If the price is similar, it is basically genuine; If the price difference is relatively large, it may be a fake.
Yamaha has a special authorized store. If it is not the store, it may be a fake.
You chat with the boss Wangwang and say that if it's a fake and the bass effect is not good, you can return it, and you can see something.
The things I bought in Taobao have been returned several times (once because the cheap HTC mobile phone screen is not easy to use; Another time, the air-cooled electric fan was not so good), because it is convenient to return the goods within 7 days (don't confirm the payment), so I am not afraid of things being bad.
I bought the Little Swan Polka washing machine (more than 300) from Taobao. 150? Beautiful? The induction cooker with temperature and time control has been used for several years, and there is no problem. Brand-name rice cookers and kettles are all bought in Taobao, which are very cheap and of good quality. It will arrive by express delivery in 2-3 days, so I have been shopping in Taobao, which is more reassuring.
I heard that things in JD.COM are more expensive, but I haven't bought them, so I can't comment.
Just go to these two stores to buy something yourself.
Just now, I specially watched two Yamaha YST-SW01subwoofer, JD.COM 749 and Taobao Yamaha Qiaohui Store 680.
Taobao's subwoofer used to be at this price, because it was a Yamaha store, and it was basically genuine.
The following is the Yamaha authorization from Taobao Tmall: