product description
In 2018, I began to listen to Diy's EAR834 phono amplifier. After a few years, the 834's atmosphere, balance, and dynamic dynamics are convincing; but it also has shortcomings, which are also inherent design problems. It is unavoidable that the channels share at least one tube, and the separation of the two channels becomes the biggest bug; if you like this kind of sound and have the ability to eliminate the bug, then make a big change; deep magic change – EAR834C is a more general imitation Comparison of original or replica EAR834 works, with the following differences (features)
High-voltage power supply: two-stage step-down voltage regulator filter, power low-pass filter cut-off FC=1.6Hz, provide a purer power supply (close to battery level); high-voltage power supply regulator uses N-MOS, which has a certain odor but will appear The noise of the rectifier and voltage regulator; it has the function of soft start of the high voltage power supply, which can reach the design voltage value in about 3 seconds, without voltage shock, and protect the electronic tube;
Filament power supply: DC filament power supply, with filament voltage soft start function, about 5 seconds to reach the design voltage 12.6V, protect the filament and prolong the life of the tube;
Core amplifier circuit:
The input stages are connected in parallel, and the current parameters are newly set according to the needs of sound calibration;
The parallel input stage can enhance the sense of detail, and at the same time add an electronic tube to solve the problem of two-channel sharing electronic tubes;
Independent tubes for left and right channels, avoid dual channel co-management, further improve separation and reduce crosstalk;
Mirror the filament pin position, replace the tube every six months or so, reduce the magnetization phenomenon, and further prolong 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 the licensed German-Mondolfo 450V-220uF high-voltage electrolytic capacitor.
High voltage decoupling uses BC hydrolyzed blue electrolytic capacitors.
Class A PCB.
Custom grade 50VA all copper R-type transformer.
without chassis and RCA protruding size
Only silver panel
Detailed parameters
Input Impedance: 47K
Gain: 48DB@1KHZ
Distortion: 0.05% @1khz
Product Size
Size: 360x92x308mm
Matters needing attention
Note: Does not include any power input cables
The list of goods
Without tube version: EAR834-C phono amplifier complete machine X1
EH 12AX7 Version: EAR834-C Phono Amplifier X1 (including 4Pcs EH 12AX7)
PSVANE ECC83 Version:EAR834-C Phono Amplifier X1 (including 4Pcs PSVANE ECC83)
Reviews
There are no reviews yet.