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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.
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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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Alpine MRX-M110 OPEN BOX COMPLETE

1100W RMS Monoblock Class D X-Power Series Car Amplifier

MRX-M110 big DISCONTINUED
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Alpine MRX-M110 OPEN BOX COMPLETE

1100W RMS Monoblock Class D X-Power Series Car Amplifier

Opened and Never Installed
• RMS: 650W x 1 @ 4 ohm, 1100W x 1 @ 2 ohm
• Total RMS Power: 1100W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB at 50 Hz
• Multi-Stage Power Management Circuit
• Dimensions: 9"L x 13-3/8"W x 2-1/4"H

6

Opened and Never Installed
• RMS: 650W x 1 @ 4 ohm, 1100W x 1 @ 2 ohm
• Total RMS Power: 1100W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB at 50 Hz
• Multi-Stage Power Management Circuit
• Dimensions: 9"L x 13-3/8"W x 2-1/4"H

RE Audio DTS-1500.1 (DTS15001) R/B

2000W, Monoblock Class D DTS Series Car Amplifier

DTS-1500.1 big DISCONTINUED
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RE Audio DTS-1500.1 (DTS15001) R/B

2000W, Monoblock Class D DTS Series Car Amplifier

DTS Series Monoblock Class D Car Amplifier • 2000W Dynamic • Wired Remote Bass Level Control • Preamp RCA Outputs • Variable Low-Pass Filter • Subsonic Filter • Variable Bass Boost

DTS Series Monoblock Class D Car Amplifier • 2000W Dynamic • Wired Remote Bass Level Control • Preamp RCA Outputs • Variable Low-Pass Filter • Subsonic Filter • Variable Bass Boost

NVX - Worth the Envy - Direct to Consumer Car Audio

Diamond Audio D5-1200.1 Open Box

(Open Box) 1200 watts, Class D Monoblock Amplifier D51200.1

D5-1200.1 big DISCONTINUED
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Diamond Audio D5-1200.1 Open Box

(Open Box) 1200 watts, Class D Monoblock Amplifier D51200.1

Monoblock Car Amplifier • 1200W RMS x 1 @ 2 • Adjustable Crossovers • Massive Proprietary Heatsink • Adjustable Mounting Feet • Fully Regulated Power Supply

Monoblock Car Amplifier • 1200W RMS x 1 @ 2 • Adjustable Crossovers • Massive Proprietary Heatsink • Adjustable Mounting Feet • Fully Regulated Power Supply

Autotek AXL4050.4 (Factory Refurbished)

4000W 4-Channel AXL Series Class AB Car Amplifier

AXL4050.4 big DISCONTINUED
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Autotek AXL4050.4 (Factory Refurbished)

4000W 4-Channel AXL Series Class AB Car Amplifier

• 500W x 4-Chan. @ 4 ohm
• 1000W x 4-Chan. @ 2 ohm
• 2000W x 2 Chan. @ 4 ohm
• 3-Way System Protection
• 4/3/2 Channel Operation
• 1/0 Gauge Power and Ground Inputs
• Illuminated Logo for Stylish and Unique Design

• 500W x 4-Chan. @ 4 ohm
• 1000W x 4-Chan. @ 2 ohm
• 2000W x 2 Chan. @ 4 ohm
• 3-Way System Protection
• 4/3/2 Channel Operation
• 1/0 Gauge Power and Ground Inputs
• Illuminated Logo for Stylish and Unique Design

Pioneer GM-D8601 (Factory Refurbished)

800W RMS Class D Monoblock GM Digital Series Amplifier

GM-D8601 big DISCONTINUED
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Pioneer GM-D8601 (Factory Refurbished)

800W RMS Class D Monoblock GM Digital Series Amplifier

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm, 800W x 1 @ 1 ohm
• Total Peak Power: 1500W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Dimensions: 10-7/16"W x 2-3/8"D x 7-7/8"H

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm, 800W x 1 @ 1 ohm
• Total Peak Power: 1500W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Dimensions: 10-7/16"W x 2-3/8"D x 7-7/8"H

