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CAR AMPLIFIERS INFORMATION:

mplifiers take a signal from a source and produce a larger one. This process makes the sound powerful. The main challenge of any amp is to amplify the signal without producing any distortions. Amplifiers must maintain sufficient power and thats why they have a powerful power supply. Many car owners add amplifiers to maximize their sound performance and quality.

How do car amplifiers work?
A cassette radio or CD player produces a maximum of about nine real watts into four speakers given the power it gets from the car's electrical system. So what if you want more than nine real watts to power each of the speakers? You obviously need an amplifier. Amplifiers give more power allowing you to play your music more loudly. Amplifiers also improve the sound quality of music at all volume levels.

Features of Car Amplifiers:

Are you looking for the right amplifier for your car? There is no doubt that choosing the right amp can be a challenging and complicated. Below are some things you need to look for before you buy any car amplifier.

Bridging (Bridgeable Amplifiers):
To understand amplifier bridging, we need to know what it means. Amplifier bridging is basically using 2 channels of an amp to drive a common load. Bridgeable amps have a huge advantage of being able to use them in different system configurations. 4 channel amplifiers, for example, can be used to power four, three or even one speaker if you decide to change it.
Why do I need to bride an amplifier?
Sometimes you need to bridge your car amplifier to maximize power to your speakers and enhance sound performance.

Speaker-level inputs:
Since most factory stereos dont have amplifier outputs, then the only way to wire your amp is through your radios speaker wires. The main advantage of Speaker-level inputs is being able to hook up an amplifier to your factory stereo system.

Remote bass control:

Its useful to have a remote bass control because gives you the flexibility to change the output level (power) of the amp from anywhere in the car. The remote bass control knob can be placed anywhere to easily adjust power (or bass) to your subwoofers.

High-pass filter/low-pass filter/crossover:
Filters let you adjust the frequencies you send to the speakers or subs. High-pass filters eliminates can be used to prevent speaker damage caused by low frequencies. The low-pass filters however, eliminate high frequencies the sub cant handle.

Bass boost:
Bass boost is a circuit in your amplifier that improves the bass even if you dont have a subwoofer. This can be useful if you need more bass in your system.

Buying the right amplifier is not an easy task due to the technical issues involve. Make sure to understand what you exactly need the amplifier for. This can help you buy the right amp for the budget you can afford.

Amplifiers classes:

Car Amplifiers are clasified by 5 main classes:

Class A Amplifiers:
Although class A amps provide clear sound, they are considered to be inefficient because they get heated very fast. Class A amplifiers also dont provide enough power for the effort they consume. Class A amplifiers are ideally used for car tweeters.

Class A/B
Unlike class A amps, class A/B amps are considered to be more efficient but produce more distortion. A class A/B car amplifier is formed when a class B style output stage is biased so that around the crossover point both transistors are conducting. This yields more distortion than either a proper class A or class B amplifier, however the bias point is much less critical.

Class B amps consist of two transistors, one for each supply rail. In properly-biased class B, only one conducts at a given time, but there is always one conducting. Much of the bad name class B has is due to amplifiers actually being underbiased into class C where there's a portion of the cycle around the crossover point where neither is conducting.
Furthermore, Class B proper biasing may be made very difficult to achieve due to thermal stability issues (especially proper thermal coupling and tracking between the biasing circuit and the output power devices). Class C amplifiers are useless for audio. They are used in RF applications where the harmonics can be filtered out. Nonetheless, the so called "Class G" is just the plain combining of a normal Class AB car amplifier output stage with a Class C "booster" enabled to operate only if high power peak are required by the load. If properly designed they performances are equivalent to that obtained by normal class AB amplifiers.

Class D amplifiers are a rather new phenomenon in the hifi world. They are extremely efficient (80%) and can give a very good result. They use pulse width modulation to amplify the signal; this lets them use the output transistors in switch mode where they're most efficient and dissipate the least power. Originally only for subwoofers, newer designs have since surfaced making this technology capable of sounding very good as a full-range amplifier.

A class D amplifier is one in which the output transistors are operated as switches. When a transistor is off, the current through it is zero. When it is on, the voltage across it is small, ideally zero. In each case, the power dissipation is very low. This increases the efficiency, thus requiring less power from the power supply and smaller heat sinks for the amplifier. These are important advantages in portable battery-powered equipment. The D in class-D is sometimes said to stand for digital. This is not correct because the operation of the class-D amplifier is based on analog principles. There is no digital coding of the signal. Before the advent of the class-D amplifier, the standard classes were class-A, class-AB, class-B, and class-C. The D is simply the next letter in the alphabet after C. Indeed, the earliest work on class-D amplifiers involved vacuum tubes and can be traced to the early 1950s.

The high switching frequency used in class-D amplifiers is a potential source of rf interference with other electronic equipment. The amplifiers must be properly shielded and grounded to prevent radiation of the switching harmonics. In addition, low-pass filters must be used on all input and output leads, including the power supply leads.

