Little Bear T7 Vacumn Tube Mini Phono Stage RIAA MM Turntable Preamp HiFi Tube PreAmplifier Black

Notice: As a phono preamp, it is suited for MM turntables only. Do not support MC turntables. As an AUX preamp, it is suited for devices like CD, DAC, PC, cellphone. Please note as a phono preamp, it can only work with MM turntables. Please note your turntable should have no built-in phono preamp. If it has, please make sure there is a PHONO OUT/LINE OUT switch and you should put it on PHONO OUT position. We do not recommend using it with class D amplifiers since most class D amplifiers have much noise. Parameters: 1. RIAA phono part: RIAA freq response 20hz-20kHz +/- 0.5dB, S / N ratio> 85dB THD <0.05%, input sensitivity 3.0mV, gain 40dB Nominal / max output 300mV / 1.8V Output impedance 200 ohms, input 47k ohm / 220 pF 2. AUX part: Input voltage: AC12 ~ 18V Frequency response: 20 HZ - 20 KHZ Input sensitivity 300 mv SNR: 96 db Total harmonic distortion <3% (1 KHZ) Power range output: 0.2 W Output impedance: 100K Input impedance: 50K Chassis size: 80×116×28mm Net weight: 0.24Kg (0.55Kg with package) Package includes: 1 x preamplifier 1 x power supply 2 x 6J1 tubes What's more: It will be better if its GND jack can be really connected to the ground, which can decrease the background noise to a very low level. For MM turntables, please check whether your MM cartridge is the old version. If so. we suggest you to upgrade it as a new version one will bring much better sound. Please keep T7 away from devices that can transfer signal like cellphones and routers.