mono means the amplifier is setup to drive from one output.
its possible that a mono amplifier is actually designed to drive two speakers in series.
class a/b is an analog amplifier
it gets its power from the battery and depending on the amplifier, the power will be raised or lowered at the first stage.
these are high dollar amplifiers if you want them to sound really really detailed because the pieces inside will need to be high quality.
a class D amplifier is a bit different.
the power comes from the battery and depending on the amplifier, the voltage will be lowered or raised.
what is different about a class D amplifier and a class a/b amplifier are first of all, the pieces inside the amp.
generally, they react different when voltage is applied to them.
they also react differently when they release voltage.
a controller of some sort emits electricity in a pattern optimized for the pieces used inside the amplifier.
its like a specific strobe light pattern that may be steady or it may change as a sequence.
either way, the pulsing is designed to match the design needs of the pieces inside the amplifier.
when you match the correct piece on the circuit board with the correct input voltage pattern, pure magic happens as the components (pieces) inside the amplifier twist and shout.
see, normally a component will receive a dull and boring input and will have a dull and boring output.(class a/b)
but with a class D amplifier, the component will receive a unique voltage input pattern that will provoke (or invoke) either a solid output or a very broad burst of energy for whatever duration the piece is designed for.
if you applied dull and boring voltage input into one of these pieces, it wont output the same (if at all)
if you need a simpler example, here:
class a/b pieces are like a person walking around constantly angry.
class D pieces are a like a person that only gets angry when they listen to somebody talking and the words that were said made them angry.
the point of anger (really) is equivalent to outputting voltage.
class D amplifier designs are basically an expert level of design for experienced designers.
these amplifiers will also have a high price tag because of the amount of design needed (which could be said to be the same as a class a/b amplifier because they both have to be designed so that the final result isnt highly embarassing)
you will pay more for higher wattage with either amplifier type.
but depending on the manufacturing market, class D amplifiers might not have many choices to choose from.
or
the choices available might not be of high quality.
see.. with class D amplifier pieces, you have to first make the piece work unique.
and then you have to make them work unique with the ability of providing details into the audio.
just because they light up really bright when they receive the correct pattern, that doesnt mean the light is clear.
that doesnt mean the light doesnt blink or twinkle as it shines bright.
class a/b amplifier pieces are much more simple.
they have to shine when given electricity.. and they have to maintain that light without flickering or twinkling.
class D amplifier pieces have to have a flickering or twinkling input voltage to make them shine.
therefore they have an added point of complexity.
the reason why class D amplifiers dont suck up as much electricity when you run them is because of one of two reasons:
1. the voltage is increased as soon as it enters the amplifier
2. the blinking or twinkling of the input electricity makes the amplifier pieces shine brighter.
a class a/b amplifier can be just as efficient if the industry made those amplifiers widely available.
but that is an industry choice as class D amplifiers go from being a new baby into a mature technology.
giving people a good reason to purchase class D amplifiers helps designers learn problems with old designs and will help them create upgraded designs.
common failure points is always an issue.
but component longevity is also an important concern.
class a/b amplifier pieces might grow dull over time.
but class D amplifier pieces might stop reacting to the blinking or twinkling input.
the class D amplifier pieces might start to blink or twinkle themselves.. or completely stop producing output.
class D pieces are a toy and an infant for leading design.
its an alternative route that stems from the easier older method.
much like LCD televisions are an alternative to CRT televisions.
it just happens to be that forcing an electron gun onto a screen was easier than mixing whatever necessary to change colors and produce accurate colors (and do it fast enough for motion video)
the idea behind class D amplifiers isnt to say proudly how accurate and detailed they sound.
its all about buying them because they suck up less power so that they can break and leading designers can learn from any mistakes.
above all else, class D amplifier pieces have developed enough to at least be used for subwoofer amplifiers.. and there is no need to wait any further for them to have detail and accuracy for midrange and treble.
its kinda like having a snack before dinner.
but in the end.. its all about the step-up transformer and the quality of the pieces inside that wins.
the class D amplifiers are using a technique that allows them to output much more electricity than taken in.
again with the angry person example.
the analog class a/b pieces are constantly angry.
but the class D pieces are spoken to and provoked.. sending them into a violent rage as they lash out in anger.
a class a/b amplifier piece might have a ratio of like 1:3 or 1:4
but a class D amplifier piece has a ratio of like 1:6 through 1:10
its all about the chemists who are making the goop that the pieces are made of.
a thrown off example:
one solar panel of 12ft by 12ft might provide enough power to run a computer.
but the new and improved state-of-the-art solar panel that is 12ft by 12ft might provide enough electricity to power an entire house.
again, its the ratio of quality and design.
class a/b amplifiers have been around longer and are easier to design, therefore its easier to find an amplifier of this type that can produce highly accurate sound reproduction.
you will either have to suffer because they suck up more electricity.. or you will have to use the benefit of going to college and learning how to swap out the step-up transformer to something more efficient.
its kinda like a graduation prize for electronics engineers.
an important part of capacitors is the ratio of how much electricity they put out, and also how fast they can output that electricity when its needed.
obviously if your pieces are constantly ready and listening to do what they are told, the soundwaves will be the right shape.
those pieces that are lazy and not listening will be slow to react and it will make the soundwave suffer.
playing a single note is not the same as playing music.
the difference is like a semi truck with only one thing inside of the trailer compared to a semi truck with thousands of things inside.
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