Reference Audio-Technica HA5000 line ear amplifier - field-effect tube Class A ear amplifier

Description:

Note, because the output field-effect tube K2955, J554 discontinued, we can only choose the original board dismantled tubes, are tested and good to use.

Circuit from the original machine super 1W yuan Audio-Technica's flagship ear amplifier HA5000, HA5000 original machine diagram, quoted from the Internet reference. Different from the general Lyman, Beyer A1 and other simple type op amp plus BUF ear amplifier, the music taste is clearly superior, the human voice sweet and full, delicate, elastic, drive power is not the general ear amplifier comparable, and even can drive small passive speakers. If you have done Lyman, TPA6120, Beyer A1 and other high imitation circuit is not satisfied, this circuit is well worth a try, debugging is also very simple.

The main filter for the British NOVER6800UF headphone socket for the Swiss Neutrick gold-plated relay for the Japanese Omron.

PCB size: 130X106MM headphone seat and potentiometer center distance is 45MM

PCB double-sided gold plating process, the board does not contain the potentiometer, the buyer needs to purchase their own separate.

Red switch is to control the gain, set the amplification, can meet the needs of high and low impedance headphones

4 high-power field-effect tube output, even K701 this category of headphones are easy to drive

HA5000 core module, the use of electronic tube characteristics of the field-effect tube input, high input impedance, very good detail performance

Package:

1pc Reference Audio-Technica HA5000 line ear amplifier - field-effect tube Class A ear amplifier