YJ-Fever Grade HIFI Bile Preamplifier 6J1 Tube High And Low Bass Adjustment Bluetooth 4.2 Audio Amplifier Preamplifier

Features Use original 6J1 tubeThe main filter capacitor adopts the original imported 1000UF 25V and the coupling capacitor adopts imported for Philips capacitor 1UFThe resistance uses five ring 1 metal resistance to ensure a good signal to noise ratio of the whole machine PCB adopts a 1 6mm thick double sided board 2 0 oz copper thickness and a full tinning process to ensure the good passing performance of large and small currents First class PCB quality The input and output use gold plated RCA lotus seat durable and beautiful This board has reasonable wiring a beautiful appearance and low current noisePower supply DC12V2A direct current Net weight 0 4KGSize length 137 width 104 height 41MM excluding tube height Tips 1 This finished machine is a pre amplifier not a power amplifier it should be used with a post amp or active speaker Do not directly connect passive speakers speakers or earphones as power amplifiers they cannot be used in cars because the car s voltage is unstable and will burn 2 In general poor audio cables or power supply filters have a very high probability of causing noise at the bottom It is recommended to use a good audio cable or power supply 3 Make sure that there is no problem with your sound source The preamplifier itself has a preamplifier function If the sound source itself is noisy the preamplifier will only amplify the noise Please use a good sound source to test 4 Check whether the electron tube is properly inserted i