W RMS) Class D eXcelon Motorsports Series 5-Channel Marine and Powersports Amplifier (Hi-Res Audio Certified)

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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List price $650.00
-31% $449.00

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Used from: $314.30

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Limited time!

MTX Thunder TH800.4

800W RMS Class D Thunder Series 4 Channel Car Amplifier

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MTX Thunder TH800.4

800W RMS Class D Thunder Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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List price $649.95
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NVX XKIT44

NVX XKIT44

$119.99

$83.99

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• 100 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Limited time!

MTX MA800.4

800W RMS Class D MA Series 4-Channel Marine Amplifier

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MTX MA800.4

800W RMS Class D MA Series 4-Channel Marine Amplifier

• 100 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $779.95
-10% $699.95

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• 100 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

Fusion SG-DA51600

1600W Peak (850W RMS) Signature Series Class-D 5-Channel Marine Amplifier with Bass Remote

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Fusion SG-DA51600

1600W Peak (850W RMS) Signature Series Class-D 5-Channel Marine Amplifier with Bass Remote

• 80 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 130 watts x 4 channel + 330 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm + 330 watts x 1 channel @ 2 ohm
• Total RMS Power: 850 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 80 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 130 watts x 4 channel + 330 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm + 330 watts x 1 channel @ 2 ohm
• Total RMS Power: 850 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

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Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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2
List price $600.00
-42% $349.99

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• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

Limited time!

Boss Elite MPD380.4

380W RMS Class D Elite Series 4 Channel Marine Amplifier

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Boss Elite MPD380.4

380W RMS Class D Elite Series 4 Channel Marine Amplifier

• 70 watts x 4 channel @ 4 ohm
• 95 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 380 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $437.98
-17% $364.99

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• 70 watts x 4 channel @ 4 ohm
• 95 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 380 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

Rockford Fosgate Punch Marine PM400X4

400W RMS Class AB Punch Series 4 Channel Marine Amplifier

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Rockford Fosgate Punch Marine PM400X4

400W RMS Class AB Punch Series 4 Channel Marine Amplifier

• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

FREE NVX Amp Kit at Checkout!
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$519.99

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• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

Sundown Audio SAM-100.4

400W RMS Class D SAM Series 4-Channel Marine and Amplifier with Bluetooth

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Sundown Audio SAM-100.4

400W RMS Class D SAM Series 4-Channel Marine and Amplifier with Bluetooth

• 700 watts x 4 channel @ 4 ohm
• 400 watts x 4 channel @ 2 ohm
• Bridged: 700 watts x 4 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $419.99
-17% $349.99

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• 700 watts x 4 channel @ 4 ohm
• 400 watts x 4 channel @ 2 ohm
• Bridged: 700 watts x 4 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

AudioControl ACM-2.300

300W RMS Class D ACM Series 2-Channel Compact Car Amplifier

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AudioControl ACM-2.300

300W RMS Class D ACM Series 2-Channel Compact Car Amplifier

• 75 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

2+ offers available
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$359.00

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Save 30% off an NVX XKIT82 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT82 Amp Kit! No code needed — discount applies automatically at checkout.
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Hertz HMP 4D

600W Peak (260W RMS) Class D 4 HMP Series 4-Channel Full Range Motorcycle and Powersports Amplifier

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Hertz HMP 4D

600W Peak (260W RMS) Class D 4 HMP Series 4-Channel Full Range Motorcycle and Powersports Amplifier

• 4 Channel: 50 watts x 4 channel @ 4 ohm
• 4 Channel: 65 watts x 4 channel @ 2 ohm
• 3 Channel: 50 watts x 2 channel @ 4 ohm + 130 watts x 1 channel @ 4 ohm
• 3 Channel: 65 watts x 2 channel @ 2 ohm + 130 watts x 1 channel @ 4 ohm
• 2 Channel: 130 watts x 2 channel @ 4-ohm
• Total RMS Power: 260 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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List price $415.00
-8% $379.99

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• 4 Channel: 50 watts x 4 channel @ 4 ohm
• 4 Channel: 65 watts x 4 channel @ 2 ohm
• 3 Channel: 50 watts x 2 channel @ 4 ohm + 130 watts x 1 channel @ 4 ohm
• 3 Channel: 65 watts x 2 channel @ 2 ohm + 130 watts x 1 channel @ 4 ohm
• 2 Channel: 130 watts x 2 channel @ 4-ohm
• Total RMS Power: 260 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Limited time!

NVX NDA6004 (Open Box, Great)

1200W Peak (600W RMS) N-Series Class-D 4-Channel Amplifier

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NVX NDA6004 (Open Box, Great)

1200W Peak (600W RMS) N-Series Class-D 4-Channel Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Purchase $400 or More of NVX and Save 15%!
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DS18 G4000.5D

4000W Peak (1480W RMS) Class D Gen-X Series 5 Channel Car Amplifier with Bass Remote

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DS18 G4000.5D

4000W Peak (1480W RMS) Class D Gen-X Series 5 Channel Car Amplifier with Bass Remote

• 130 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 220 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 420 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1480 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Save 30% off an NVX XKIT46 Amp Kit at Checkout!
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$395.95

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    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 2005 Mazda 3?

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