Not sure what "hk nano 300" is. Do you have a link? If so, maybe we can figure out which subforum would be best to look for some help on that device.
Okay. So probably you should ask in one of the speaker subforums. However, if you want help then you shouldn't be lazy. You should make it easy for busy, yet very expert people to help you. You should do the googling, provide whatever useful links there are, and also state what information you are looking for, and or what problem you would like some assistance with. Otherwise if you are lazy and make other people do your work for you, then less likely to get much help. Not saying its a rule or anything, just that people are more likely to help in a useful way if you make it easy for them to get the information they might want or need to see in order to be most helpful.