Treble, Midrange, And Bass Tone Controls Are On The Volume Control Board Hifi Product Details Specification: Item Type: Tone Board Chip Model: 2 x NE5532, 7812, 7912 Input Voltage: AC dual 12V-18V. Structure: Dual 5532 high, middle and low, 3 sections continuously adjustable. Frequency Range: 20-20KHz Features: DC12V output, input and output 2 kinds of interfaces. Input Interface: Approx. 2.54mm / 0.1in interface, 5.08mm / 0.2in terminal. Output Interface: Approx. 2.54mm / 0.1in interface, 5.08mm / 0.2in terminal. Adjustment Type: Treble + Midrange + Bass + Total Volume Appearance Size: Approx. 100 x 43.5 x 23mm / 3.94 x 1.71 x 0.91in Mounting Hole: M3 (Diameter: Approx. 3.3mm / 0.13in) Package List: 1 x Tone Board 8 x Accessory Note: Compatible with 2.54mm and 5.08mm connectors. When using, only select one interface to input or output. Smart Design - Equipped with dual NE5532 chip, the pre amplifier module works with good stability and high efficiency. The chip has high conversion rate and strong drive ability, which will greatly help your project. Simple Using - Compatible with 2.54mm and 5.08mm connectors, the output is DC12V, and frequency range is 20?20KHz. Small clutter interference of power grid, stable and reliable performance. Preamp Board - This preamp board can adjust the input audio signal, and then send it to the power amplifier board. Wide frequency band and small noise, easy to use. Good Control - Enables continuously adjustment on treble, mediant, bass and volume, very simple to adjust as well. Structure: Dual 5532 high, middle and low, 3 sections continuously adjustable. Easy to Install - Comes with M3 installation hole, the convenient installation can be quickly finished in minutes. Input Interface: Approx. 2.54mm / 0.1in interface, 5.08mm / 0.2in terminal. Output Interface: Approx. 2.54mm / 0.1in interface, 5.08mm / 0.2in terminal. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.