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【Compatible with Headphones】This sound equalizer ear amplifier is part of the NE5532 and consists of a type 47 headphone driver circuit that easily powers all types of headphones and is adjustable in height and depth. Aluminum Alloy The 7-band car sound equalizer is made of aluminum alloy, high strength, stable performance, DC5V-12V power supply, dual channel sound. Control range: 7-band equalization circuit control range ± 12 dB, Equalization band: 60 Hz, 150 Hz, 400 Hz, 1 kHz, 3 kHz, 6.5 kHz, 15 kHz, by TI or ST original composition TL074. Basic Parameters 7-band sound equalizer preamp, 4580 classic op amp provides 5x gain (14dB); Input impedance 20K, output impedance 600ohm. 3.5mm Interface The 3.5mm input interface supports 4 pin plugs, the output is connected to the headset with a microphone, which can be used on mobile phones for normal voice calls, and another terminal with a group interface is available.; Product description Specification: Item Type:7 Band Sound Equalizer Material: aluminium alloy. Power supply: DC5V-12V. Interface specification: 5.5 x 2.1 Input Impedance: 20K Output impedance: 600 ohms. Control range of the balance circuit: ±12 dB. Equalization frequency band: 60 Hz, 150 Hz, 400 Hz, 1 kHz, 3 kHz, 6.5 kHz, 15 kHz Package list: 1 x 7-band sound equalizer. 1 x power supply cable. See more; Product description Specification: Item Type:7 Band Sound Equalizer Material: aluminium alloy. Power supply: DC5V-12V. Interface specification: 5.5 x 2.1 Input Impedance: 20K Output impedance: 600 ohms. Control range of the balance circuit: ±12 dB. Equalization frequency band: 60 Hz, 150 Hz, 400 Hz, 1 kHz, 3 kHz, 6.5 kHz, 15 kHz Package list: 1 x 7-band sound equalizer. 1 x power supply cable. See more; Specification: Item Type:7 Band Sound Equalizer Material: aluminium alloy. Power supply: DC5V-12V. Interface specification: 5.5 x 2.1 Input Impedance: 20K Output impedance: 600 ohms. Control range of the balance circuit: ±12 dB. Equalization frequency band: 60 Hz, 150 Hz, 400 Hz, 1 kHz, 3 kHz, 6.5 kHz, 15 kHz Package list: 1 x 7-band sound equalizer. 1 x power supply cable. See more; Specification: Item Type:7 Band Sound Equalizer Material: aluminium alloy. Power supply: DC5V-12V. Interface specification: 5.5 x 2.1 Input Impedance: 20K Output impedance: 600 ohms. Control range of the balance circuit: ±12 dB. Equalization frequency band: 60 Hz, 150 Hz, 400 Hz, 1 kHz, 3 kHz, 6.5 kHz, 15 kHz Package list: 1 x 7-band sound equalizer. 1 x power supply cable.; See more