Reference One MK3 Version 2 line preamplifier

Reference one MK3 tube line preamplifier Version 2 (Since: Jan 2021)

The Reference One MK3 Version 2 (Since: Jan 2021) is Audio Experience Reference Grade line preamp. it uses one 6DJ8 at tube input stage to driver 6C45 tube with one Hasimoto line output transformer construct Class A for each channel. This design is from our Flagship grade preamplifier THE REAL.　

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

The Version 2 improved the circuit of amplifier, the sound got full upgrade about 30%.
The T.H.D of Version 2 is 0.04% 1kHz at 1V , The before Version 1.8 is 0.15% 1kHz at 1V.

The S/N of Version 2 is >113dB , The before Version 1.8 is >110dB.

Features

6C45 and 6DJ8 for Gain stage.
Hasimoto line output transformer (made in Japan).
Class A .
Gain and Volume uses TKD conductive plastic potentiometer
XLR input with JENSEN (made in USA) input transformer.
Full uses Vishay Date , Caddock , Mills resistors.
XLR output and RCA output
External power supply ( dual mono design )
Double Hasimoto Choke (made in Japan) at HVB+ power supply
Jupiter Copper foil (wax paper and Polypropylene film) coupling cap
High/Low gain selector
Gold-plated OFC copper wire for inside interconnect cable.

High/Low gain selector

Review by HiFi review.

Frequency response , volume control at 1/2 , output at 2V

Phase vs Frequency response , volume control at 1/2 , output at 2V

THD vs Frequency response , volume control at 1/2 , output at 1V

THD vs Frequency response , volume control at 1/2 , output at 2V

Specifications

Controls
Main unit : Volume , Gain, Input Selector , Output XLR/RCA Selector , High/Low gain selector .

Power supply : Power On/Of

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

Input : One pair XLR input , Three pair RCA input

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

Frequency Response: 20Hz ~ 100kHz ( 20Hz +0.4dB , 100kHz -0.8dB) at 2V output.

T.H.D : 0.04% 1kHz at 1V , 0.05% 1kHz at 2V .

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

Gain: High gain 19 dB ( XLR and RCA are same gain ) , Low gain 13dB ( XLR and RCA are same gain ).

S/N: >113dB

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

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

Phase Mode : Normal

Max Output : 26V

Line-Stage Tubes : 2 pcs 6DJ8 , 2 pcs 6C45 , 2pcs EZ81.

Dimension: Main 400mm x 310mm x 150mm (W x D x H) , power supply 400mm x 310mm x 80mm (W x D x H)

Weight: Main and power supply total 12.5kg

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

Not remote version actual price: HK$28500.

With remote ( remote volume controls only ) version actual price: HK$29800.

The Reference one MK3 have black and silver two color version.

The input transformer from Jensen upgrade to use Hashimoto input transformer add extra cost $4800.

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