YSA150S-Reference Version 1.5 150W + 150W Stereo Valve Tube Power Amplifier
It uses two matched pair of KT150 power tubes and UL
working status to provide RMS 150W adequate output for most of the Hi-End
Speakers to ideal performance. Moreover, It use the high quality output
transformer ( Hasimoto . made in Japan).
Dual mono power supply design ( It is same one pair mono block build in at one chassis )
Huge dynamic range, both the beautiful tone color and wonderful rhythm , ultra linear circuit of the valve tubs power amplifier designed for the SACD source in the New Century. uncanny natural flowing heart-stirring sound that matches any other ultra-Fi products on the market .
The input/driver stage is new design, 12AU7 input stage direct coupling to 6H30 driver stage , The driver stage use MultiCap RTX coupling capacitors to TUNG-SOL KT150 power tube , The power tube work at P-P UL mode to driver Hasimoto special grade CUT CORE orient high B" output transformer , The output transformer has very low Insertion Loss 0.13dB only. ( Many tube power amplifier in Hi-End audio market , Their have the output transformers is over 1dB Insertion Loss . only about 10% very high price tube amplifier use under 1dB Insertion Loss of output transformer ) . The output transformer has low insertion loss is very important , the best of the best is 0 dB Insertion Loss , The output transformers for High End tube amplifier need under 1dB Insertion Loss . The Insertion Loss over 1.5dB output transformer will lost many low level music.
The components , NFB value , tube type , circuit all select by listen and instrument test .
Dual mono power supply ( this is equal one pair mono block build-in one chassis )
Power supply use Mundorf power caps
MultiCap RTX coupling caps
Hasimoto special grade CUT CORE orient high B output transformer.
Output and T.H.D :
1W per channel , 1kHz total harmonic distortion typically 0.09% (0.15% at 20Hz , 0.2% at 20KHz)
150W per channel , 1kHz total harmonic distortion typically 1.5%
Input : RCA and XLR (balanced)
Input Impedance : 100K ohm is RCA , 10K ohm is XLR .
1W 20Hz ~
100KHz ( 20Hz 0dB, 100KHZ 0dB)
Input Sensitivity : 1.6V / 150W 25.5dB Gain ( Test at 8 ohm )
Output Taps: 16 ohm ,8 ohms, 4 ohms.
|Noise: Less than 0.5mV|
|Damping factor : approximately over 23|
Phase Mode : Normal
|Tubes Required per channel: Two Matched pair KT150 Power Output , ( 1 ) 6H30 Driver , ( 1 )12AU7 Input .|
Dimension: 433mm x 460mm x 233mm (W x D x H)
|Total Weight: 32kg|
Power Source: 220-240V,50/60Hz
With XLR input ( Jensen input tran ) HK$39300.
Without XLR input (Jensen input tran) HK$38300.
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong, KLN,.
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