I have been confident in Yaqin since I bought the Yaqin 300B amplifier 7 years ago. This time I changed to 90B because I was attracted by the high-quality appearance, and with the addition of 10 vacuum tubes, I couldn't help it.
When I first received the tube amplifier + speaker, the sound was unbearable, and it became better and better after a few days of boiling. I believe it will sound better in time. Highlights: 1) Bluetooth 5.0 can be played by mobile phones, supports aptX format, and the effect is no different than the connection. 2) It comes with bias gauge and adjustment hole, which is very convenient. 3) Three output options, there is always one suitable for audio and ears. Comparing the vacuum tube KT88 with the previous 300B: KT88 has a larger thrust, a more stable bass, and a louder volume. The Vocal 300B is warmer, but this is a new amplifier + new speakers. Compared with the old amplifier speakers, the conclusion may be too early. Surprise: Yaqin is really sincere，The speakers are also beautiful and heavy.
