DC 12V Power Adapter & Dual Gain: The phono amplifier comes with a DC 12V power adapter, so it is no longer limited to application scenarios. Considering that the phonograph signal is relatively weak, the PP500 adds a set of gain adjustment at the input and output to ensure that the volume can be played perfectly. Low Noise Operation: The operational amplifier with PP400 low noise turntable amplifier offers excellent performance. The output is 2V (PP) at a maximum of 10K ohms. It is best to place the preamp close to the source to reduce unwanted noise and interference. High Sensitivity: The phono turntable preamp can convert the sound signal into line level signal, this sound preamp of advanced circuit, input sensitivity electromagnetic pickup. Independent knob control operation, more convenient to use. Connect to Phono Turntable: The phonograph amplifier connects any turntable to modern audio equipment without the need for a dedicated phono input to amplify your music. For the receiver, it can be connected to a speaker, computer, laptop, etc. Plug and Play: This mini preamp with stereo RCA inputs and stereo RCA outputs, easily connect the turntable to the RCA inputs and ground. Then also connect the amplifier receiver to the RCA output. Plug and play, convenient to use.