Balanced A3  Version 2   Full Balanced Tube Line Preamplifier 

Retired Product

The BALANCED A3 Version2 is Audio Experience level 3 full balanced line preamp with Remote Control . it use new design Class A, + wave auto-balance circuitry offers wonderfully realistic, dynamic, open-sounding music that will please the ears and stir the soul of even the most discerning listener. The gain stage of the main circuit is a fully balanced design, each channel using Three E88CC/6922 vacuum tube to form zero negative feedback (0 NFB). The A3 line stage employs specialized tubes to project a clean, fresh soundstage while effectively preventing RF and vibration interference. The low impedance output stage is defining yet truthful to each note.


The Balanced A3’s application of a highly efficient solid-state regulator in the HVB+ power supply produces a sonic quality that is completely stable, lively, and rhythmically true to its source. At the heart is an extremely quiet power supply comprised of a fast, large current, R-core transformer. The shortest possible cable connections inside are the signature of the Mr. Chui ’s master craftsmanship.


The Balanced A3 replace the old model Balanced A2, Balanced A2 plus , Balanced A2 SE, Balanced A2 gold and Symphonies Plus-DX .



 a3v2in.jpg (834436 個位元組) Auricap XO output caps

a3fvdb.jpg (651331 個位元組)  Frequency Response at 2V output.

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Review by HiFi review #401

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Controls : L Gain , R Gain , Main Volume , Input Selector , Power On/Of

Remote Control : input select , volume control , mute 

Output :  Two Main with XLR / RCA , One Record with XLR / RCA ,

Input : L1 , L2 , L3 , L4 with XLR / RCA , Processor with XLR / RCA ( HT/BP )

Output Impedance :  500 ohms Balanced , 250 ohm SE Main.
Recommended load:  10K ohm or greater ( Balanced ) , 5K ohm or greater ( SE ). 

Frequency Response:  10Hz ~ 200KHz ( 10Hz -0.2dB, 200KHz - 1.5dB)

T.H.D : <0.1% (20Hz ~ 20KHz /2V)

Input Impedance: 50K ohm XLR

Gain (Gain and Volume controls at MAX) :
20dB at XLR input to XLR output.   20dB at RCA input to XLR output.
15.5dB at XLR input to RCA output.   14.5dB at RCA input to RCA output.

S/N: >100dB

Channel Balance: <0.2dB(20Hz ~ 20KHz /max output)

Channel Separation: >92dB(2Hz ~ 20KHz)

Phase Mode : Normal

Max Output : 28V

Line-Stage Tubes : 6pcs E88CC/6922

Dimension: 455mm x 350mm x 120mm (W x D x H)

Weight: 7kg

Power Source: 110-127/220-240V,50/60Hz

Actual price : HK$9680.

Retired Product


Room1308, 13/F,BLK C,.  
Kai Tak FTY BLDG.   
99-101 King Fuk ST,.   
San Po Kong,   KLN,.
Hong Kong
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