Product: Nobsound Little Bear T7 Vacumn Tube Mini Phono Stage RIAA MM Turntable Preamp & HiFi Tube Pre-Amplifier (Silver)
Brand: Little Bear
Color: Silver
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. 

This product can be used as a MM Turntable Preamp or a HiFi Tube Pre-Amplifier and can provide high fidelity and warm sound beyond your expectation.
Please do not connect T7 to any inferior Bluetooth digital amplifiers except Class T digital amplifiers, since all Class D amplifiers have very loud background noise.
Its tube(6J1) can be directly replaced with tubes like 5654, 6AK5, EF95 .etc
Its mini size makes it more portable and be suited for a variety of scenarios and Its alluminum body makes it strong and elegant.
Upgrades of the new version: ① The gain switch is moved from inside to outside. Customers can adjust its gain more conveniently; ② The circuit is optimized and the noise is lower.

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