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  3. Discontinued SPL Car Audio & Electronics
  4. Discontinued SPL Car Amplifiers
  5. Discontinued SPL 4-Channel Amplifiers

Discontinued SPL 4-Channel 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 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.
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.
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.

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You are currently viewing discontinued products.

SPL FX4-840

840W Max, FX Series 4-Channel Amplifier

FX4-840 big DISCONTINUED
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SPL FX4-840

840W Max, FX Series 4-Channel Amplifier

• 840W Max, FX Series 4-Channel Amplifier • 4 ohm: 80 watts x 4 chan • 2 ohm: 95 watts x 4 chan • Bridged, @ 4 ohm: 190 watts x 2 chan • S/N Ratio: 98dB • THD: 0.02%

11

• 840W Max, FX Series 4-Channel Amplifier • 4 ohm: 80 watts x 4 chan • 2 ohm: 95 watts x 4 chan • Bridged, @ 4 ohm: 190 watts x 2 chan • S/N Ratio: 98dB • THD: 0.02%

SPL FX4-1200

1200W Max, FX Series 4-Channel Amplifier

FX4-1200 big DISCONTINUED
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SPL FX4-1200

1200W Max, FX Series 4-Channel Amplifier

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

6

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

SPL GLA4-1800

1800W 4-Channel Gorilla Series Class AB Car Amplifier

GLA4-1800 big DISCONTINUED
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SPL GLA4-1800

1800W 4-Channel Gorilla Series Class AB Car Amplifier

• 4 ohm: 150 watts x 4-Chan.
• 2 ohm: 190 watts x 4-Chan.
• Bridged, 4 ohm: 380 watts x 2 chan.
• Max power output: 1800 watts x 2 chan.

2

• 4 ohm: 150 watts x 4-Chan.
• 2 ohm: 190 watts x 4-Chan.
• Bridged, 4 ohm: 380 watts x 2 chan.
• Max power output: 1800 watts x 2 chan.

SPL FX4-1600

1600W Max FX Series 4-Channel Amplifier

FX4-1600 big DISCONTINUED
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SPL FX4-1600

1600W Max FX Series 4-Channel Amplifier

• 1600W Max, FX Series 4-Channel • 4 ohm: 150 watts x 4 chan • 2 ohm: 180 watts x 4 chan • Bridged, @ 4 ohm: 360 watts x 2 cha • S/N Ratio: 98dB • THD: 0.02%

2

• 1600W Max, FX Series 4-Channel • 4 ohm: 150 watts x 4 chan • 2 ohm: 180 watts x 4 chan • Bridged, @ 4 ohm: 360 watts x 2 cha • S/N Ratio: 98dB • THD: 0.02%

SPL DK4-1000

1000W Max, Phantom Series 4-Channel Amplifier ( DK41000 )

DK4-1000 big DISCONTINUED
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SPL DK4-1000

1000W Max, Phantom Series 4-Channel Amplifier ( DK41000 )

SPL 4 Channel DK4-1000 1000W Max Amplifier • Full Mosfet Power Supply • 4 ohm: 85 watts x 4 chan. • 2 ohm: 105 watts x 4 chan. • Bridged, @ 4 ohm: 210 watts x 2 chan

1

SPL 4 Channel DK4-1000 1000W Max Amplifier • Full Mosfet Power Supply • 4 ohm: 85 watts x 4 chan. • 2 ohm: 105 watts x 4 chan. • Bridged, @ 4 ohm: 210 watts x 2 chan

SPL GRLA 1200/4 (GRLA1200/4)

1200W Max Gorilla Series 4-Channel Amplifier

GRLA1200/4 big DISCONTINUED
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SPL GRLA 1200/4 (GRLA1200/4)

1200W Max Gorilla Series 4-Channel Amplifier

Gorilla Series Class A/B 4-Channel Car Amplifier • 100 Watts x 4 Chan. @ 4 Ohm • 125 Watts x 4 Chan. @ 2 Ohm • 250 Watts x 2 Chan. Bridged • 1800 Watts Max • Regulated MOSFET PMW Power Supply • Preamp RCA Outputs

3

Gorilla Series Class A/B 4-Channel Car Amplifier • 100 Watts x 4 Chan. @ 4 Ohm • 125 Watts x 4 Chan. @ 2 Ohm • 250 Watts x 2 Chan. Bridged • 1800 Watts Max • Regulated MOSFET PMW Power Supply • Preamp RCA Outputs

SPL GLA4-400

400W 4-Channel Gorilla Series Car Amplifier

GLA4-400 big DISCONTINUED
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SPL GLA4-400

400W 4-Channel Gorilla Series Car Amplifier

• 4 ohm: 45 watts x 4-Chan.
• 2 ohm: 75 watts x 4-Chan.
• Bridged, 4 ohm: 150 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

1

• 4 ohm: 45 watts x 4-Chan.
• 2 ohm: 75 watts x 4-Chan.
• Bridged, 4 ohm: 150 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

SPL AX4-720

720W Max, E-FLUX Plasma Series 4-Channel Amplifier

AX4-720 big DISCONTINUED
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SPL AX4-720

720W Max, E-FLUX Plasma Series 4-Channel Amplifier

SPL AX4-720 720W Max, E-FLUX Plasma Series 4-Channel Amplifier • Full Mosfet Power Supply • 4 ohm: 85 watts x 4 chan. • 2 ohm: 100 watts x 4 chan. • Bridged, @ 2 ohm: 200 watts x 2 chan.

