Reference One MK-V Line Preamplifier

Reference one MK-V tube line preamplifier (Since: Nov 2021)

The Reference One MK-V (Since: Nov 2021) is Audio Experience Reference Grade line preamp. 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 One '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.

The New MK-V improved the circuit of amplifier, the sound got full upgrade about 30% than MK-3 Ver2
The T.H.D of MK-V is 0.04% 1kHz at 2V , The before MK-3 Ver 2 is 0.05% 1kHz at 2V

The S/N of MK-V is >114dB , The before MK-3 Ver 2 is >113dB.

Features

NOS Siemens EC8010 gold pin tube and E88CC tube for Gain stage.
Hashimoto line output transformer (made in Japan).
Class A .
Gain and Volume uses TKD conductive plastic potentiometer
XLR input with Lundahl (made in Sweden) Amorphous core input transformer.
Vishay Date , AMRA 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.

Lundahl (made in Sweden) Amorphous core input transformer.

High/Low gain selector

Review by HiFi review #429

Manual

Specifications

Controls
Main unit : Volume , Input gain, Input Selector , Output XLR/RCA Selector , High/Low 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 -3dB) at 2V output.

T.H.D : 0.04% 1kHz at 2V , main gain set at high gain.

Input Impedance: 10K ohm XLR , 50K ohm RCA.

Gain: High gain 17.8 dB ( XLR and RCA are same gain ) , Low gain 13.8dB ( XLR and RCA are same gain ).

S/N: >114dB

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

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

Phase Mode : Normal

Max Output : 26V

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 12.5kg

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

Not remote version actual price: HK$30,800.

With remote ( remote volume controls only ) version actual price: HK$32800.

The Reference one MK-V have black and silver two color version.

YS-Audio
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong,   KLN,.
Hong Kong
Tel:(852)93440168
E-mail : info@ys-audio.com
WhatsApp: 93440168
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