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  1. Home
  2. Discontinued Car Audio & Electronics
  3. Discontinued Car Amplifiers
  4. Discontinued Class-D Amplifiers

Discontinued Class-D Amplifiers

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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.
XDM Series (25)
SALT Series (24)
V Series (24)
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Brutus Series (21)
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Apocalypse Sport Series (1)
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WET Series (1)
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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MTX TD1000.1D Open Box

1000W RMS Monoblock TD Series Class D Car Amplifier

TD1000.1D big DISCONTINUED
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MTX TD1000.1D Open Box

1000W RMS Monoblock TD Series Class D Car Amplifier

Monoblock TD Series Class D Car Amplifier • 4 ohm: 350 watts x 1 • 2 ohm: 600 watts x 1 chan. • 1 ohm: 1000 watts x 1 chan. • Frequency response: 10-220 Hz

Monoblock TD Series Class D Car Amplifier • 4 ohm: 350 watts x 1 • 2 ohm: 600 watts x 1 chan. • 1 ohm: 1000 watts x 1 chan. • Frequency response: 10-220 Hz

Kenwood KAC-8104D R/B

(Factory Refurbished) 1000W Max, Class D Monoblock Amplifier

KAC-8104D big DISCONTINUED
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Kenwood KAC-8104D R/B

(Factory Refurbished) 1000W Max, Class D Monoblock Amplifier

Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Speaker-level inputs • Preamp RCA outputs

Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Speaker-level inputs • Preamp RCA outputs

NVX - Worth the Envy - Direct to Consumer Car Audio

Soundstream DTR1.900D R/B

900W RMS, Class D Monoblock D-Tower Series Amplifier

DTR1.900D big DISCONTINUED
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Soundstream DTR1.900D R/B

900W RMS, Class D Monoblock D-Tower Series Amplifier

Tower Series Monoblock Class D Car Amplifier • 600W x 1 chan. @ 2 ohm • 900W RMS • Vertical stereo amplifier • MOSFET power supply • Aluminum alloy heat sink • LED power and protection indicators

Tower Series Monoblock Class D Car Amplifier • 600W x 1 chan. @ 2 ohm • 900W RMS • Vertical stereo amplifier • MOSFET power supply • Aluminum alloy heat sink • LED power and protection indicators

Hifonics BRX2400.1D-OPEN BOX

2400W RMS Class NextGen Super-D Monoblock Brutus Series Amplifier

BRX2400.1D big DISCONTINUED
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Hifonics BRX2400.1D-OPEN BOX

2400W RMS Class NextGen Super-D Monoblock Brutus Series Amplifier

• RMS: 850W x 1 @ 4 ohm, 1600W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total RMS Power: 2400W
• CEA-2006 Compliant
• Bass Boost: 0-10 dB at 40 Hz
• Aluminum Alloy Heatsink with Illuminated Hifonics Logo
• Dimensions: 18-11/16"L x 10-5/16"W x 2-1/2"H

• RMS: 850W x 1 @ 4 ohm, 1600W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total RMS Power: 2400W
• CEA-2006 Compliant
• Bass Boost: 0-10 dB at 40 Hz
• Aluminum Alloy Heatsink with Illuminated Hifonics Logo
• Dimensions: 18-11/16"L x 10-5/16"W x 2-1/2"H

Hifonics Zeus ZXi60.4 + 1K (Factory Refurbished)

5-Channel Zeus Series Car Amplifier (ZXi 60.4+1K, ZXi60.4+1K)

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Hifonics Zeus ZXi60.4 + 1K (Factory Refurbished)

5-Channel Zeus Series Car Amplifier (ZXi 60.4+1K, ZXi60.4+1K)

5-Channel Class A/B-D Car Amplifier • 60W x 4 chan. @ 4 ohm • 120W x 4 chan. @ 2 ohm • MOSFET Power Supply • Variable Bass Boost • 4-Way System Protection • Aluminum Alloy Finned Heatsink