Kicker 02KX600.1 KX-Series 02KX600.1 OB

NO ENDCAPS OR ACCESSORIES

No picture DISCONTINUED
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Kicker 02KX600.1 KX-Series 02KX600.1 OB

NO ENDCAPS OR ACCESSORIES

300W RMS x 1 at 4 ohm • 600W RMS x 1 at 2 ohm • Requires 4 Gauge Wiring • 2 ohm mono stable • Remote Bass Level Control

300W RMS x 1 at 4 ohm • 600W RMS x 1 at 2 ohm • Requires 4 Gauge Wiring • 2 ohm mono stable • Remote Bass Level Control

Phoenix Gold R15.0:1 R/B

(Factory Refurbished) Octane-R 15.0:1 MonoBlock Class D Amplifier

R15.0:1 big DISCONTINUED
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Phoenix Gold R15.0:1 R/B

(Factory Refurbished) Octane-R 15.0:1 MonoBlock Class D Amplifier

1500 watts max, 1000 watts RMS (at 2 ohm) monoblock sub amplifier • neon blue illumination • silver connections • Aux output • Twin "T" Bass EQ circuitry •

1500 watts max, 1000 watts RMS (at 2 ohm) monoblock sub amplifier • neon blue illumination • silver connections • Aux output • Twin "T" Bass EQ circuitry •

Orion HCCA-D5000 R/B

Factory Refurbished with 90 Days Warranty, 5000W HCCA High Current Monoblock Amplifier

HCCA-D5000 big DISCONTINUED
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Orion HCCA-D5000 R/B

Factory Refurbished with 90 Days Warranty, 5000W HCCA High Current Monoblock Amplifier

5000W HCCA High Current Competition Class D Monoblock Amplifier • 1000W x 1 chan. @ 4 Ohm • 1600W x 1 chan. @ 2 Ohm • 1 Ohm: 2500 watts x 1 chan. • MOSFET power supply • CEA-2006 compliant

5000W HCCA High Current Competition Class D Monoblock Amplifier • 1000W x 1 chan. @ 4 Ohm • 1600W x 1 chan. @ 2 Ohm • 1 Ohm: 2500 watts x 1 chan. • MOSFET power supply • CEA-2006 compliant

Open Box Phoenix Gold RSd 1200.1 (RSd1200.1)

1200W RMS, Radial Sd Series Class D Monoblock Amplifier

RSd1200.1 big DISCONTINUED
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Open Box Phoenix Gold RSd 1200.1 (RSd1200.1)

1200W RMS, Radial Sd Series Class D Monoblock Amplifier

1200W RSd Class D Monoblock Amplifier • 780W x 1 chan. @ 4 Ohm • 1200W x 1 chan. @ 2 Ohm • MOSFET power supply • protection circuitry • line level inputs • variable bass boost • S/N ratio: 79dB

1200W RSd Class D Monoblock Amplifier • 780W x 1 chan. @ 4 Ohm • 1200W x 1 chan. @ 2 Ohm • MOSFET power supply • protection circuitry • line level inputs • variable bass boost • S/N ratio: 79dB

Kicker IX500.1 (10IX500.1) Open Box

(Open Box) 500W RMS, Monoblock Class D IX Series Amplifier (IX5001)

10IX500.1 big DISCONTINUED
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Kicker IX500.1 (10IX500.1) Open Box

(Open Box) 500W RMS, Monoblock Class D IX Series Amplifier (IX5001)

IX Series Monoblock Class D Car Amplifier • 500W x 1-Chan. @ 2 Ohm • 275W x 1-Chan. @ 4 Ohm • Super-Small Footprint • Optional Stacking Mounts Available • Optional Vinyl Skins For Personalization

IX Series Monoblock Class D Car Amplifier • 500W x 1-Chan. @ 2 Ohm • 275W x 1-Chan. @ 4 Ohm • Super-Small Footprint • Optional Stacking Mounts Available • Optional Vinyl Skins For Personalization

