SONATAS-I  55W+55W Integrated Stereo Valve Tube Amplifier


Audio Experience SONATAS-I  is a 55W + 55W Integrated Stereo Valve Tube Power Amplifier.
 
The Sonatas-I is a true integrated amplifier , It have True line stage preamplifier, The power amplifier stage uses one matched pair of Mullard EL34 power tubes and UL working status to provide RMS 55W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, It use the high quality output transformer ( TANGO . 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 .

Features

The Line stage preamplifier is new design with new technical, It uses two Russian 6C51H-B Nuvistor triode tube working at Class-A for Line stage. The Nuvistor triode tube is tube technical, it have super long life , super wide frequency response , super low noise , shockproof super low microphonics. This new line stage have high-definition and very good musical.

The input stage of power amplifier  is 12AT7 SRPP direct coupling to 12AU7 driver stage , The driver stage use high quality capacitors to Mullard EL34 power tube , The EL34 work at P-P UL mode to driver TANGO FX-40-5 high quality output transformer , The FX-40-5 output transformer has very low Insertion Loss 0.24dB 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 have listen test.　

　

sii3.jpg (105421 個位元組) sii4.jpg (111231 個位元組) sii5.jpg (107310 個位元組) The new design 6C51H-B Nuvistor triode tube line stage preamplifier.

　

sits.jpg (100177 個位元組) fx40.jpg (202663 個位元組) The Tango FX-40-5 output transformer.

　

The power transformer is special audio R-core transformer , high current , low noise . 

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sio2.jpg (95142 個位元組) sir.jpg (103366 個位元組)  sil.jpg (91824 個位元組) sib.jpg (92658 個位元組)  

   

Specifications

Output :  RMS 55W(1KHz)

Controls : Volume, Gain , Input Selector , Power On/Of
Input :  RCA x 4 pair 

Input Impedance :  100K ohm

Frequency Response at 55W:  20Hz ~ 20K Hz ( 20Hz - 2dB, 20K Hz -0.6dB )    ,   1W: 10Hz ~ 50K Hz ( -3dB)

Input Sensitivity :  
0.3V / 55W ( volume at Max , gain at high)
0.5V / 55W ( volume at Max , gain at low)

Output impedance : 4 ohm / 8 ohm                                         
S/N: >100dB ( volume at min )
Damping factor : approximately over 18

Phase Mode : Normal
Tubes Required: 
Line stage preamplifier: 6C51H-B x4
Power amplifier: EL34  Power Output x4 , 12AU7 Driver x2, 12AT7 Input x2.

Dimension: 445mm x 400mm x 180mm (W x D x H) each
Total Weight: 15kg

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

Actual Price: HK$14500

　

YS-Audio
Room1308, 13/F,BLK C,.  
Kai Tak FTY BLDG.   
99-101 King Fuk ST,.   
San Po Kong,   KLN,.
Hong Kong
Tel:(852)93440168    
E-mail : info@ys-audio.com 
 WhatsApp: 93440168   
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