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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.
Brutus Series (70)
Zeus Series (56)
X Series (39)
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CX Series (27)
N Series (26)
XDM Series (26)
SALT Series (24)
SFB Series (22)
HD Series (21)
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Kappa Series (19)
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Reference Series (17)
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XD-v2 Series (16)
ONYX Series (15)
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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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Condition

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You are currently viewing discontinued products.

DS18 S-1500.4D/RD

1500W RMS 4-Channel S Series RED Full Range Class D Amplifier

S-1500.4D/RD big DISCONTINUED
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DS18 S-1500.4D/RD

1500W RMS 4-Channel S Series RED Full Range Class D Amplifier

• 90 watts x 4 channel @ 4 ohm
• 130 watts x 4 channel @ 2 ohm
• Bridged: 235 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

• 90 watts x 4 channel @ 4 ohm
• 130 watts x 4 channel @ 2 ohm
• Bridged: 235 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Planet Audio PX4000D (Factory Refurbished)

4000W Max Axis Series Class D Monoblock Car Amplifier

PX4000D big DISCONTINUED
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Planet Audio PX4000D (Factory Refurbished)

4000W Max Axis Series Class D Monoblock Car Amplifier

• RMS: 1100W x 1 @ 4 ohm, 1800W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Wired Bass Knob Included
• Switchable Bass Boost: 0 or +18 dB at 50 Hz
• Class D Circuitry
• Dimensions: 10-11/16"W x 14-3/4"D x 2-3/8"H

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• RMS: 1100W x 1 @ 4 ohm, 1800W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Wired Bass Knob Included
• Switchable Bass Boost: 0 or +18 dB at 50 Hz
• Class D Circuitry
• Dimensions: 10-11/16"W x 14-3/4"D x 2-3/8"H

MB Quart XA1-1500.1D_XKIT42

1500W Monoblock X-Line Series Class D Amplifier + FREE 100% Copper, 2-Chan. True Spec 4 Gauge Amp Installation Kit

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MB Quart XA1-1500.1D_XKIT42

1500W Monoblock X-Line Series Class D Amplifier + FREE 100% Copper, 2-Chan. True Spec 4 Gauge Amp Installation Kit

• RMS: 325W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1500W x 1 @ 1 ohm
• Fluid-FETS hand selected insulated MOSFETS
• Q-Stasis preamp stage with wide input range
• Elaborate preamplifier with extended control
• Frequency Response: 10 - 300 Hz
• 4 Gauge 2-Channel X-Series Complete Amplifier Installation Kit

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• RMS: 325W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1500W x 1 @ 1 ohm
• Fluid-FETS hand selected insulated MOSFETS
• Q-Stasis preamp stage with wide input range
• Elaborate preamplifier with extended control
• Frequency Response: 10 - 300 Hz
• 4 Gauge 2-Channel X-Series Complete Amplifier Installation Kit

EXCLUSIVE

Hifonics Brutus BRX2416.1D 2400 Watt Brutus Amplifier + 0 Gauge Amp Kit

Complete 0 Gauge Amp Installation Wire Kit Included!!!

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Hifonics Brutus BRX2416.1D 2400 Watt Brutus Amplifier + 0 Gauge Amp Kit

Complete 0 Gauge Amp Installation Wire Kit Included!!!

• RMS Power: 850W x 1 @ 4 ohm, 1600W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 2400W
• Variable Low Pass Filter
• Dimensions: 9.8" W x 14.9" L x 2.4" H

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• RMS Power: 850W x 1 @ 4 ohm, 1600W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 2400W
• Variable Low Pass Filter
• Dimensions: 9.8" W x 14.9" L x 2.4" H

Kicker KX600.1

KX-Series 04KX600.1

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Kicker KX600.1

KX-Series 04KX600.1

600 watts RMS at 2 ohm • variable low-pass crossover • Class D design • subsonic filter • Amp-Strapping circuit • preamp outputs • remote bass level control

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600 watts RMS at 2 ohm • variable low-pass crossover • Class D design • subsonic filter • Amp-Strapping circuit • preamp outputs • remote bass level control

Kicker DX500.1

500W RMS Monoblock Class D DX Series Amplifier

11DX500.1 big DISCONTINUED
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Kicker DX500.1

500W RMS Monoblock Class D DX Series Amplifier

• RMS: 275W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Bass Boost 0-12 dB
• Balanced Differential Inputs for Noise Elimination
• Dimensions: 10-1/4"L x 8-5/16"W x 2-1/4"H

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• RMS: 275W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Bass Boost 0-12 dB
• Balanced Differential Inputs for Noise Elimination
• Dimensions: 10-1/4"L x 8-5/16"W x 2-1/4"H

EXCLUSIVE

Hifonics TXi 1508D R/B + Amplifier Kit

1500W RMS Class D Monoblock Titan TXi Series Amplifier with Included 0 AWG Amplifier Kit (TXi1508D)

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Hifonics TXi 1508D R/B + Amplifier Kit

1500W RMS Class D Monoblock Titan TXi Series Amplifier with Included 0 AWG Amplifier Kit (TXi1508D)

Titan Series 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 900W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • PWM MOSFET power supply • Wired remote bass level control included • Included 0 AWG Amplifier Kit

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Titan Series 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 900W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • PWM MOSFET power supply • Wired remote bass level control included • Included 0 AWG Amplifier Kit

Crunch P1-5050.5 (Factory Refurbished)

1000W Max 5-Channel Power One Series Class AB Car Amplifier

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Crunch P1-5050.5 (Factory Refurbished)

1000W Max 5-Channel Power One Series Class AB Car Amplifier

• 4 ohm: 125 watts x 4 chan. + 300 watts x 1 chan. (Sub)
• 2 ohm: 200 watts x 4 chan. + 500 watts x 1 chan. (Sub)
• Variable Bass Boost: 0 - 12 dB
• SEPP Class A/B Analog
• Wired Bass Remote Included

• 4 ohm: 125 watts x 4 chan. + 300 watts x 1 chan. (Sub)
• 2 ohm: 200 watts x 4 chan. + 500 watts x 1 chan. (Sub)
• Variable Bass Boost: 0 - 12 dB
• SEPP Class A/B Analog
• Wired Bass Remote Included

Boss GT2500D

2500W Max, RiOT GT Series Class D Monoblock Amplifier (GT-2500D)

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Boss GT2500D

2500W Max, RiOT GT Series Class D Monoblock Amplifier (GT-2500D)

Class D Monoblock Power Amplifier • 900 watts @ 4 Ohm RMS / 2500 watts Max Power • Variable Gain Control • Signal-to-Noise Ratio: <100dB • Remote Subwoofer Level Control

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Class D Monoblock Power Amplifier • 900 watts @ 4 Ohm RMS / 2500 watts Max Power • Variable Gain Control • Signal-to-Noise Ratio: <100dB • Remote Subwoofer Level Control

MTX Audio Thunder Marine TM601D

Class D Monoblock Amplifier for Marine Use

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MTX Audio Thunder Marine TM601D

Class D Monoblock Amplifier for Marine Use

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 1000W
• 3-Way Protection Circuitry
• Selectable Bass Boost (0-6-12 dB)
• Class D Circuitry
• Dimensions: 6-5/16"W x 8-15/16"L x 2-1/4"H

1

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 1000W
• 3-Way Protection Circuitry
• Selectable Bass Boost (0-6-12 dB)
• Class D Circuitry
• Dimensions: 6-5/16"W x 8-15/16"L x 2-1/4"H

NVX MVPA4 (Like New)

Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

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NVX MVPA4 (Like New)

Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

Power Acoustik RZ5-2100D

2100 Watt 5-Channel Amplifier

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Power Acoustik RZ5-2100D

2100 Watt 5-Channel Amplifier

Razor Series 5-Channel Class D Amplifier • 80W x 4 Chan. @ 4 ohm • 120W x 4 Chan. @ 2 ohm • Dash Mount Remote Gain Control Included • 5-Channel Operation

Razor Series 5-Channel Class D Amplifier • 80W x 4 Chan. @ 4 ohm • 120W x 4 Chan. @ 2 ohm • Dash Mount Remote Gain Control Included • 5-Channel Operation

Audiopipe AQX-2500.1

2500W, Class D Monoblock Elite Series Car Amplifier

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Audiopipe AQX-2500.1

2500W, Class D Monoblock Elite Series Car Amplifier

• • • • • Description Coming Soon! • • • • •

• • • • • Description Coming Soon! • • • • •

JBL GTO1201.1II

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

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JBL GTO1201.1II

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

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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

Cerwin-Vega STEALTH500.4

600W 4-Channel Stealth Series Full-Range Class D Car Power Amplifier

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Cerwin-Vega STEALTH500.4

600W 4-Channel Stealth Series Full-Range Class D Car Power Amplifier

• 90W x 4-Chan. @ 4 ohm
• 150W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• 12dB Vega Bass Boost

