Fix Firmly: The screw is firmly fixed, not easy to be slippery, the thread is deep, and the force is uniform, so you can use it with confidence. MULTIPLE USAGES: Audio Preamplifier can drive most home passive speakers, passive or active subwoofers, bass and treble controls ensure good music quality 3.5MM INTERFACE How to Use: No need to install special software, applications or drivers, just plug and play. Douk Audio Vacuum Tube Preamp: Headphone Amp with VU Puerto Rico Plug And Play Preamp Stereo Music Signal Preamplifier 2 In 2 Out Audio Mix Car Audio Preamp Stainless Steel Material: The threaded insert is made of stainless steel and has the functions of wear resistance, rust resistance, corrosion resistance. Stereo Audio Amplifier, DC 12V Stereo Music Signal Preamp, 2 Inputs and 2 Outputs, Mix Distribution Splitter with 3.5MM Component Amplifier High Hardness: The hardness of the metal thread insert is high, it will not be deformed after long term use, and it is safe. Burr Free: The stainless steel thread insert thread is exquisite in workmanship, burr free, clean and tidy, and easy to install and remove.