Alpine MRX-V60 Open Box

600W RMS, 5-Channel Class D X-Power Series Car Amplifier

MRX-V60 big DISCONTINUED
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Alpine MRX-V60 Open Box

600W RMS, 5-Channel Class D X-Power Series Car Amplifier

MRX Series 5-Channel Car Amplifier • 50W RMS @ 4 Ohm x 4 Chan. + 200 Watts x 1 Chan. • 75W RMS @ 2 Ohm x 4 Chan. + 300 watts x 1 chan. • 150W RMS @ 4 Ohm Bridged x 2 Channels • Variable Low-Pass Crossover • Variable High-Pass Crossover • Variable Bass Boost

MRX Series 5-Channel Car Amplifier • 50W RMS @ 4 Ohm x 4 Chan. + 200 Watts x 1 Chan. • 75W RMS @ 2 Ohm x 4 Chan. + 300 watts x 1 chan. • 150W RMS @ 4 Ohm Bridged x 2 Channels • Variable Low-Pass Crossover • Variable High-Pass Crossover • Variable Bass Boost

Precision Power PPI D3000/1 Open Box

(Open Box) 3000W Max, Class D Monoblock Amplifier

D3000/1 big DISCONTINUED
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Precision Power PPI D3000/1 Open Box

(Open Box) 3000W Max, Class D Monoblock Amplifier

3000W Class D MonoBlock Amplifier • 495W x 1 chan. @ 4 Ohm • 1000W x 1 chan. @ 2 Ohm • QBASS • PWM power supply • gold plated RCA connectors • CEA-2006 compliant

3000W Class D MonoBlock Amplifier • 495W x 1 chan. @ 4 Ohm • 1000W x 1 chan. @ 2 Ohm • QBASS • PWM power supply • gold plated RCA connectors • CEA-2006 compliant

RE Audio XTX-3000.1 (XTX3000.1) R/B

3000W XTX Series Monoblock Full Digital Class D Car Amplifier

XTX-3000.1 big DISCONTINUED
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RE Audio XTX-3000.1 (XTX3000.1) R/B

3000W XTX Series Monoblock Full Digital Class D Car Amplifier

XTX Series Monoblock Full Range Digital Car Amplifier • 3000W Dynamic • 2-Way System Protection • Brushed Aluminum Alloy Convection Cooled Heatsink • Variable Low-Pass Filter • Variable Bass Boost

XTX Series Monoblock Full Range Digital Car Amplifier • 3000W Dynamic • 2-Way System Protection • Brushed Aluminum Alloy Convection Cooled Heatsink • Variable Low-Pass Filter • Variable Bass Boost

Rockford Fosgate T500-1bd OB

(MINOR BLEMISHES AND NO BASS KNOB) 2007 Power Series Compact Class bD Monoblock Amplifier

T500-1bd big DISCONTINUED
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Rockford Fosgate T500-1bd OB

(MINOR BLEMISHES AND NO BASS KNOB) 2007 Power Series Compact Class bD Monoblock Amplifier

Power Series 1-Channel Class BD Car Amplifier • 250W x 1 chan. @ 4 ohm • 400W x 1 chan. @ 2 ohm • 500W x 1 chan. @ 1 ohm • 500W x 1 chan. Max • MOSFET Power Supply • RCA pass-thru • Audiophile grade speaker connections

Power Series 1-Channel Class BD Car Amplifier • 250W x 1 chan. @ 4 ohm • 400W x 1 chan. @ 2 ohm • 500W x 1 chan. @ 1 ohm • 500W x 1 chan. Max • MOSFET Power Supply • RCA pass-thru • Audiophile grade speaker connections

Infinity Reference 1300a R/B

(Factory Refurbished) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

1300a big DISCONTINUED
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Infinity Reference 1300a R/B

(Factory Refurbished) 342W Max, Reference Series Class D Monoblock Amplifier (REF1300A)

Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

3

Reference Series Class D Monoblock Amplifier • 200W x 1 chan. @ 4 ohm • 300W x 1 chan. @ 2 ohm • 342W x 1 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs • Wired remote bass level control included

