Official Affirmation: Greetings, dear friends! We affirm that all products sold in our store are genuine and new, and we do not do the sale of second-hand products. Ocean to Mexico on the way, there may be bumps in the packaging, I hope you forgive your friends, but please believe that we sincerely treat your friends, and to ensure that the best products to bring you! If you have any questions you can ask a message, we will also be the first time to give you a reply! We would like to thank you all! ADHRAHMXRFeatures:Advanced 2.1CH Bluetooth 5.0 Receiver Amplifier achieves HiFi music quality, the best choice for your homeaudio entertainment. You can connect passive speakers passive subwoofer powered speakers poweredsubwoofer to DIY a stereo sound systemn.Fosi Audio BT30D Pro is the upgraded version for BT30D.A11-NEW Black Aluminum Appearance. BT30D VSBT30D Pro: MAX Power Output: 50 Watt x2+100 Watt VS 165 Watt x2+350 Watt, Amplifier Chip:IPA3116D2 VS TPA3255. 0utput: RCA output for powered subwoofers VS 3.5MM full-range output forpowered subwoofers and speakers. Just choose one model for your needs.BT30D Pro Adopts 2PCS Texas Instruments TPA3255 high-performance Class-D power amplifier chip. BT30DPro can drive up to 2 x 175 W into 4- load and 2 x 220 W into 3-9 load, In addition to excellent audioperformance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 1 W.This is achieved through the use of 60 m2 MOSFETs and an optimized gate driver scheme that achievessignificantly lower idle losses than typical discrete implementations.Professional wireless amp with subwoofer frequency, SUB volume, master volume/bass/treble control. No popsound. no audible noise during the cornection, Have a good time with Hifi music iourneyWhat You Get: BT30D Pro Amp xl, power supply xl, user manual xl.