Description: Brand new and high quality 5 times the board preamp. This audio preamplifier board uses the original imported op amp chip, which is purer than other similar op amps.Smaller noise floor.It is suitable for a wide range of preamplifier amplification of all audio amplifiersIt has a wide voltage input DC12-30V. This audio preamplifier board, which belongs to the audio preamp, directly connected to the speaker is not sound.It needs to connect the amplifier to the audio output, the power will be connected to the speaker to have a sound.It connect the DC 12-30V power supply to the power input terminal of the op amp board, pay attention to distinguish between positive and negative poles, and VCC is positive pole. Board layout is reasonable, low noise, component layout nice, maximum to meet your critical eye. Specification: Product Name: Preamplifier board Supply voltage: DC 12-30V Magnification: 5 times Chip model: NE5532 Number of channels: 2CH Operating Temperature: -20℃-85℃ Operating Humidity: 5%-95%RH Module Size: 50x30x16mm/1.97x1.18x0.63inch Package Includes: 10 x NE5532 Preamplifier Module Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.