Sinbosen D4-2000 Digital power amplifier VS other similar products

Sinbosen D4-2000 Digital power amplifier VS other similar products

Summary

An old customer said that he found a digital power amplifier that claims to be able to reach 1800 watts per channel. The price is also very cheap. It seems to be a product with a "market advantage". But after testing the samples he bought back, he Found that the power is insufficient and the sound is'particularly bad and vague'

Sinbosen D4-2000 VS other similar products

We often say that high cost performance is truely cheap. Low price is not really cheap. You have to look at the quality and the materials.

Some suppliers’ power amplifiers seem to be fine at first glance, and the parameters are also very high. When asked about the price, wow, cheap. Many people think that it is cost-effective. It seems that if you buy it, you make a profit. But what is the truth? ? There is also a saying in China, don’t worry about not being able to identify the quality of the goods, just compare the goods of several companies to know.

Today’s article is because an old customer said not long ago that he found a digital power amplifier that claims to be able to reach 1800 watts per channel, and the price is very cheap. It seems to be a product with a "market advantage". But testing After buying the sample, he found that the power was insufficient and the sound was'particularly bad and vague'.

After understanding the details, Sinbosen bought back the same power amplifier and compared it with Sinbosen's D4-2000 to see where the gap was.
Size

It is also 1u in height, but the cheap 4--1800 (for easy distinction, we will give it a code of '4-1800') is smaller in width, and some people may think that it does not matter if it is smaller. , But this will affect the amount of'content' inside
Inside

Still in the picture above, we can clearly see that the Sinbosen D4-2000 on the right is very full, and the space inside is not left empty and wasted. The 4-1800 on the left has already been in volume. It's small, and most of the space inside is left empty. It's a bit like, I will give you a big carton , and there are only a few in it, but I tell you that this is one carton of apples .
Sinbosen D4-2000
Framework

First of all, we can see that the length difference of the radiator is very obvious, and the heat dissipation performance of Sinbosen D4-2000 is definitely due to the 4-1800 next to it.

Second is the inductor. From the comparison chart, we can also see that the number of inductors is also very different. Inductors have the functions of filtering signals, filtering noise, stabilizing current and suppressing electromagnetic interference. The quality and quantity of the inductor will affect the sound quality of the output sound. Sinbosen uses imported inductors, and the size and quantity are better. From the actual audition effect, we found that 4-1800 is the same as Sinbosen D4-2000 For music, the output sound of the same speaker is very different, 4-1800 is far from the clarity of Sinbosen D4-2000. The sound is very muddy.

Third, we also found that there is no relay in 4-1800. The relay is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. Therefore, it is conceivable that the safety of circuits with relays is greatly increased.
Sinbosen D4-2000
Sinbosen D4-2000
Sinbosen D4-2000
Material

Everyone knows that the output port of Sinbosen's high-end power amplifier uses Nutrick, and the quality is much better than the ordinary interface used in 4-1800.
The number of transistors is also inconsistent, there are only 4 in 4-1800, and Sinbosen D4-2000 is twice his.
Sinbosen D4-2000