HiFi Mini Class A 12AU7 Tube Multi-Mix Headphone Amplifier Stereo Pre-Amp Board DC24V

Features It is a Pure Class A amplifier with excellent performance desgined by Douk Audio Studio It brings you a powerful dynamic and sweet TUBE SOUND from your headphones Without any OP amp or IC in this circuit but MOSFET Class A The vacuum tube will emit red light in operation offering you different visual effects especially at night and its mini size compact design and tough PCB shell make it more elegant and fashionable 6 35mm and 3 5mm headphone output can be used at the same time In addition it has output mute protection which can protect your favorite headsets It also can be used as a class A preamplifier with its preamp output interface High Playability with a switch that can set it to 12 series or 6 series tube modules 6 Series Available 6DJ8 6922 6N11 E88CC 6H23 12 Series Available 12AU7 ECC8 5814 6189 B329 CV4003 ECC802S Specifications Working voltage DC24V 1 5A at leastInput sensitivity 50mVGain 32dBAudio input 3 5mm audio jackStereo L R RCAAudio output 3 5mm headphone6 35mm headphoneStereo L R RCAInput Impedance 100KΩOutput Impedance 20Ω 600ΩFrequency response 10Hz 60KHz ±0 25dB Signal Noise Ratio 90dBDimension W102 D102 H37 5 mm 4 02 4 02 1 48 in Net Weight 310gNotice 1 We recommend to have it rest after 2 3 hours work for its large power that not suitable for a long time work 2 Please keep away from some high power sources of interference such as monitors audio speakers mobile phones WIFI and other elec