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Before the sound comes out from the speakers. It just bunch of numbers and electric current pulse. To drive the speakers we need to amplify that signal. Different size of the speaker has different need of amplification. We call that power "Watt" There are different class of amplification developed over the years. You can see below show the different approaches. Each has its pros and cons. Most popular ones are Class AB and Class D. See the list below for the details:
Efficiency is most important for the amplifier. Its calculated by power consumption compare to the output sound power. Class D is the best amount all. You can see all class amplifier efficiency listed below.
Recent years the advanced Class D amplifier makes it a popular choice over others. There is one more type of the amplifier that is also popular in audiophile world.
Why Old Tube Amplifier?
Tube Amplifier is an old design use vacuum tube to amplifier the sound. Modern days we don't really need it any more because its low efficiency. However, many audiophile still buying and making them because of euphoric distortions they add to the music. Many people referred this harmony distortion as warmth that makes the music sound better. Today it is popular to use tube in the pre amps to add euphoric sound. Below is the analysis of the output signal from tube amp you can see the rich harmony it add to the original sound.
OPSIS II used latest Class D amplifier that has >90% efficiency and less then 1% distortion at high volume to make sure the reproduced audio quality. This also ensure the lowest battery power consumption.
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在揚聲器發出聲音之前。它只是一堆數字和電流脈衝。要驅動揚聲器，我們需要放大該信號。不同大小的揚聲器具有不同的放大需求。我們稱這種功率為“瓦特”，這幾年來開發了不同類別的放大方法，每個都有其優點和缺點。最受歡迎的是AB類和D類。有關詳細信息，請參見下面的列表：
效率對於放大器而言至關重要。通過功耗計算得出的功率與輸出聲功率進行比較， D類是最好的。您可以看到下面列出的所有類放大器效率：
近年來，先進的D類放大器使其成為了其他產品的熱門選擇。放大器的另一種類型在發燒友界也很流行。
真空管放大器
是一種古老的設計，使用真空管來放大聲音。現今社會我們其實真的不再需要它了，因為它的效率很低。但是，許多發燒友仍在購買並製作它們，因為它們使音樂增添了很有趣的失真效果。許多人將這種和聲失真稱為”溫暖“，可以使音樂聽起來更好。如今，在前級放大器中使用電子管來增加欣快的聲音是很流行的。下面是對電子管放大器輸出信號的分析，您可以看到它為原始聲音增加了豐富的和聲。
OPSIS II使用了最新的D類放大器，而且該放大器具有> 90％的效率，大音量時失真率不到1％，以確保再現的音頻質量，這也確保了最低的電池功耗。
更多資訊：