Woopker Audio Amplifier 45Wx2 Channel 2.0 Digital For Home Car Powerful Bluetooth Hifi Stereo Subwoof AMP Support USB TF

Feature: - Portable HIFI Digital Bluetooth and AUX Audio Power Amplifier. - Support TF Card, U-Disk, AUX, MP3 play and BT Connection. - With Treble, Bass, and Volume control, Very easy to use. - Low distortion supplies clearer, stronger and more powerful sound. - With Remote control, Easy to adjust volume. Channel 2.0 output. - Support DC/AC power in, Suitable for Home and Car. - Support FM Radio But not professional, pls understand. Specification: Type: Digital HIFI Power Amplifier Support: Bluetooth/SD/TF/USB/AUX/RCA Input Function: Power AMP/Music Player/FM Radio AUX Input: 3.5mm Audio at front RCA Input: PC /MP3 /DVD /CD etc at rear Audio output: L/R 2.0 Channel Bluetooth Version: 5.0 USB Version: 2.0 Output Parameter: Max Power: 45W+45W RMS Rated Power: 15W+15W Rated Impedance: 4-8Ω Distortion: 0.02% S/N Rate: 92db Power Supply: DC 12V >=3A / AC 110V/220V Remote Power: 1x CR2025 BatteryNot Included ! How to match the AMP and Speaker: 1. The impedance of the amplifier is the same as the speaker, can not be too far apart. 2. The power of the amplifier is 1.5 times than speaker to obtain a enough sense of strength. => If the output impedance of the amplifier requires 4-8Ω, the impedance of your speaker should also be 4~8Ω, the sound of 4 ohms is louder, and the 8 ohms is smaller; => If the output power of the amplifier is 35W, the speaker should be around 20W. For the 1.0 channel, the speaker power is 20-30W, for the 2.0 channel, it is 2x20-30W. => If the amplifier is full frequency, the wider the frequency response of the speaker, the better, such as 100~18KHZ. TIPS: ● The speakers must be based on impedance and power, regardless of dimensions. ● If the sound is intermittent or hoarse during increasing the volume, it means the speaker and amplifier are not matched, Pls use small sound or change a suitable speaker. ● Pls make sure that the required power supply is used and working properly. NOTE: 1. If you want to use the DC Power, Pls buy the power adapter by yourself. 2. Do not create a folder in the U-disk or TF-card, but directly put the MP3 file in it. Package Included: 1 x Audio Amplifier 1 x Remote Battery NOT included!