The quality and efficiency of modern Class D amplifier have improved significantly in comparison to what had been 20 years ago, as technology of semi-conductors has made a quantum leap over the years. In fact, Class D amplifiers have occupied 99% of the 3C device (mobile phones, computers, and even televisions) market. Gradually and unwittingly, out of your desire, we can no longer live without the sound produced by Class D.

Not only the Class D amplifier is known for having a high efficiency, its sound quality in terms low frequency energy is usually better than other amplifiers in class. This could be that Class D amplifiers frequently use a Power MOS, which is very low in its “turn-on resistance”, as the output component. However, most of complaints focus on the high frequency tone, which is generally said to have some rooms for improvement.

Class D amplifiers adopt PWM technology, and therefore the low-pass filter at the output must exist to filter modulation frequency that is above 500kHz. The quality of this filter is known to impact significantly on the sound quality, especially the high frequency tone can be mostly influenced.

Clover audio re-designs the LC filter for the Class D amplifiers out of passion and persistence to the quality of sound. The ferrite core we use comprises a special material that is capable to carry high linearity and high saturation magnetic flux. The inductor made by such ferrite core promises to maintain a regular inductance even under a massive current; by having this characteristic, non-linear distortion in the nature of Class D can be significantly reduced. This renovated filter also increases the ability of an amplifier to endure a frequency range up to 50kHz, in order to satisfy the need of HD audio. As a result, the high frequency tone gives a smooth feeling while the low frequency tone demonstrates its powerful impulse—it gives an excellent performance no matter played under what volume of sound.

Don’t underestimate the ability of CA-701! This small box is capable to give out an output of 50W for every sound channel, and also it has an incredible efficiency. You don’t need to worry about using too much power—even if it’s been playing your favorite music ALL day!