Audiobahn A1504DP R/B

True Digital Series 4-Channel Amplifier (Factory Refurbished)

A1504DP big DISCONTINUED
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Audiobahn A1504DP R/B

True Digital Series 4-Channel Amplifier (Factory Refurbished)

1 ohm stereo stable, 2 ohm bridged • True Digital Circuitry • Dual Cooling Fans • HP/LP Crossovers • Bass Boost • Cobalt Blue Illumination • 150/300/450 watts x 4 ch. (@ 4/2/1 ohm)

1

1 ohm stereo stable, 2 ohm bridged • True Digital Circuitry • Dual Cooling Fans • HP/LP Crossovers • Bass Boost • Cobalt Blue Illumination • 150/300/450 watts x 4 ch. (@ 4/2/1 ohm)

MTX RFL1200D R/B

Refurbished 2400W Max RFL Series Class D Monoblock Amplifier

RFL1200D big DISCONTINUED
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MTX RFL1200D R/B

Refurbished 2400W Max RFL Series Class D Monoblock Amplifier

RFL Series Monoblock Class D Car Amplifier • 400W x 1 Chan @ 4 Ohm • 800W x 1 Chan @ 2 Ohm • 2400W Max • Electronic Bass Control • Gun Metal Gray Chassis • Black End Caps • Stackable Design • Smart Engage Technology

RFL Series Monoblock Class D Car Amplifier • 400W x 1 Chan @ 4 Ohm • 800W x 1 Chan @ 2 Ohm • 2400W Max • Electronic Bass Control • Gun Metal Gray Chassis • Black End Caps • Stackable Design • Smart Engage Technology

Alpine MRP-M350 R/B

FACTORY REFURBISHED (DISPLAY UNIT)

MRP-M350 big DISCONTINUED
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Alpine MRP-M350 R/B

FACTORY REFURBISHED (DISPLAY UNIT)

MonoBlock Subwoofer Amplifier • 350 watts RMS x 1 @ 2 ohm • MOSFET power supply

MonoBlock Subwoofer Amplifier • 350 watts RMS x 1 @ 2 ohm • MOSFET power supply

Kicker IX500.4 (10IX500.4) Open Box

(Open Box) 500W RMS, 4-Channel Class D IX Series Amplifier (IX5004)

10IX500.4 big DISCONTINUED
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Kicker IX500.4 (10IX500.4) Open Box

(Open Box) 500W RMS, 4-Channel Class D IX Series Amplifier (IX5004)

IX Series Class D Car Amplifier • 4-Channel Operation • 75W x 4 Chan. @ 4 ohm • 125W x 4 Chan. @ 2 ohm • 250W x 2 Chan. Bridged • 0-18 Bass Boost • Gold-Plated Terminals • Small Footprint • Low and High Pass Filters

IX Series Class D Car Amplifier • 4-Channel Operation • 75W x 4 Chan. @ 4 ohm • 125W x 4 Chan. @ 2 ohm • 250W x 2 Chan. Bridged • 0-18 Bass Boost • Gold-Plated Terminals • Small Footprint • Low and High Pass Filters

Planet Audio AC3000.1D-OPEN BOX

3000W Max Anarchy Series Class D Monoblock Power Amplifier

AC3000.1D big DISCONTINUED
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Planet Audio AC3000.1D-OPEN BOX

3000W Max Anarchy Series Class D Monoblock Power Amplifier

• RMS: 1000W x 1 @ 4 ohm, 1500W x 1 @ 2 ohm, 2100W x 1 @ 1 ohm
• Total Peak Power: 3000W
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 13"L x 10"W x 2-3/16"H

• RMS: 1000W x 1 @ 4 ohm, 1500W x 1 @ 2 ohm, 2100W x 1 @ 1 ohm
• Total Peak Power: 3000W
• Illuminated Logo
• Bass Boost 0-18 dB
• Chrome-Plated Connections
• Dimensions: 13"L x 10"W x 2-3/16"H

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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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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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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