Hello all,
I was very interested in the SA300 at the same time as the announcement, but there was little review information and I was confused about the purchase, but I decided to buy it.
Below is the impression I used
We use SMSL M500, Topping DX3 Pro, D50s USB-DAC connected to the RCA input, but it's a nice and clean sound.
The sound rises quickly, and the sound field expression is full of high-speed, wide-range and full of transparency.
Until now, we have purchased and used many highly-rated Chinese digital amplifiers such as Topping TP60 PA3, SMSL SA-98E, and INDEED, but this unit completely outperforms them.
Infineon is a German company but MERUS MA12070 chips are born in Denmark. I think its ability is amazing. Until now, STMicro's TDA7498E chip was the most popular, but it completely outperforms it.
However, there is no detailed measurement data for SA300. I hope that it will be measured as soon as possible on the ASR Forum.
The USB connection was automatically recognized as headphones (TX 384kb Hifi Type_C Audio) in Windows 10.
The sound quality of the USB input of this unit is unfortunately inferior to the sound connected to an external USB-DAC of SMSL M500 or Topping D50s, but it is sufficient for the purpose of casual playback from a PC or smartphone.
There is no pop noise associated with turning the power on and off. The white noise coming out of the speaker is only slightly felt by maximizing the volume and sticking the ear to the speaker cone. White noise is the smallest of the D-class amplifiers I have used so far.
The spelling of the ROCK in the EQ setting was RCOK in the product at the time of release, but it was corrected in the M500 I purchased.
The supplied AC adapter is sufficient, but I am connected to a 26V / 10A power supply for full performance.
One of the complaints about this unit is that it cannot adjust the brightness of the display, nor can it be turned off. I want an auto function that turns off the display after a certain time.
No product defects have been found so far.
I purchased an additional blue body because of the good sound of the SA300.