Feature:1. Onboard bass frequency regulator potentiometer can make a relatively wide adjustment, so that subwoofer can be blend in the mid\u2011to\u2011treble harmoniously without a sense of violation\n2. Dual 5532 2.0 full\u2011tone + 0.1 bass structure can control the volume of each channel of 2.0+0.1, adjustable bass frequency phase with powerful bass\n3. Both full frequency and bass output signals have independent interfaces, which is very convenient\n4. Support both DC 12\u201130V and AC 9\u201120V input voltage, powerful and practical\n5. Made of high quality material with fine workmanship to guarantee a stable performance\n\nSpecification:\n\nItem Type: Preamp board\nChip Model: NE553278M12\nInput Voltage: DC 12-30V / AC 9-20V\nArchitecture: Dual 5532 2.0 full tone + 0.1 bass\nFrequency Range: Full tone 20-20KHz / bass 20-200Hz\nFeatures: 2.0+0.1 controllable volume, adjustable bass frequency and phase\n\nPackage List:1 x Preamp Board\n\n--\n\nBitte beachten Sie dabei, dass wi: