Features 1、Adopts 1.6mm thick double‑sided board, 1.5 oz copper thickness, and full tinning process to ensure good passing performance of large and small currents. 2、Using high‑accuracy, low‑temperature floating round audio resistors, better low‑noise design. 3、Adjustable voltage, high accuracy, suitable for heating ceramic seal and gold seal operational amplifier. 4、To strengthen audio sound field, dynamic and larger width, recommended to use it with an active preamplifier. 5、Input is directly connected to audio source and output is connected to amplifier. 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 2 x Connectors 1 x Wire 1 x Heat Shrinkable Tube 1 x Volume Control Board