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

Discontinued Pyramid 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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Pyramid PB618

1000W Max Class A/B 4-Channel America Series Car Amplifier

PB618 big DISCONTINUED
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Pyramid PB618

1000W Max Class A/B 4-Channel America Series Car Amplifier

merica Series 4-Channel Class A/B Car Amplifier • 1000W Max x 2 Channels • 2000W Max x 1 Channel Bridged @ 4 ohm • Variable Electronic Crossovers • Variable Bass Boost • High/Low Level Inputs • RCA Preamp Output

merica Series 4-Channel Class A/B Car Amplifier • 1000W Max x 2 Channels • 2000W Max x 1 Channel Bridged @ 4 ohm • Variable Electronic Crossovers • Variable Bass Boost • High/Low Level Inputs • RCA Preamp Output

Pyramid PB442X

300W Max 4-Channel Super Blue Series Car Amplifier

PB442X big DISCONTINUED
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Pyramid PB442X

300W Max 4-Channel Super Blue Series Car Amplifier

300W 4-Channel Super Blue Series Amplifier • 75W x 4 Channel Power Output • Variable Gain Control • Remote Turn-On • Bass and Treble Control • MOSFET Power Supply

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300W 4-Channel Super Blue Series Amplifier • 75W x 4 Channel Power Output • Variable Gain Control • Remote Turn-On • Bass and Treble Control • MOSFET Power Supply

Pyramid PB448X Super Blue Series

PB448X big DISCONTINUED
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Pyramid PB448X Super Blue Series

1000W 4 channel Super Blue Series Amplifier • 250W x 4 channel power output • tri-way config 4/3/2 channels • variable gain control • remote turn on/off • bass and treble control • MOSFET power supply

1

1000W 4 channel Super Blue Series Amplifier • 250W x 4 channel power output • tri-way config 4/3/2 channels • variable gain control • remote turn on/off • bass and treble control • MOSFET power supply

Pyramid PB1617X

500W Max, 4-Channel Arctic Series Class A/B Car Amplifier

PB1617X big DISCONTINUED
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Pyramid PB1617X

500W Max, 4-Channel Arctic Series Class A/B Car Amplifier

Arctic Series 4-Channel Class A/B Car Amplifier • 4 ohm: 75 watts x 4 chan. • 2 ohm: 120 watts x 4 chan. • Max power output: 500 watts

Arctic Series 4-Channel Class A/B Car Amplifier • 4 ohm: 75 watts x 4 chan. • 2 ohm: 120 watts x 4 chan. • Max power output: 500 watts

Pyramid PB845X Royal Red Series

PB845X big DISCONTINUED
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Pyramid PB845X Royal Red Series

1200W Royal Red Series 4-Channel Bridgeable Amplifier

1200W Royal Red Series 4-Channel Bridgeable Amplifier

Pyramid PB680 Crystal Series

PB680 big DISCONTINUED
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Pyramid PB680 Crystal Series

1000W 4 channel Crystal Series Amplifier • 250W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

1000W 4 channel Crystal Series Amplifier • 250W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

Pyramid PB880 Crystal Series

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Pyramid PB880 Crystal Series

1200W 4 channel Crystal Series Amplifier • 300W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

1200W 4 channel Crystal Series Amplifier • 300W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

Pyramid PB1080 Crystal Series

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Pyramid PB1080 Crystal Series

1400W 4 channel Crystal Series Amplifier • 350W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

1400W 4 channel Crystal Series Amplifier • 350W x 4 channel power output • plexiglas top panel • fully adjustable electronic crossover • variable bass boost • digital VU level meters • Dual MOSFET PWM Power Supply • LED power and protection indicators • H

Pyramid PB1475 Power Series

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Pyramid PB1475 Power Series

1600W 4 channel Power Series Amplifier • 400W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

1600W 4 channel Power Series Amplifier • 400W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

Pyramid PB1045X Royal Red Series

PB1045X big DISCONTINUED
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Pyramid PB1045X Royal Red Series

1600W Royal Red Series 4-Channel Bridgeable Amplifier

1600W Royal Red Series 4-Channel Bridgeable Amplifier

Pyramid PB275 Power Series

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Pyramid PB275 Power Series

360W 4 channel Power Series Amplifier • 90W x 4 channel power output • chrome finish with clear top-view panel • Hi/Lo electronic crossover with bass boost • remote turn on/off • high & low level inputs • gold plated RCA inputs • Hi level MOLEX inputs

360W 4 channel Power Series Amplifier • 90W x 4 channel power output • chrome finish with clear top-view panel • Hi/Lo electronic crossover with bass boost • remote turn on/off • high & low level inputs • gold plated RCA inputs • Hi level MOLEX inputs

Pyramid PB251 Artic Series

PB251 big DISCONTINUED
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Pyramid PB251 Artic Series

300W x 4 channel Artic Series Amplifier • gold plated RCA low level high impedance inputs • overload and short circuit protection

300W x 4 channel Artic Series Amplifier • gold plated RCA low level high impedance inputs • overload and short circuit protection

Pyramid PB645X Royal Red Series

PB645X big DISCONTINUED
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Pyramid PB645X Royal Red Series

1000W Royal Red Series 4-Channel Bridgeable Amplifier

1000W Royal Red Series 4-Channel Bridgeable Amplifier

Pyramid PB675 Power Series

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Pyramid PB675 Power Series

800W 4 channel Power Series Amplifier • 200W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • adjustable Hi/Lo electronic crossover network • variable bass boost • remote turn on/off • soft turn on circuitry • Hi l

800W 4 channel Power Series Amplifier • 200W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • adjustable Hi/Lo electronic crossover network • variable bass boost • remote turn on/off • soft turn on circuitry • Hi l

Pyramid PB875 Power Series

No picture DISCONTINUED
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Pyramid PB875 Power Series

1000W 4 channel Power Series Amplifier • 250W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

1000W 4 channel Power Series Amplifier • 250W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

Pyramid PB1075 Power Series

No picture DISCONTINUED
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Pyramid PB1075 Power Series

1400W 4 channel Power Series Amplifier • 350W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

1400W 4 channel Power Series Amplifier • 350W x 4 channel power output • fan cooling system • chrome finish with clear top-view panel • dual adjustable Hi/Lo electronic crossover network • dual variable bass boost • remote turn on/off • soft turn on circu

 
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