Scheherazade MK3 line tube preamplifier

Scheherazade MK3 Tubes Line Preamplifier

Scheherazade MK3 is Audio Experience Level 4 line preamp.

It is a new design preamplifier . The balanced input buffer stage use one E88CC tube for each channel, it provide high input impedance ( Balanced input 400k ohm ) to low output impedance and true balanced input. The line output amplifier stage use half ECC82 tube at input stage to driver 5842 (417A) tube with one Hashimoto line output transformer construct Low output impedance ,Class A for each channel.

The Scheherazade MK3 's application of a highly efficient solid-state voltage regulator with two 6X4 Tube ( one 6X4 for each channel.) for current regulator in the HVB+ power supply . Also it use the external power supply get highest S/N.

Features

New design balanced input buffer stage use E88CC tube.
High balanced input impedance 400k ohm
Two pair XLR input ( true balanced ) , two RCA input.
New design line output amplifier use ECC82 and 5842(417A) , Class A.
Hasimoto line output transformer (made in Japan).
Volume uses TKD conductive plastic potentiometer (made in Japan).
Two pair XLR output ( true balanced ) and two pair RCA output
External power supply
Gold-plated OFC copper wire for inside interconnect cable.

Gold-plated OFC copper wire for inside interconnect cable.

Hasimoto line output transformer

New design.

External power supply.

Review by HiFi review.

Specifications

Controls
Main unit : Volume, Input gain , Input Selector, Output gain 19dB/13dB , Output XLR/RCA Selector .
Power supply : Power On/Of

Output : Two pair XLR Main Output ( true balanced ) , Two pair RCA Main Output .

Input : Two pair XLR line input ( true balanced ) , Two pair RCA line input.

Output Impedance : 52 ohm
Recommended load: 600 ohm or greater.

Frequency Response:
20Hz ~ 90kHz ( 20Hz 0dB, 90kHz -3dB ) Test at gain 13dB , XLR input, XLR/RCA output, output 1V.

T.H.D :
0.076% Test at gain 13dB , XLR input , XLR/RCA output, output 1V.

Input Impedance: 400k ohm XLR , 50k ohm RCA.

Gain:
RCA input , XLR/RCA output 13dB / 19dB
XLR input , XLR/RCA output 7dB / 13dB

S/N: >111dB (0.040mv)

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

Channel Separation: >96dB(2Hz ~ 20KHz)

Phase Mode : Normal

Max Output : 25V

Tubes : 2pcs E88CC , 1pcs ECC82 , 2pcs 5842(417A) , 2 pcs 6X4 .

Dimension:
main 430mm x 310mm x 100mm (W x D x H) ,
power supply 160mm x 135mm x 60mm (W x D x H).

Weight: Main and power supply total 11kg

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

　
Actual Price: HK$18,800

Add volume remote , add extra cost $2,300.

Add AV-bypass , add extra cost $900.

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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