First of all: small size, under the same sound quality, the recorder is small and easy to carry. In fact, it was just for convenience at first.
Second: The sound quality is excellent. The sound quality that music enthusiasts usually listen to is the high-demand WAV sound quality, and some people even pursue lossless sound quality, so the general sound source is derived from the hands of the recording engineer.
A portable recorder is usually a must-have tool for those engaged in audio work. And its playback quality, due to the needs of professional applications, must reach a certain level or more. Therefore, a recorder can meet most of the needs of listening to music.
Audio recorders were first used to "replace" players in the audio professional circle. The price was not cheap. Of course, they will become more and more quasi-professional, semi-professional, and even non-professional to promote the direction of imitation.
In addition, there are many self-proclaimed enthusiasts on the market. Forum comments, bragging is innate, attacks and scolding make it impossible for people to judge whether they are true or false.
But high-quality voice recorders, more than a dozen brands, almost every one of them has excellent products, which can be trusted. These brands do not need to do word-of-mouth marketing.