Reference One phono mk2

Reference One Phono MK2 Preamplifier.

Reference grade Phono preamplifier .

The main unit with power supply of 2 unit design.

The Reference-One use T-LCR type RIAA EQ design, the T-LCR Type is best method for revive RIAA EQ, also is highest cost design.

It uses 12AX7 ,WE396A with Hasimoto line output transformer for input stage, special made T-LCR type RIAA EQ , 5687WB with Hasimoto line output transformer output stage( with XLR and RCA output).

The Reference One 's application of a highly efficient solid-state voltage regulator with EZ80 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 MC step up transformer use Hasimoto HM-X ( made in Japan )

Features

Western Electric 396A with Hasimoto line transformer in input stage.
5687WB with Hasimoto line transformer in output stage.
Vishay/Dale RN55, A/B , RMA Resistors
LCR network use Hasimoto Inductive
Hasimoto HM-X MC step-up transformer.
AudioCap Theta and Cardas coupling cap
Output with both XLR and RCA
Phase select switch Normal / Inverse
External power supply is dual mono design
Two Hasimoto Choke at HVB+ power supply
Phase select switch Normal / Inverse
Gain select switch with 6 position gain
MC impedance select switch

The power supply is dual mono design.

Gain select switch with 6 position gain

MC impedance select switch

T-LCR Type is Line output transformer drive the LCR network

More info for LCR network

HIGH FIDELITY Magazine test report for Reference One phono MK1

http://www.ys-audio.com/bid/aerpw.pdf

Review by HiFi review.

Specifications

Controls.
Power Supply : Power On/Of .
Main Unit : Gain select, Phase Normal / Inverse , Input MC/MM , MC Gain High/Low , MC Input 1 or 2.

Output : 1 pair Main XLR , 1pair Main RCA.

Input : MC1 input with RCA , MC2 input with RCA , MM input ( all RCA ).

Output Impedance :
600 ohms ( XLR and RCA same ) , 600 ohms minimum load.

Frequency Response: +/- 0. 2dB 20Hz to 20KHz , RIAA equalized

Input Impedance:

MC low gain:
1 = 200 ohm , 2 = 520 ohm , 3 = 120 ohm

MC high gain:
1 = 50 ohm , 2 = 135 ohm , 3 = 30 ohm

MM is 47K / 100P ( the capacitance impedance can change by module )

Gain:
1 is Low MC 68.5dB / High MC 74.5dB / MM 45dB ,
2 is Low MC 67.5dB / High MC 73.5dB / MM 44dB ,
3 is Low MC 66.5dB / High MC 72.5dB / MM 43dB ,
4 is Low MC 65dB / High MC 71dB / MM 41.5dB ,
5 is Low MC 63.5dB / High MC 69.5dB / MM 40dB ,
6 is Low MC 60dB / High MC 66.5dB / MM 37dB ,

Noise: MM 92dB (shorted input) , MC 91dB (shorted input).
signal-to-noise ratio, below 1 Volts RMS output, A weighted

Phase Mode : Normal / Inverse.

Max input : MM 80mV , MC 8mV

Distortion: Less than 0.2% at 2.8V RMS 1kHz output.

Tube Compliment : 12AX7 x2, WE396A x2, 5687WB x2, EZ80 x2.

Dimension:
Main unit , 455mm x 350mm x 120mm (W x D x H)
Power Supply ,400mm x 310mm x 80mm (W x D x H)

Total Weight: 23kg

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

Actual Price: HK$43000
　

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