Balanced A2     Full Balanced Tube Line Preamplifier 

The BALANCED A2 is Audio Experience level 3 full balanced line preamp with Remote Control . it use NEW 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 TWO 12AU7 and ONE 5687WB vacuum tube to form zero negative feedback (0 NFB). The A2 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 A2’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.





a2f3.jpg (648598 個位元組) a2f4.jpg (629018 個位元組) a2f2.jpg (494346 個位元組) a2f1.jpg (458183 個位元組) 

a2i4.jpg (549541 個位元組)  a2i1.jpg (506739 個位元組)  a2i3.jpg (495076 個位元組)  a2back.jpg (647671 個位元組) a2back2.jpg (559636 個位元組)

Feedback and Review for BALANCED A2  fully balanced line Preamplifier : Click there

a2fbn.jpg (465169 個位元組)  Black Faceplate Color version


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:  15Hz ~ 85KHz(-0.5dB)

T.H.D : <0.18% (20Hz ~ 20KHz /2V)

Input Impedance: 100K ohm XLR

Gain (Gain and Volume controls at MAX) :
20dB at XLR input to XLR output.   20dB at RCA input to XLR output.
14dB at XLR input to RCA output.   4dB at RCA input to RCA output.

S/N: >98dB

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

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

Phase Mode : Normal

Max Output : 25V

Line-Stage Tubes : 4pcs 12AU7 , 2pcs 5687WB

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

Weight: 7kg

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

Hong Kong buyer
Direct Price : HK$7500.



Room1308, 13/F,BLK C,.  
Kai Tak FTY BLDG.   
99-101 King Fuk ST,.   
San Po Kong,   KLN,.
Hong Kong
E-mail : 
WhatsApp: 93440168   
facebook :