Balanced A1 MK2   Full Balanced Tube Line Preamplifier

The Audio Experiences Balanced A1 MK2. A fully balanced tube preamp, the A1 is the latest design from the labs of world-renowned Mr. Chui Yat Sang. As a professional designer of premium audio products with over {{x}} years in development, Mr. Chui  incorporates a hand-wired, point-to-point manufacturing philosophy into every high-end audio component that we offer. The Balanced A1 is by no means an exception.



Innovative problem solving in the Balanced A1 MK2’s 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 vacuum tube to form zero negative feedback (0 NFB). The A1 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 A1’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.


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Simply put, this preamp is perfect for people who love music. Only the ultimate components are included (Dale, Philips resistors, Wima caps) ensuring the most neutral sounding music and a truly extraordinary listening experience. No need to hesitate. Bring a home a sonic paradise with the Audio Experiences Balanced A1 MK2.

Customer Feedback for Balanced A1  Full Balanced Tube Line Preamplifier

Full Silver Faceplate and Full Black Faceplate available ,Now !

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

Output :  2 Main XLR , 1 Main RCA , 1 Record RCA 

Input : CD , AV , Tape , AUX (XLR and RCA connectors).

Output Impedance :  650 ohms Balanced , 325 ohm SE Main.
Recommended load:  20K ohm or greater ( Balanced ) , 10K ohm or greater ( SE ). 

Frequency Response:  15Hz ~ 80KHz(-0.5dB)

T.H.D : <0.03% (20Hz ~ 20KHz /2V)

Input Impedance: 100K ohm

Gain: 15 dB at Balanced output , 10dB at SE output

S/N: >93dB

Channel Balance: <0.2dB(20Hz ~ 10KHz /max output)

Channel Separation: >89dB(2Hz ~ 20KHz)

Phase Mode : Normal

Max Output : 20V

Line-Stage Tubes :   12AU7 x2

Dimension: 419mm x 310mm x 90mm (W x D x H)

Weight: 5.3kg

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

Direct Price : USD$699
The shipping by Air post to USA and Europe is US$98
USA and Europe buyer use following Button 


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