Reference X tube line preamplifier     (Since: July 2022)

The Reference X (Since: July 2022) is Audio Experience Prepare Flagship Grade line preamp. It 's circuit is new design . it uses one E88CC tube at input stage to driver NOS Siemens EC8010 gold pin tube with one Hashimoto line output transformer construct Class A for each channel.


The Reference X 's application of a highly efficient solid-state voltage regulator with EZ81 Tube for current regulator and Hashimoto choke in the HVB+ power supply . Also it use the external power supply get highest S/N, the power supply is dual mono design.




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Main unit : Volume , Input gain, Input Selector , Output XLR/RCA Selector , Main gain selector .

Power supply : Power On/Of

Output :  Two pair XLR Main Output  , Two pair RCA Main Output .

Input : Two pair XLR input , Two pair RCA input. 

Output Impedance :  60 ohms
Recommended load:  600 ohm or greater.

Frequency Response:  20Hz ~ 100kHz ( 20Hz 0dB , 100kHz -2.5dB) at 2V output.

T.H.D : 0.035%  1kHz at 2V

Input Impedance: 50K ohm XLR , 50K ohm RCA.

Gain: 11 dB, 13.8 dB, 17.8 dB, 19 dB ( XLR and RCA are same gain ).

S/N: >115dB

Channel Balance: <0.1dB(20Hz ~ 20KHz /max output)

Channel Separation: >98dB(2Hz ~ 20KHz)

Phase Mode : Normal

Max Output : 28V

Line-Stage Tubes : 2 pcs E88CC , 2 pcs EC8010 , 2pcs EZ81.

Dimension: Main 400mm x 310mm x 163mm (W x D x H) , power supply 400mm x 310mm x 80mm (W x D x H)

Weight: Main and power supply total 13.8kg

Power Source: 110V-120V / 220V-240V, 50/60Hz


Not remote version actual price: HK$39,000.

With remote ( remote volume controls only ) version actual price: HK$41,000.

The Reference X  have black and silver two color version.






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