SUB-1S Subwoofer Low Pass Active Filter 
Electronic Crossover DIY KIT For Active Subwoofer
Easy for DIY
Very Small Size PCB
2 Order Option:
1. PCB with components Assembled Ready to Use
2. DIY KIT You need to Place and solder all the components
High quality Product and reliability FR4 1.6MM PCB
Stereo Input To Mono Output
Working Voltage : Single 12-24Vdc
Current Consumption: 8mA
Frequency Control : 
Low Pass adjustable 50-250Hz 12db
PCB Size: 45mm*36mm double-sided HAL,FR4 1.6MM
Potentiometer Gap: 25mm (Center to Center)