Tip : Any issue about item, feel free to contact our customer service firstly in message, we will offer you best solution until you are satisfied. Notes: Not for trucks. Max Output Power: 1200W. High level Input Sensitivity: 0.9v. Low Level Input Sensitivity: 300mV. Low Pass Filter: 50-150Hz. Fully functional and easy to debug. Slim fuselage, installed under the seat. Design of high temperature resistant coil. Fine workmanship and good performance. 6″8″ speaker gives A different kind of heavy bass effect. But, we’d like to assist you to receive the goods smoothly if there are anything we can do here. We will check and offer a good solution to you. Reason is because transit time is highly depended and provided by postal service (except weekends and holidays). We are only responsible for once re-sending expense for replacement due to defects. We have always been doing our best to provide the best service and reliable products for every customer. We will reply your emails and questions within 24 hours.