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Details：

Work voltage：AC115V and AC230V optional Front color:silver Tube model:RU EH 12AX7 x4pcs Switch LED color：blue Size: 360x92x308mm （Except RCA） Input impedance： 47K Gain: 48DB@1KHZ Distortion: 0.05% @1khz This tube Phono Amplifier is base the famous UK EAR834 Circuit. the sound is very good. Note: this is only a MM Phono Amplifier. can not connect with MC Phono. also can not be used as a Ordinary preamp to use it.

High voltage power supply:

Two-stage step-down voltage stabilization filter, power supply low-pass filter cutoff FC=1.6Hz, providing more pure power supply (close to battery level); The high-voltage power supply regulator tube uses N-MOS, which has a certain bile taste and there will be noise of tube rectification and voltage regulation; With high-voltage power supply soft-start function, reach the design voltage value in about 3 seconds, without voltage shock, protect the tube;

Filament power supply:

DC filament power supply, with filament voltage soft-start function, reaching the design voltage of 12.6V in about 5 seconds, protecting the filament and prolonging the life of the tube;

Amplifier circuit:

The input stage is in parallel, and the current parameters are newly set according to the needs of sound calibration; The input stage parallel tube can enhance the sense of detail, and at the same time add a tube to solve the problem of dual-channel shared tube; Independent electronic tubes for left and right channels, avoiding dual channel co-pipes, further improving separation and reducing crosstalk; Mirror filament pins, replace and insert the tube every six months or so, to reduce magnetization and further extend the life of the tube;

Materials:

The entire line of coupling capacitors uses licensed German-Mondolfo MCAP-EVO series capacitors. The main filter capacitor uses a licensed German-Mondolfo 450V-220uF high-voltage electrolytic capacitor Use BC hydrolyzed blue electrolytic capacitors for high voltage decoupling Level A PCB Custom all-copper R-type transformer Full aluminum chassis Stainless steel switch

Package included：

Finished EAR834 MM phono amplifier x 1 Not included AC power cord