Function: 1. Control range: 7-band equalization circuit adjustment range ±12dB, equalization band: 60HZ, 150HZ, 400HZ, 1KHZ, 3KHZ, 6.5KHZ, 15KHZ, by the original lineup TL074 TI or ST. 2. Basic parameters: 7-band equalizer preamp gain, classic 4580 op-amp provides 5 times gain (14dB); input impedance 20K, output impedance 600 ohms. 3. Compatible with headphones: in-ear amplifier with sound equalizer, NE5532 part consisting of 47 type headphone driver circuit, easy to drive all types of headphones, adjustable high and low. 4. 5. Aluminum alloy: The car 7 band equalizer is made of aluminum alloy, high strength, corrosion resistance, stable performance, DC5V-12V power supply, two-channel sound. Specification: Item Type: 7 Band Equalizer Material: aluminum alloy Power Supply: DC5V-12V Interface specification: 5.5x2.1 Input impedance: 20K Output impedance: 600 ohms Equalizing circuit adjustment range: ±12dB Equalization frequency band: 60HZ, 150HZ, 400HZ, 1KHZ, 3KHZ, 6.5KHZ, 15KHZ Package List: 1 x 7-band equalizer 1 x power cable Remove the product and use it