5-Channel Class A/B-D Car Amplifier • 60W x 4 chan. @ 4 ohm • 120W x 4 chan. @ 2 ohm • MOSFET Power Supply • Variable Bass Boost • 4-Way System Protection • Aluminum Alloy Finned Heatsink

Crunch PZ3000.4 (Factory Refurbished)

3000W PowerZone Series 4-Channel Car Audio Amplifier

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Crunch PZ3000.4 (Factory Refurbished)

3000W PowerZone Series 4-Channel Car Audio Amplifier

• 3000 Watts Max
• 750 Watts x 4-Chan. @ 2 Ohm
• Selectable Highpass/Lowpass Filters
• Speaker-level (high-level) inputs
• Signal to Noise Ration: >90 dB

• 3000 Watts Max
• 750 Watts x 4-Chan. @ 2 Ohm
• Selectable Highpass/Lowpass Filters
• Speaker-level (high-level) inputs
• Signal to Noise Ration: >90 dB

Open Box Power Acoustik PS1-4000D

Open Box 4000W Max, Power Series Class D Monoblock Amplifier

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Open Box Power Acoustik PS1-4000D

Open Box 4000W Max, Power Series Class D Monoblock Amplifier

Power Series Class D Monoblock Car Amplifier • 1200W x 1 chan. @ 4 ohm • 1700W x 1 chan. @ 2 ohm • 2200W x 1 chan. @ 1 ohm • Full regulated PWM MOSFET power supply • Preamp RCA outputs • 4-Way Protection circuitry

Power Series Class D Monoblock Car Amplifier • 1200W x 1 chan. @ 4 ohm • 1700W x 1 chan. @ 2 ohm • 2200W x 1 chan. @ 1 ohm • Full regulated PWM MOSFET power supply • Preamp RCA outputs • 4-Way Protection circuitry

Hifonics HFi2000D (Factory Refurbished)

2000W RMS, Class D Monoblock HFi Series Amplifier (HFi 2000D)

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Hifonics HFi2000D (Factory Refurbished)

2000W RMS, Class D Monoblock HFi Series Amplifier (HFi 2000D)

HFi Series Monoblock Class D Car Amplifier • 1300W x 1-Chan. @ 2 Ohm • 2000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

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HFi Series Monoblock Class D Car Amplifier • 1300W x 1-Chan. @ 2 Ohm • 2000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

Pioneer GM-D7500M Open Box

(Open Box) 800W Max, GM Digital Series Class D Monoblock Amplifier

GM-D7500M big DISCONTINUED
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Pioneer GM-D7500M Open Box

(Open Box) 800W Max, GM Digital Series Class D Monoblock Amplifier

GM Series Class D Monoblock Car Amplifier • 200W x 1 chan. @ 4 ohm • 400W x 1 chan. @ 2 ohm • 800W x 1 chan. Max • Digital Signal Technology • Low-Pass Filter • Speaker Level Inputs • Bass Level Control

GM Series Class D Monoblock Car Amplifier • 200W x 1 chan. @ 4 ohm • 400W x 1 chan. @ 2 ohm • 800W x 1 chan. Max • Digital Signal Technology • Low-Pass Filter • Speaker Level Inputs • Bass Level Control

Hifonics ZRX1000.1D (Factory Refurbished)

1000W Max Class D Monoblock Zeus Series Amplifier

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Hifonics ZRX1000.1D (Factory Refurbished)

1000W Max Class D Monoblock Zeus Series Amplifier

• 4 ohm: 475 watts x 1 chan.
• 2 ohm: 750 watts x 1 chan.
• 1 ohm: 1000 watts x 1 chan.
• Pulse Width Modulated (PWM) MOSFET Power Supply

Promo Savings Icon

• 4 ohm: 475 watts x 1 chan.
• 2 ohm: 750 watts x 1 chan.
• 1 ohm: 1000 watts x 1 chan.
• Pulse Width Modulated (PWM) MOSFET Power Supply

