Operating Voltage:AC12V 0.8A or above Power Interface:5.5*2.5plug PCB Size:77*75*57mm Instructions: AC 12V IN:Apply with 5.5*2.1plug,with AC 12V transformer.If you want to use no plug AC 12V transformer,you need to soldering the cable on the board. Note:Do not use DC power in,otherwise the item will not work. Audio Input:Can connect the mobile.computer,MP3 and music player etc. Audio Output:Can connect with the amplifier board etc.
Package Included: 1set preamplifier board with tubes with shell 1pcs preamplifier board with tubes 1pcs acrylic shell