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2009 GMC Sierra Denali

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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 2009 GMC Sierra Denali

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.
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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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AudioControl ACX-300.4

300W RMS Class D ACX Series 4-Channel Marine and Powersports Amplifier

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AudioControl ACX-300.4

300W RMS Class D ACX Series 4-Channel Marine and Powersports 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

Fusion SG-DA82000

2000W Peak (1120W RMS) Signature Series Class-D 8-Channel Marine Amplifier

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Fusion SG-DA82000

2000W Peak (1120W RMS) Signature Series Class-D 8-Channel Marine Amplifier

• 100 watts x 8 channel @ 4 ohm
• 140 watts x 8 channel @ 2 ohm
• Bridged: 280 watts x 4 channel @ 4 ohm
• Total RMS Power: 1120 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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• 100 watts x 8 channel @ 4 ohm
• 140 watts x 8 channel @ 2 ohm
• Bridged: 280 watts x 4 channel @ 4 ohm
• Total RMS Power: 1120 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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DS18 SMD-2800.5

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

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DS18 SMD-2800.5

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

• 180 watts x 4 channel + 700 watts x 1 channel @ 4 ohm
• 250 watts x 4 channel + 1100 watts x 1 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm + 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 2800 watts
• Class AB / D 1 ohm Stable 5-Channel Amplifier

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DS18 G1800.4D

1800W Peak (920W RMS) Class D GEN-X Series 4 Channel Full Range Car Amplifier

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DS18 G1800.4D

1800W Peak (920W RMS) Class D GEN-X Series 4 Channel Full Range Car Amplifier

• 150 watts x 4 channel @ 4 ohm
• 230 watts x 4 channel @ 2 ohm
• Bridged: 430 watts x 2 channel @ 4 ohm
• Total RMS Power: 920 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $287.95
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NVX XKIT44

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JL Audio JD700/5

700W RMS Class D JD Series 5-Channel Car Amplifier

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JL Audio JD700/5

700W RMS Class D JD Series 5-Channel Car Amplifier

• 75 watts x 4 channel + 180 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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Deaf Bonce Avatar ABR-200.2

200W RMS Class AB Buran Series 2 Channel Car Amplifier

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Deaf Bonce Avatar ABR-200.2

200W RMS Class AB Buran Series 2 Channel Car Amplifier

• 80 watts x 2 channel @ 4 ohm
• 100 watts x 2 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

• 65 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 190 watts x 4 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Wet Sounds Sinister-SDX6

1755W RMS Class D Sinister Series 6 Channel Marine Amplifier

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Wet Sounds Sinister-SDX6

1755W RMS Class D Sinister Series 6 Channel Marine Amplifier

• 185 watts x 6 channel @ 4 ohm
• 290 watts x 6 channel @ 2 ohm
• Bridged: 585 watts x 3 channel @ 4 ohm
• Total RMS Power: 1755 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

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List price $1899.99
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• 185 watts x 6 channel @ 4 ohm
• 290 watts x 6 channel @ 2 ohm
• Bridged: 585 watts x 3 channel @ 4 ohm
• Total RMS Power: 1755 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

Cerwin-Vega S91100.5D

1100W RMS Class D Stroker Series 5-Channel Car Amplifier with Bass Remote

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Cerwin-Vega S91100.5D

1100W RMS Class D Stroker Series 5-Channel Car Amplifier with Bass Remote

• 90 watts x 4 channel + 150 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class 2 ohm Stable 5-Channel Amplifier

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Hertz HCP 2X

800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

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Hertz HCP 2X

800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

• 100 watts x 2 channel @ 4 ohm
• 160 watts x 2 channel @ 2 ohm
• Bridged: 320 watts x 1 channel @ 1 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 2-Channel-Channel Amplifier

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List price $325.00
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Rockford Fosgate M2-200X2