JBL GTO1201.1II R/B

1200 watts, Grand Touring Series Class D Monoblock Amplifier GTO1201.1 II

GTO1201.1II big DISCONTINUED
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JBL GTO1201.1II R/B

1200 watts, Grand Touring Series Class D Monoblock Amplifier GTO1201.1 II

1200W Grand Touring Series Monoblock Amplifier • 787W x 1 chan. @ 4 Ohm • 1114W x 1 chan. @ 2 Ohm • Class D topology • plexiglass viewing window • high and low-level inputs • CEA-2006 compliant

1200W Grand Touring Series Monoblock Amplifier • 787W x 1 chan. @ 4 Ohm • 1114W x 1 chan. @ 2 Ohm • Class D topology • plexiglass viewing window • high and low-level inputs • CEA-2006 compliant

RE Audio XT-800.2V3 Factory Refurbished

(Factory Refurbished) 1000W, 2-Channel Class "DE" Digital Stereo Amplifier

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RE Audio XT-800.2V3 Factory Refurbished

(Factory Refurbished) 1000W, 2-Channel Class "DE" Digital Stereo Amplifier

XT V3 Series 2-Channel Digital Car Amplifier • Class DE • 250W x 2 Chan. @ 2 Ohm • 125W x 2 Chan @ 4 Ohm • 500W Bridged • Elevated Efficiency Platform • High-Pass Filter • Low-Pass Filter • Aluminum Heatsink

XT V3 Series 2-Channel Digital Car Amplifier • Class DE • 250W x 2 Chan. @ 2 Ohm • 125W x 2 Chan @ 4 Ohm • 500W Bridged • Elevated Efficiency Platform • High-Pass Filter • Low-Pass Filter • Aluminum Heatsink

Kenwood KAC-6104D R/B

(Factory Refurbished) 600W Max, Class D Monoblock Amplifier

KAC-6104D big DISCONTINUED
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Kenwood KAC-6104D R/B

(Factory Refurbished) 600W Max, Class D Monoblock Amplifier

Class D Monoblock Car Amplifier • 200 Watts RMS x1 @ 4 Ohm • 300 Watts RMS x1 @ 2 Ohm• 400 Watts Max • MOSFET Switching Power Supply • Speaker-Level Inputs • Aluminum Heat Sink • CEA-2006 Complaint Amplifier •

Class D Monoblock Car Amplifier • 200 Watts RMS x1 @ 4 Ohm • 300 Watts RMS x1 @ 2 Ohm• 400 Watts Max • MOSFET Switching Power Supply • Speaker-Level Inputs • Aluminum Heat Sink • CEA-2006 Complaint Amplifier •

Hifonics TX4405 R/B

220W RMS Titan Series 4-Channel Amplifier

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Hifonics TX4405 R/B

220W RMS Titan Series 4-Channel Amplifier

4-Channel Class-A/B Amplifier • 110W RMS x 4 @ 2 • 220W RMS x 2 @ 4 • Accu-Cross • Line Output • 18dB Bass Boost • Variable Input Sensitivity

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4-Channel Class-A/B Amplifier • 110W RMS x 4 @ 2 • 220W RMS x 2 @ 4 • Accu-Cross • Line Output • 18dB Bass Boost • Variable Input Sensitivity

MTX JWULP07FB10A-TN Open Box (Complete)

Fits Select 2007-2016 Jeep Wrangler Vehicles - Amplified 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

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MTX JWULP07FB10A-TN Open Box (Complete)

Fits Select 2007-2016 Jeep Wrangler Vehicles - Amplified 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

• 200W Single 10" Sealed Subwoofer Enclosure with Built in Amplifier
• RMS: 200 W Total
• 10" Sealed Vehicle Specific Enclosure
• Preloaded with single 10" Terminator-Series Subwoofer
• Sealed enclosure with factory finish - Black

