Features High Quality Material: The volume control board adopts 1.6mm thick double-sided board, 1.5oz copper thickness, and full tin-plating process to ensure good passing performance of large and small currents. High Precision: Adopt high precision, low temperature floating circular audio resistor, better low noise design, bring you more convenience, efficiency and convenience. Applicable: Adjustable voltage, high precision, suitable for heating ceramic seal and gold seal op amps. Low power grid clutter interference, stable and reliable performance. Stable Performance: Enhanced audio sound field, dynamics and greater width, it is recommended to use with active preamplifier. The input is connected directly to the audio source and the output is connected to the amplifier. It has the characteristics of wide frequency band, low noise and convenient use. High Conversion Rate: The input is directly connected to the audio source, and the output is connected to the power amplifier. The chip has high conversion rate and strong driving ability, which is of great help to your project. Specification: Item Type: Volume Control Board Material: PCB Model: 2604 AD827 Supply Voltage Dual AC 12-18V Potentiometer Spacing: 24mm Package List: 4 x Fastening Screws 2 x Chips 6 x Cable Ties 3 x Connectors 1 x Wire 2 x Heat Shrinkable Tube 1 x Volume Control Board Package List 4 x Fastening Screws 2 x Chips 6 x Cable Ties 2 x Connectors 1 x Wire 1 x Heat Shrinkable Tube 1 x Volume Control Board