200W RMS Class D M2 Series 2 Channel Marine Amplifier

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Rockford Fosgate M2-200X2

200W RMS Class D M2 Series 2 Channel Marine Amplifier

• 50 watts x 2 channel @ 4 ohm
• 100 watts x 2 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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• 50 watts x 2 channel @ 4 ohm
• 100 watts x 2 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Kenwood KAC-M8005

800W RMS Class D M Series 5-Channel Marine Amplifier

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Kenwood KAC-M8005

800W RMS Class D M Series 5-Channel Marine Amplifier

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

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List price $520.00
$499.00

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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
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

JL Audio MV800/8i

800W RMS Class D MVi Series 8 Channel Marine Amplifier

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JL Audio MV800/8i

800W RMS Class D MVi Series 8 Channel Marine Amplifier

• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel Amplifier

Wet Sounds HTM-8

1200W RMS Class D HTM Series 8 Channel Marine Amplifier with LED Backlit Badge

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Wet Sounds HTM-8

1200W RMS Class D HTM Series 8 Channel Marine Amplifier with LED Backlit Badge

• 85 watts x 8 channel @ 4 ohm
• 150 watts x 8 channel @ 2 ohm
• Bridged: 300 watts x 4 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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• 85 watts x 8 channel @ 4 ohm
• 150 watts x 8 channel @ 2 ohm
• Bridged: 300 watts x 4 channel @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

Limited time!

MTX PS800.4

800W RMS Class D PS Series 4-Channel Powersports Amplifier

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MTX PS800.4

800W RMS Class D PS Series 4-Channel Powersports 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 $549.95
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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

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American Bass DB 675.2FR

500W Peak (260W RMS) Class AB DB Series 2 Channel Car Amplifier

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American Bass DB 675.2FR

500W Peak (260W RMS) Class AB DB Series 2 Channel Car Amplifier

• 75 watts x 2 channel @ 4 ohm
• 130 watts x 2 channel @ 2 ohm
• Bridged: 220 watts x 1 channel @ 4 ohm
• Total RMS Power: 260 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

Save 30% off an NVX XKIT82 Amp Kit at Checkout!
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NVX XKIT82

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American Bass VFL Stealth 500.4 (VFLSTEALTH-500.4)

250W RMS Class AB VFL Stealth Series 4-Channel Car Amplifier

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American Bass VFL Stealth 500.4 (VFLSTEALTH-500.4)

250W RMS Class AB VFL Stealth Series 4-Channel Car Amplifier

• Total RMS Power: 250 watts
• Class A/B Stable 4-Channel Amplifier

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NVX XKIT44

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DS18 H-KO340

2200W RMS Class D Hooligan Series 4-Channel Car Amplifier with Bass Remote

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DS18 H-KO340

2200W RMS Class D Hooligan Series 4-Channel Car Amplifier with Bass Remote

• 300 watts x 4 channel @ 4 ohm
• 550 watts x 4 channel @ 2 ohm
• Bridged: 1000 watts x 2 channel @ 4 ohm
• Total RMS Power: 2200 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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DS18 X2

1140W Peak (460W RMS) Class D X Series 2-Channel Compact Car Amplifier

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DS18 X2

1140W Peak (460W RMS) Class D X Series 2-Channel Compact Car Amplifier

• 140 watts x 2 channel @ 4 ohm
• 230 watts x 2 channel @ 2 ohm
• Bridged: 380 watts x 1 channel @ 4 ohm
• Total RMS Power: 460 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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DS18 FX6

4500W Peak (1500W RMS) Class D FX Series 6-Channel Car Amplifier with LED

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DS18 FX6

4500W Peak (1500W RMS) Class D FX Series 6-Channel Car Amplifier with LED

• 180 watts x 6 channel @ 4 ohm
• 250 watts x 6 channel @ 2 ohm
• Bridged: 500 watts x 3 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 6-Channel-Channel Amplifier

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 2009 Sierra Denali

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 2009 GMC Sierra Denali?

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