Preamp Module Preamplifier 3 Channel NE5532 Adjustable Treble Midrange Bass Outp

Feature: \n 1. NE5532P Chip: Other op amp chip such as OPA2604AP OP275G TL072, etc. can also be replaced, very simple and practical.\n2. Board Structure: 3 channel output, treble, bass, midrange, which ensures good sound quality and more audio enjoyment.\n3. Crossover Point: 500HZ, 5kHZ, that is, 20HZ\u2011500HZ is bass output, 500HZ\u20115KHZ is midrange output, 5KHZ\u201120KHZ is treble output.\n4. Filter Type: Subtractive divider, also comes with \u201124dB/Oct attenuation slope, so the preamp module has high efficiency.\n5. Easy to Install: Designed to have a light weight and a compact size as well, the installation is very convenient. \n\nSpecification: \n\nItem Type: Preamp Module\nModel: NE5532\nMaterial: PCBA\nAttenuation Slope: -24dB/Oct\nProduct Size: Approx. 98 x 84 x 20mm / 3.86 x 3.31 x 0.79in\nPower: DC positive and negative, dual 9-15V. \n\nPackage List: \n 1 x Preamp Module \n\nNote: \n The 10k resistor in the picture above cannot be changed. The R calculated by :