SPL AX4-720 720W Max, E-FLUX Plasma Series 4-Channel Amplifier • Full Mosfet Power Supply • 4 ohm: 85 watts x 4 chan. • 2 ohm: 100 watts x 4 chan. • Bridged, @ 2 ohm: 200 watts x 2 chan.

SPL DK4-680

680W Max, Phantom Series 4-Channel Amplifier ( DK4680 )

DK4-680 big DISCONTINUED
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SPL DK4-680

680W Max, Phantom Series 4-Channel Amplifier ( DK4680 )

SPL DK4-680 680W Max, Phantom Series 4-Channel Amplifier • Full Mosfet Power Supply • 4 ohm: 70 watts x 4 chan. • 2 ohm: 85 watts x 4 chan. • Bridged, @ 4 ohm: 170 watts x 2 chan

SPL DK4-680 680W Max, Phantom Series 4-Channel Amplifier • Full Mosfet Power Supply • 4 ohm: 70 watts x 4 chan. • 2 ohm: 85 watts x 4 chan. • Bridged, @ 4 ohm: 170 watts x 2 chan

SPL GLA4-900

900W 4-Channel Gorilla Series Car Amplifier

GLA4-900 big DISCONTINUED
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SPL GLA4-900

900W 4-Channel Gorilla Series Car Amplifier

• 4 ohm: 80 watts x 4-Chan.
• 2 ohm: 100 watts x 4-Chan.
• Bridged, 4 ohm: 200 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

• 4 ohm: 80 watts x 4-Chan.
• 2 ohm: 100 watts x 4-Chan.
• Bridged, 4 ohm: 200 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

SPL GRLA 1600/4 (GRLA1600/4)

1600W Max, Gorilla Series 4-Channel Amplifier

GRLA1600/4 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

SPL GRLA 1600/4 (GRLA1600/4)

1600W Max, Gorilla Series 4-Channel Amplifier

Gorilla Series Class A/B 4-Channel Car Amplifier • 150 Watts x 4 Chan. @ 4 Ohm • 80 Watts x 4 Chan. @ 2 Ohm • 360 Watts x 2 Chan. Bridged • 1600 Watts Max • Regulated MOSFET PMW Power Supply • Preamp RCA Outputs

3

Gorilla Series Class A/B 4-Channel Car Amplifier • 150 Watts x 4 Chan. @ 4 Ohm • 80 Watts x 4 Chan. @ 2 Ohm • 360 Watts x 2 Chan. Bridged • 1600 Watts Max • Regulated MOSFET PMW Power Supply • Preamp RCA Outputs

SPL GLA4-1200

1200W 4-Channel Gorilla Series Class AB Car Amplifier

GLA4-1200 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

SPL GLA4-1200

1200W 4-Channel Gorilla Series Class AB Car Amplifier

• 4 ohm: 100 watts x 4-Chan.
• 2 ohm: 125 watts x 4-Chan.
• Bridged, 4 ohm: 250 watts x 2 chan.
• Max power output: 1200 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

2

• 4 ohm: 100 watts x 4-Chan.
• 2 ohm: 125 watts x 4-Chan.
• Bridged, 4 ohm: 250 watts x 2 chan.
• Max power output: 1200 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply

SPL GRLA840/4

840W 4-Channel Class A/B Gorilla Series Car Amplifier

GRLA840/4 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

SPL GRLA840/4

840W 4-Channel Class A/B Gorilla Series Car Amplifier

Gorilla Series 4-Channel Car Amplifier • 80W x 4 Chan. @ 4 Ohm • 95W x 4 Chan. @ 2 Ohm • Bridged 190W x 2 Chan. @ 4 Ohm • Pulse Width Modulation Circuitry • Tri-Mode Capable • LED Power Indicators • Level Inputs

2

Gorilla Series 4-Channel Car Amplifier • 80W x 4 Chan. @ 4 Ohm • 95W x 4 Chan. @ 2 Ohm • Bridged 190W x 2 Chan. @ 4 Ohm • Pulse Width Modulation Circuitry • Tri-Mode Capable • LED Power Indicators • Level Inputs

SPL FX4-1200 R/B

1200W Max, FX Series 4-Channel Amplifier

FX4-1200 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

SPL FX4-1200 R/B

1200W Max, FX Series 4-Channel Amplifier

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

SPL FX4-1600 R/B

1600W Max, FX Series 4-Channel Amplifier

FX4-1600 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

SPL FX4-1600 R/B

1600W Max, FX Series 4-Channel Amplifier

• 1600W Max, FX Series 4-Channel • 4 ohm: 150 watts x 4 chan • 2 ohm: 180 watts x 4 chan • Bridged, @ 4 ohm: 360 watts x 2 cha • S/N Ratio: 98dB • THD: 0.02%

• 1600W Max, FX Series 4-Channel • 4 ohm: 150 watts x 4 chan • 2 ohm: 180 watts x 4 chan • Bridged, @ 4 ohm: 360 watts x 2 cha • S/N Ratio: 98dB • THD: 0.02%

 
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