YSA6C33C-A  18W+18W Stereo Valve Tube Power Amplifier

Audio Experience YSA6C33C-A  is a 18W + 18W Stereo Valve Tube Power Amplifier.
The power amplifier use one 6C33C power tubes work at Class A Single Ended Triode no negative feedback configuration status to provide 8.5W adequate output . Moreover, It use the high quality output transformer ( Hasimoto . made in Japan).

   The input stage use 5687WA tube to driver 6C33C power tube . The 6C33C tube work at Class A Single Ended Triode mode to driver Hasimoto H-20-600 high quality output transformer , power supply of power stage with two GZ34 rectifier tubes ,The Hasimoto H-20-600 CUT CORE orient high B output transformer has very low Insertion Loss 0.3dB only.  ( Many SET tube power amplifier in Hi-End audio market , Their have the output transformers is over 2dB 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. 

    This power amplifier case structure and parts arrangement are perfect, the signal path is directly and shortly connected. Great heat dissipation, an anti-shock and anti-RF function to guarantee it works at a very stable status. For sure, this machine is produced by point-to-point methodology






 h_20_600.jpg (725025 個位元組) Hasimoto H-20-600 Output Transformer

 6c33cafr1w.jpg (713540 個位元組) Frequency Response at 1W ( Test by Audio Precision ) 

    6c33cafr18w.jpg (672718 個位元組) Frequency Response at 18W ( Test by Audio Precision ) 

6c33ca1.jpg (552863 個位元組) 6c33ca3.jpg (575125 個位元組) 6c33ca4.jpg (570452 個位元組) 6c33ca5.jpg (613336 個位元組) 6c33ca6.jpg (696190 個位元組) 6c33ca7.jpg (572102 個位元組) 6c33ca8.jpg (518996 個位元組)




Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 1.2% ( 30Hz 3% , 20KHz 1.1%)
18W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA

Input Impedance : 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 80kHz  (20Hz -1.8dB, 80KHz -3dB)
Test at 18W  20Hz ~ 80kHz  (20Hz -3dB, 80KHz -3dB)

Input Sensitivity :  0.6V / 18W (rated output)   26dB gain ( test at 8 ohm)

Output impedance : 4ohm 8ohm 16ohm

Noise: Less than 1.5mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 5687WB x2 , 6C33C x2 , 5AR4 x 2

Dimension: 430mm x 340mm x 230mm (W x D x H)

Total Weight: 22kg

Power Source: 220V,50Hz

Actual Price: HK$23500


Room1308, 13/F,BLK C,.  
Kai Tak FTY BLDG.   
99-101 King Fuk ST,.   
San Po Kong,   KLN,.
Hong Kong
E-mail : info@ys-audio.com 
WhatsApp: 93440168   
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