Amplifier Classes Comparison:

Amplifier Class

Advantages

Disadvantages

Class A Amplifiers

  1. Low Distortion due to low frequency compensation.
  2. Circuit simplicity compared to other amp classes.
  1. Generate lots of heat.
  2. Don’t provide enough power for the effort they consume.

Class A/B Amplifiers

  1. More efficient than class A amps.
  1. High distortion.

Class B Amplifiers

 

  1. High crossover distortion.

 

Class D Amplifiers

  1. Very efficient due to low power indulgence.
  2. Low power consumption.
  1. RF interference with other components.
  2. Must be properly shielded and grounded to avoid radiation.


See also: Cheap Car Amplifiers - JVC Arsenal Amplifiers


CAR AMPLIFIERS NEWS:

Bose Ships New Line of PowerShare Amplifiers - Audio Visual News Network

Bose Ships New Line of PowerShare Amplifiers
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The What: Bose is now shipping its new PowerShare adaptable power amplifier line, consisting of three 1U models: two- and four- channel fixed-install models (PS602 and PS604) and one two-channel portable amplifier (PS602P). Each model delivers 600 ...

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Sennheiser ups its game with new headset and two gaming-focused audio amps
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Both the new GSX 1000 and GSX 1200 Pro amplifiers use Sennheiser's brand new Binaural Rendering Engine to offer an immersive audio experience delivered through the user's headphones. There is no need to install additional drivers to use either ...

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Fairview Microwave Releases Family of Coaxial Packaged Bi-Directional Amplifiers - PR Newswire (press release)

PR Newswire (press release)

Fairview Microwave Releases Family of Coaxial Packaged Bi-Directional Amplifiers
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ALLEN, Texas, Aug. 16, 2016 /PRNewswire/ -- Fairview Microwave Inc., a supplier of on-demand microwave and RF components, offers a line of coaxial packaged bi-directional amplifiers used for transmitting and receiving RF signals in popular applications ...

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In-Vehicle Amplifiers: AudioControl LC-4.800 - Twice

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In-Vehicle Amplifiers: AudioControl LC-4.800
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TWICE VIP Award 2016 Winner! AudioControl's new LC-4.800 amplifier was engineered and developed to be an integration solution for today's factory-installed audio systems. AudioControl engineers incorporated six speaker-level inputs that allow summing ...

Sound Media Debuts Newly Acquired Powersoft X4 Amplifiers at Tabernacle of Glory Church's Arise and Shine ... - Broadcasting & Cable

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Sound Media Debuts Newly Acquired Powersoft X4 Amplifiers at Tabernacle of Glory Church's Arise and Shine ...
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“We have had Powersoft K Series amplifiers for a while and have been very pleased with their performance,” he says. But when they were hired to deliver sound for Tabernacle of Glory church's Arise and Shine Conference, held at the 8,000-seat BankUnited ...

Thulium-doped fibers promising for high-power laser amplifiers - SPIE Newsroom

Thulium-doped fibers promising for high-power laser amplifiers
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Unfortunately, all high-power amplifiers are subject to thermal problems, i.e., heat is always generated because of the quantum defect (the difference in energy between the pump and signal photons). In recent years, however, remarkable progress has ...

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Power amplifiers for 5G made of gallium nitride - Phys.Org

Phys.Org

Power amplifiers for 5G made of gallium nitride
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The power amplifier of the Fraunhofer IAF transmits at a frequency of 5.8 gigahertz. This frequency is needed for the new 5G mobile radio standard. The centrally placed gallium nitride (GaN) semi-conductor circuits are the central part of …more. The ...

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CEDIA Q&A: AudioControl's Architect Distributed Audio Amplifiers Take Power to the Next Level - CEPro

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CEDIA Q&A: AudioControl's Architect Distributed Audio Amplifiers Take Power to the Next Level
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We will be launching our new Architect distributed audio amplifiers that offer higher power levels, digital audio inputs and feature compact 1U and 2U chassis. Additionally our new Director 'M' series offers full signal matrixing that allows the ...
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Unity Gain: 104 Powersoft K10 Amplifiers Combine to Drive Messaging for Democratic National Convention in ... - Broadcasting & Cable

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Unity Gain: 104 Powersoft K10 Amplifiers Combine to Drive Messaging for Democratic National Convention in ...
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The four-day event — whose underlying purpose is to select the Democratic Presidential and Vice Presidential nominees for the highest office in the land — relied on 104 Powersoft K10 amplifiers to deliver ultra reliable, high quality audio for more ...

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Sennheiser Announces GSX 1000, GSX 1200 PRO Gaming Audio Amplifiers - Custom PC Review

Custom PC Review

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Following Sennheiser's launch of the GSP 300 gaming headset, Sennheiser is also launching the GSX 1000 and GSX 1200 PRO gaming audio amplifiers. Key features of the Sennheiser GSX 1000 include an onboard DAC (Digital to Analog Converter), ...


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