XiangSheng "728A" Stereo Pre-Amplifier - 2011 Upgraded Version
 Strong Driving Power, Vivid Sound, High Resolution, Accurate Locating - Item code : XS-728A-SV

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  Pre Amplifier
 Xiang Sheng "728A"
  Class A Operation

Size Dimension 

 W430mm H90mm D290mm


 Silver Body


 8.5 kg

Packing Includes 

 All the Tubes/Valve  & Standard 1.5m Power Cord

Each Price: 

 USD 373 "Shipping free"
 Individual Order  "Worldwide Shipping By Air Mail"

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Please note that color of Upgraded Version is different from the former one.

Supply Voltage 

 AC100V-AC240V available 60Hz/50Hz

Output Tube


Input Impedance 






Output Impedance

 600 ohm

Signal/Noise Ratio 



 less than 0.01%

Input Jack 

 4 groups

Output Jack

 2 groups


 Working environment: Temperature:5℃—40℃

Product Gallery

Brings sweet sound from angel to the world belongs to yourself

U want to enjoy music and have a peace of mind ? Or Christina Aguilera whispers next to your ears?......here's your wise choice.

The pre-amplifier improved based on famous Wada Shigeho's Style Electric circuit,

which was Introduced by Wada Shigeho in the early 1960s and gave an excellent performance.

Regarding the Wada Shigeho's Style Electric circuit,

it not only still keep the good features of Marantz7,

meanwhile it have superrior features in Dynamic,

High/lLow Frequency Response, Resolution and Signal to Noise Ratio as compared to Marantz7.

But apart from above features, it’s also not inferior to Marantz7 in Sound stage and airy feeling.

Adopt 4pcs paper in oil capacitors and German WIMA capacitors for coupling effect,

 make the sound warm and delicate.

Powerful, Dynamic With Sweet  TUBE SOUND On Your Headphone !

Nice headphone must use a high Quality Amplifier!

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