• 200W Single 10" Sealed Subwoofer Enclosure with Built in Amplifier
• RMS: 200 W Total
• 10" Sealed Vehicle Specific Enclosure
• Preloaded with single 10" Terminator-Series Subwoofer
• Sealed enclosure with factory finish - Black

MTX TTDDC07FB10A-FPR Open Box (Complete)

For Select Toyota Tundra Vehicles - Amplified 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

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MTX TTDDC07FB10A-FPR Open Box (Complete)

For Select Toyota Tundra Vehicles - Amplified 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

• 200W Single 10" Sealed Subwoofer Enclosure with Built-In Amplifier
• RMS: 200 W Total
• Preloaded with single 10" FPR-Series Subwoofers
• 10" Sealed Vehicle Specific Enclosure
• Hand Laid Fiberglass Construction - Black

• 200W Single 10" Sealed Subwoofer Enclosure with Built-In Amplifier
• RMS: 200 W Total
• Preloaded with single 10" FPR-Series Subwoofers
• 10" Sealed Vehicle Specific Enclosure
• Hand Laid Fiberglass Construction - Black

Kicker ZX1000.1 Factory R/B

06ZX1000.1 ZX Series Class D Monoblock Amplifier

ZX1000.1 big DISCONTINUED
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Kicker ZX1000.1 Factory R/B

06ZX1000.1 ZX Series Class D Monoblock Amplifier

Factory Reconditioned with 90 Days Manufacturer's warranty, 1000W RMS Class D Mono Subwoofer Amplifier • 1000 watts RMS power @ 2 ohm • remote level control • protection circuitry • speaker and preamp level inputs

Factory Reconditioned with 90 Days Manufacturer's warranty, 1000W RMS Class D Mono Subwoofer Amplifier • 1000 watts RMS power @ 2 ohm • remote level control • protection circuitry • speaker and preamp level inputs

American Bass PH4000MD OPEN BOX COMPLETE

4000W Class D Amplifier Phantom Series Car Amplifier

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American Bass PH4000MD OPEN BOX COMPLETE

4000W Class D Amplifier Phantom Series Car Amplifier

• Micro Technology Amplifier
• 1 Ohm Stable Class D Mono Block Amplifier
• RMS at 1 Ohm: 2000 Watts
• MAX at 1 Ohm: 4000 Watts
• Frequency Response: 10Hz ~ 220Hz
• Variable Subsonic
• Variable Low Pass Filter: 40Hz ~ 220Hz

• Micro Technology Amplifier
• 1 Ohm Stable Class D Mono Block Amplifier
• RMS at 1 Ohm: 2000 Watts
• MAX at 1 Ohm: 4000 Watts
• Frequency Response: 10Hz ~ 220Hz
• Variable Subsonic
• Variable Low Pass Filter: 40Hz ~ 220Hz

Power Acoustik BAMF-5500/1D (BAMF55001/D)-OPEN BOX

5500W Max Class D Monoblock BAMF Series Amplifier

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Power Acoustik BAMF-5500/1D (BAMF55001/D)-OPEN BOX

5500W Max Class D Monoblock BAMF Series Amplifier

• RMS: 1700W x 1 @ 4 ohm, 2300W x 1 @ 2 ohm, 3200W x 1 chan @ 1 ohm
• Total Peak Power: 5500W
• Class D Circuitry
• Bass Boost: 0-18 dB
• 1 Pair of Preamp Outputs
• Dimensions: 16-7/8"L x 8-1/4"W x 2-1/8"H

• RMS: 1700W x 1 @ 4 ohm, 2300W x 1 @ 2 ohm, 3200W x 1 chan @ 1 ohm
• Total Peak Power: 5500W
• Class D Circuitry
• Bass Boost: 0-18 dB
• 1 Pair of Preamp Outputs
• Dimensions: 16-7/8"L x 8-1/4"W x 2-1/8"H

SPL FX1-3000D R/B Factory Refurbished

3000W Max, Class D Monoblock Amplifier

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SPL FX1-3000D R/B Factory Refurbished

