I write the review based on the principle of seeking truth from facts. Today I finally have some time to try the original Huangsheng K810 audio. The evaluation is as follows: The Huangsheng 600 model amplifier is good, without any Noise, plenty of power. I can answer questions raised by netizens in some forums. Because I am a veteran wireless engineer for more than 30 years, I still understand the sound effects. Howling: The room is too small. Don’t point the microphone at the speaker. Turn down the microphone volume. Noise: There is a problem with the speaker cable connection, the binding posts are not connected properly, and the power plug is loose. Karaoke effect: Appropriately adjust the sound ratio of reverb, delay, microphone and music. The whole set of audio equipment is as described, equipped with Huangsheng K3 pre-amplifier, which is very good! The bass of Huangsheng K810 is very shocking, the treble is very clear, and there is no current sound. The overall feeling is very good, and the sound quality meets my high requirements. If you want to examine its durability, it will take time and complex music to test it. Anyway, at present It is a very cost-effective karaoke audio set, and there is no problem with the speaker effect! very good! Not to mention service and logistics! all is well! This is my true feeling! It is right to choose the famous brand of Huangsheng Audio! The effect is really good!