YSA150S-MK3 Reference-X 150W + 150W Stereo Valve Tube Power Amplifier (Since: August 2020)
Audio Experience YSA150S-MK3 Reference-X is a 150W + 150W Stereo Valve Tube Power Amplifier.
It uses two matched pair of Gold Lion KT88
( KT120, KT150, KT170 )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 new design input stage is 12AU7 direct coupling to 5687WB driver stage to 6H30 cathode follow driver stage , The driver stage uses coupling cap to KT88 power tube , The KT88 ( KT120, KT150, KT170 ) work at Class AB1 UL P-P mode to driver Hasimoto output transformer , The Hasimoto special grade CUT CORE orient high B output transformer has very low Insertion Loss 0.15dB 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 )
Hashimoto special grade choke
The coupling cap use Miflex KFPM copper foil polypropylene film caps
Hasimoto special grade CUT CORE orient high B output transformer.
Review by HiFi review #429
YSA150S-MK3 Reference-X use KT170
Output and T.H.D :
Max: 210W ( each CH )
Input : RCA
Input Impedance : 100K ohm
1W 20Hz ~
100KHz ( 20Hz 0dB, 100KHZ 0dB)
Input Sensitivity: 1.65V RMS rated output (150W) 28.5dB Gain ( Test at 8 ohm )
Output Taps: 16 ohm ,8 ohms, 4 ohms.
|Noise: Less than 0.5mV|
|Damping factor : approximately over 33|
Phase Mode : Normal
|Tubes Required : (8) two matched pair KT88 Power Output ( or KT120, KT150, KT170 ) , ( 2 ) 6H30 Driver, ( 2 ) 5687WB Driver , ( 2 )12AU7 Input .|
Dimension: 433mm x 460mm x 233mm (W x D x H)
|Total Weight: 33kg|
Power Source: 220-230V,50/60Hz
Actual Price: HK$48000
Add extra fee HK$2500 for the amplifier with Tung-Sol KT150 power tubes.
Add extra fee HK$4500 for the amplifier with Tung-Sol KT170 power tubes.
Add extra fee HK$2500 for the amplifier add Balanced input with Jensen input transformer (both with Balanced and RCA input)
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong, KLN,.
E-mail : email@example.com
facebook : https://www.facebook.com/AudioExperienceYSaudio/