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While audio is life , the Power supply is water , Pure water create the wonderful life ... ...

Regenerative Power Supply
Real Balanced ACSS design 
Preamp & Headphone amp


Summarize Use Manual Specs Shipping Cost

Some advices for the unit have the life longer than 100,000 hours :
          1, The HE-9 had built in full analog regenerative power supply, full class A power supplies and signal amps, these designs will produce 25 centigrade higher than the room temperature , we are advice shut down the unit for more than 2 hours after continuously working 10 hours  . The unit only need around 15 minutes for warm up.
          2, Keep its top
cover , side faces  had least 3 CM space and far  to other heat gears for better heat follow away .
          3, Let it working in the room temperature lower than 30 centigrade . For better sound reproduce, we had applied the R core transformer but the power Consumption is large, so if the power supply over 235V or 125V may cause the transformers had hum.

The unit applied input short design :
         The unit  had design the analog idle input short circuit for avoid the disturb between different sources.
         This design also applied in a lot high end
brand devices.
         The working theory : 
Without the idle input short circuit ,if the input 5 and input 4 had connect two extra DACs,  while users select the either input 5 and input 4 , the another input signal will fire through the circuits and mix  into the using signal, even though this signal is  weak  but still can degrade on the sound quality.
          With the idle input short circuit function : if user select either the input 5 and input 4, the another input signal will short circuit then no any signal fire through circuits , can keep the sound quality had not degrade.

          In world there are more than 99% DACs and the sources had allow the outputs short , if your DAC decalre can't short the output , please custom order the Master 9 .


HP/PRE switch :
          Select the HE-9 output model  , display "H" mean for headphone output, display " P" mean for preamp output.

Gain switch :  
          Below cases may select the high gain mode (The gain modes do not available for the ACSS input ):
          1, The source output level <1.25V RMS (RCA) or <2.5V RMS (XLR) .
          2, The headphone have very low sensitivity .

Selector switch :
          Select the HE-9 inputs from IN 1 to IN 5.

Volume knob :
          Select the HE-9 volume control .

Please note :
        Before shipping we had multi-ply check the gear have the perfect state of the outside . 
        Few countries customs workers is rude maybe scrape the chassis or volume knob while custom check , if the scrape have not effect the performance , customers can pay the shipping cost for ask we send the free parts for replacement .
        If the volume switch broken during rude custom check , there is a spare volume switch in the pack for customers replace by themselves , this is had not soldering necessary .
        In our experiences , scrape chassis or shatter the volume switch is very infrequent ( In case less than 1%).


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