The HE series products had the longest term of design and test  in audio-gd history .  Even though audio-gd had release the regenerative power supply products since 2006, and Mr. Kingwa had publish the article in the <Radio & TV> magazine explain the technology detail .
        The HE series products had finished the design in the New Year of 2014 , we were plan to release them in the date of audio-gd 10  anniversary , but for got the best sound quality and performance, we have even 3 times change the full design for made the compare, and compare different power frequency and voltage, create the longest design term record.
       The HE series products have better detail and dynamic reproduce ,blacker backstage ,better focus and larger sound stage , but the sound is better analog .
       The right saddle must is set on the right horse ,if you had not enough good system units, and had not enough cable match experiences, don't waste the money on HE series products.
      Please note the HE series products are upgrade from Master series, even though the price had a big rate increased but the sound quality had not same rate improved.

Audio-gd products had design and test based on the AP SYS-2722 (The top-drawer professional equipment in world)


Built in regenerative power supply
Separate class A PSUs power supply for regenerative drivers and audio signal amps .
Uses 6 unit transformers (In total 2400W ) and more than 280,000uf audio grade capacitors are used to ensure ample and smooth power delivery.
Fully balanced class A Non- feedback ACSS analog design built by discrete analog stages without any OPA or coupling caps in the signal path.
Full new ultra low distortion output stages design, Applies 80 pieces of ON Semiconductor “the King of transistors” MJL4281/4302.
2 analog inputs:   XLR / ACSS