HONGCHANG(CHANGZHOU) ELECTRONIC CO.,LTD as a professional 4 ohm 15 watt speaker manufacturer and supplier in China, all the 4 ohm 15 watt speaker have passed the international industry certification standards, and you can be completely assured of quality. If you do not find your own Intent 4 ohm 15 watt speaker in our product list, you can also contact us, we can provide customized services.