Features: Z-97 550W highly power subwoofer frequency divider for audiophiles home speaker, separates bass for your entertainment activity and delivers strong sound. It can divides the total frequency signal from the amplifiers, block signal above medium and low frequency from passing through, and allow bass, subwoofer, and subwoofer to get past. The materials are sufficient, and the inductors adopts a 1.5 wire diameter large inductors, specific large capacitors, and a highly power highly frequency ceramical insert pin resistors. Printed Circuit Board fire proof board with thick coppered base plate, add two (four level in total) adjust switches in the circuit to flexibly adjust the bass to achieve the most suitable effect. Reasonable design, fine workmanship, and solderless terminals make DIY more convenient. Specifications: Material: ABS+Metal Size: about 188x118x67mm/7.40x4.64x2.63inch Model: Z-97 Applicable power: 550W Applicable impedance: 4~16Ω Frequency response: 43Hz/45Hz Applicable speaker: 6.5-15inch (heavy) bass speaker Package Includes: 1x 550W Frequency Divider note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.