SONATAS - Plus MK2 Stereo Valve Tube Power Amplifier

Audio Experience SONATAS - Plus MK2 is Stereo Valve Tube Power Amplifier.
It uses one matched pair of Mullard EL34 power tubes and UL working status to provide RMS 60W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, It use the high quality output transformer ( Hasimoto made in Japan).
Huge dynamic range, both the beautiful tone color and wonderful rhythm , ultra linear circuit of the valve tubs power amplifier designed for the DVD - Audio and SACD source in the New Century. uncanny natural flowing heart-stirring sound that matches any other ultra-Fi products on the market .


   The input stage is 12AT7 SRPP direct coupling to 12AU7 driver stage , The driver stage use high quality capacitors to EL34 power tube , The EL34 work at P-P UL mode to driver Hasimoto HW-40-5  high quality output transformer , The HW-40-5 CUT CORE orient high B output transformer has very low Insertion Loss 0.2dB 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 bias adjust of power tube is very easy , all bias test point and bias adjust at top of amplifier , you not need open the amplifier for adjust the power tube bias.

   The components ,  NFB value , tube type , circuit all select by listen test.

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hw40.jpg (868987 個位元組)  hw40b.jpg (668165 個位元組) The info of Hasimoto HW-40-5 CUT CORE orient high B output transformer.


Output :  
40W per channel , 1kHz total harmonic distortion typically 0.5%
50W per channel , 1kHz total harmonic distortion typically 1%
60W per channel , 1kHz total harmonic distortion typically 1.3%

Input :  RCA 

Input Impedance :  100K ohm

Frequency Response:  

25W  20Hz ~ 100kHz  (20Hz -0.8dB, 100kHz -0.5dB)
40W  20Hz ~ 80kHz (20Hz -2dB , 80kHz -0.5dB)

Input Sensitivity :  0.9V / 60W

OUTPUT TAPS: 8 ohms, 4 ohms.                                                        It can offer 16 ohm output .

S/N: >100dB
Damping factor : approximately over 18

Phase Mode : Normal

Tubes Required: One Matched pair EL34  Power Output , ( 1 ) 12AU7 Driver , ( 1 )12AT7 Input .

Dimension: 430mm x 300mm x 160mm (W x D x H) each

Total Weight: 19kg

Power Source: 110-117 or 220-240V,50/60Hz

Actual Price: HK$17680 


Room1308, 13/F,BLK C,.  
Kai Tak FTY BLDG.   
99-101 King Fuk ST,.   
San Po Kong,   KLN,.
Hong Kong
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