• 90W x 4-Chan. @ 4 ohm
• 150W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• 12dB Vega Bass Boost

Kicker KXA1200.2 (44KXA12002) + High Quality NVX Amp Kit

1200W RMS KXA Class-D 2-Channel 2-Ohm Stable Amplifier

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Kicker KXA1200.2 (44KXA12002) + High Quality NVX Amp Kit

1200W RMS KXA Class-D 2-Channel 2-Ohm Stable Amplifier

• 300 Watts RMS x 2 @ 4 ohm
•600 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Aluminum Heatsink
• Dimensions: 8-5/16" W x 11-3/16" L x 2-1/8" H

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• 300 Watts RMS x 2 @ 4 ohm
•600 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Aluminum Heatsink
• Dimensions: 8-5/16" W x 11-3/16" L x 2-1/8" H

EXCLUSIVE

DLS X-D11

1050W RMS, X-Program Single-Channel Monoblock Class D Amplifier (12-31011)

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DLS X-D11

1050W RMS, X-Program Single-Channel Monoblock Class D Amplifier (12-31011)

X-Program Monoblock Class D Amplifier • 1050W • Dual Speaker Terminals • Preamp RCA outputs • 3-Way System Protection Circuitry • Speaker-Level Inputs • Variable Bass Boost • Variable Low-Pass Filter • Phase Shift

X-Program Monoblock Class D Amplifier • 1050W • Dual Speaker Terminals • Preamp RCA outputs • 3-Way System Protection Circuitry • Speaker-Level Inputs • Variable Bass Boost • Variable Low-Pass Filter • Phase Shift

MTX Audio RFL600D R/B

1200W Max, RFL Series Class D Monoblock Amplifier

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MTX Audio RFL600D R/B

1200W Max, RFL Series Class D Monoblock Amplifier

Single-Channel Monoblock Car Amplifier • RFL Series • Adaptive Class D Technology • 1200 Watts Max • 600 Watts @ 2 ohm • 350 Watts @ 4 ohm • Active Fan Cooling • Bass Boost • EBC • CEA-2006 compliant

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Single-Channel Monoblock Car Amplifier • RFL Series • Adaptive Class D Technology • 1200 Watts Max • 600 Watts @ 2 ohm • 350 Watts @ 4 ohm • Active Fan Cooling • Bass Boost • EBC • CEA-2006 compliant

EXCLUSIVE

JBL Subwoofer + Kicker Amplifier Upgrade Bundle

CS1214 250W 12" CS Series Subwoofer + KX200.2 200W RMS KX Series 2-Channel Amplifier + XKIT82 2-Ch 8 Gauge Amplifier Installation Kit

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JBL Subwoofer + Kicker Amplifier Upgrade Bundle

CS1214 250W 12" CS Series Subwoofer + KX200.2 200W RMS KX Series 2-Channel Amplifier + XKIT82 2-Ch 8 Gauge Amplifier Installation Kit

• Subwoofer: RMS Power: 250W
• Amplifier: 50W x 2 Chan. @ 4 ohm
• 100W x 2 Chan. @ 2 ohm
• 8 Gauge 2-Channel Complete Amplifier Installation Kit

• Subwoofer: RMS Power: 250W
• Amplifier: 50W x 2 Chan. @ 4 ohm
• 100W x 2 Chan. @ 2 ohm
• 8 Gauge 2-Channel Complete Amplifier Installation Kit

EXCLUSIVE

Audiobahn A18001DJ + Amplifier Kit

2500W Max, Single-Channel Class D Monoblock Car Amplifier + 1/0 Gauge Amplifier Kit + Ring Terminals

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Audiobahn A18001DJ + Amplifier Kit

2500W Max, Single-Channel Class D Monoblock Car Amplifier + 1/0 Gauge Amplifier Kit + Ring Terminals

Monoblock Class D Car Amplifier • MOSFET Power Supply • 700W RMS @ 4 ohm • 1300W RSMS @ 2 ohm • 2500W RMS @ 1 ohm • Dual Amplifier 1/0 Gauge Power Installation Kit • 3000 Watts Max • Direct-Connect Engineering

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Monoblock Class D Car Amplifier • MOSFET Power Supply • 700W RMS @ 4 ohm • 1300W RSMS @ 2 ohm • 2500W RMS @ 1 ohm • Dual Amplifier 1/0 Gauge Power Installation Kit • 3000 Watts Max • Direct-Connect Engineering

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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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