2 X Operational OP-Amp Audio Pre-amplifier Module NE5532 Preamp Description: New and high quality 5 times preamplifier This audio preamplifier board uses the original imported OP amplifier chip, which is of cleaner than other similar PO devices AMPSSmaller Overlays the floor This audio preamplifier board which belongs to the audio preamplifier, directly connected to the speaker is not audioT need to connect the amplifier to the audio output, the power will be connected to the speaker to get the sound Connect DC 12 -30V power supply to the OP AMP board power input terminal, pay attention to the distinction between positive and negative poles, and VCC is the positive pole Board layout is reasonable, low noise, nice component layout, the maximum to meet the critical eye Specification: Product Name: Preamp Board Supply voltage: DC 12-30V Magnification: 5 times Chip model: NE5532 Number of Channels: 2CH Working temperature: -20-85 Operating Humidity: 5%-95%RH Module size: 50 x 30 x 16mm / 1.97 x 1.18 x 0.63 inch The package includes: 2 x NE5532 Preamp Module