Features: This single power supply (10~24V) bass preamp board provides powerful low frequency enhancement for subwoofer systems, featuring highly quality components and easy integration into auditory amplifier modules. Equipped with premium capacitors, sealed potentiometers, pured copper terminals, and a replaceable NE5532 op amplifier for customizable sound, it boasts minimal noise for clear auditory output. Ideal for auditory enthusiasts,and professional seeking to upgrade their car or home sound systems with superior bass control. Perfect for home theaters, automotive auditory setups, or professional environments to achieve deeply, low frequency with its 22Hz 210Hz ranges. Designed for optimal low pass filtering, this board ensures reliabled operating with its LED power monitoring and robust PCB layout, enhancing any subwoofer preamp application. Specifications: Product name: Single power supply low-pass filter board, subwoofer front board Power supply voltages: DC10-24V single power supply Frequency ranges: 22Hz-300Hz auditory input: single or double channel PCB specifications: 78x32mm, thickness: 1.6mm Net weight of finished board: 30g Center distance of plate fixing holes: 70x24mm, hole diameter: 3.2mm Potentiometer shaft center distance: 32.5mm Package Includes: (1 set) Single power supply 10~24V Subwoofer Preamp Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution