There's a video store opposite No.56, Block E.. There are speakers and speakers. (No.56, Block E, at the corner of the aisle, there are also some speakers and speakers for cars and small amplifiers. )
Besides,
There are also some shops in Block B, but I can't remember the exact number. One is opposite Block B, 18 (Jinri Electronics).
There seems to be a professional speaker shop in Block E, but I can't remember the exact location.
Go in from the northernmost back door of Guangchang South Road (into Block E), go straight for about 20 meters, and it's on the right side of the aisle. (The owner's surname is Yin) [There are many portable LCD TVs and DVDs in front of this store]
I hope this information can help you.
I am from Nanchang, too. I like having a fever, but I'm a beginner. I hope to communicate more in the future.
You can contact me through Baidu Hi ~ ~ I look forward to hearing from you ~ ~