P1mm

Reference One Phono Preamplifier. Version 1.5

Reference grade Phono preamplifier. (version 1.5)

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 ,5670(WE396A) with JENSEN line output transformer for input stage, special made T-LCR type RIAA EQ , 5670(WE396A) with JENSEN line output transformer output stage( with XLR and RCA output).

The Reference One 's application of a highly efficient solid-state voltage regulator with 6X4 Tube for current regulator and Tango choke in the HVB+ power supply . Also it use the external power supply get highest S/N.

The MC step up transformer use Top model Jensen ( made in USA )

Features

GE 5670 with Jensen line transformer.
Class A .
Vishay/Dale RN55, A/B , RMA Resistors
LCR network use High Nickel (permalloy) Inductive
Jensen Top Grade MC step-up transformer.
MC Input with both XLR and RCA
Output with both XLR and RCA
Phase select switch Normal / Inverse
External power supply
Two Tango Choke at HVB+ power supply

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

More info for LCR network

HIGH FIDELITY Magazine test report.

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

Specifications

Controls.
Power Supply : Power On/Of .
Main Unit : 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 / XLR , MC2 input with RCA / XLR , 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 is 12ohm ( for 1.5 ~ 45 ohm internal Impedance of MC cartridge )
MC high gain is 3ohm ( for 0.5 ~ 9 ohm internal Impedance of MC cartridge )
MM is 47K / 100P ( the capacitance impedance can change by module )

Gain: MM gain 40dB, MC low gain 61dB, MC high gain 68dB

Noise: MM 90.5dB (shorted input) , MC 90dB (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 .05% at 0.5V RMS 1kHz output.

Tube Compliment : 12AX7x2, 5670(WE396A)x4, 6X4 x1.

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: 18kg

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

Actual Price: HK$35000
　

YS-Audio
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