3000W Max, Class D Monoblock Amplifier

FX1 Series 1-Channel Class D Car Amplifier • 900W x 1 chan. @ 4 ohm • 1300W x 1 chan. @ 2 ohm • 170000W x 1 chan. @ 1 ohm • 3000W x 1 chan. Max • Nickel Plated Heavy Duty Power & Speaker Terminals

FX1 Series 1-Channel Class D Car Amplifier • 900W x 1 chan. @ 4 ohm • 1300W x 1 chan. @ 2 ohm • 170000W x 1 chan. @ 1 ohm • 3000W x 1 chan. Max • Nickel Plated Heavy Duty Power & Speaker Terminals

NVX - Worth the Envy - Direct to Consumer Car Audio
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    FAQ Frequently asked questions in Discontinued Class-D Amplifiers

    Class D Amplifiers Frequently Asked Questions (FAQ)
    Class D amplifiers are a type of switching amplifier known for their high efficiency and compact size. Unlike traditional Class A, B, and AB amplifiers that use continuous analog voltage to amplify audio signals, Class D amplifiers employ a digital switching technique. This process rapidly switches the output transistors on and off, effectively turning them into binary switches that deliver the audio signal to the speaker. The switching nature of Class D amplifiers drastically reduces power wastage, resulting in higher efficiency and less heat production. As a result, Class D amplifiers are ideal for applications with limited space or power constraints, making them popular in car audio, home theater systems, and portable devices.
    Yes, modern Class D amplifiers have made significant advancements in audio fidelity and can deliver high-quality sound performance. While traditional audiophiles may have associated Class D with lower audio quality due to early models' limitations, today's Class D amplifiers have overcome many of these challenges. With advancements in switching technology, filtering, and feedback mechanisms, Class D amplifiers can now offer exceptional audio reproduction that rivals traditional Class AB amplifiers. Additionally, Class D amplifiers' efficiency and lower heat generation make them well-suited for high-power audio applications where traditional amplifiers would be impractical.
    Yes, Class D amplifiers are versatile and can power various speaker types, including subwoofers, woofers, mid-range, and tweeters. When selecting a Class D amplifier for your speakers, consider the power output (wattage) and impedance rating. Ensure that the amplifier's power rating matches or slightly exceeds your speakers' power handling capabilities to prevent underpowering or overpowering, which can lead to distortion or speaker damage. Additionally, check the amplifier's impedance range to ensure compatibility with your speakers' impedance. Most Class D amplifiers can handle both 4-ohm and 2-ohm loads, making them suitable for a wide range of speaker configurations.
    No, Class D amplifiers are known for their high efficiency, which results in significantly less heat generation compared to other amplifier classes like Class A or Class AB. The digital switching technique used in Class D amplifiers reduces power loss, resulting in a more efficient conversion of electrical energy into audio output. As a result, Class D amplifiers remain relatively cool even at high volume levels, making them suitable for space-constrained installations and applications where heat dissipation is a concern. Their cool operation also extends the lifespan of internal components and reduces the need for large heat sinks or fans.
    Yes, many Class D amplifiers support bridge mode, allowing you to increase the power output when driving a single speaker or subwoofer. In bridge mode, the amplifier combines the power output from two channels into a single channel, effectively doubling the power delivered to the speaker. However, it's essential to follow the manufacturer's guidelines and ensure that your amplifier supports bridging. Additionally, pay attention to the speaker's impedance requirements, as bridging may change the amplifier's impedance capabilities. If you're unsure or need assistance with bridging your Class D amplifier, contact Sonic Electronix's knowledgeable staff, who can help you find the right amplifier and configuration for your audio setup. With their compact size, high efficiency, and versatility, Class D amplifiers offer a compelling solution for various audio applications, delivering powerful and clear sound performance with minimal heat output.
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    Shop your 1999 Durango
    Why Use a Vehicle Fit Guide?
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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