The Real  1605MB Power Amplifier  



Audio Experience THE REAL 1605MB Mono Block Power Amplifier is a Class A SET Single Ended no negative feedback design power amplifier. It provides sound deep and wide stage, accompanies with reality sound image and a emotions sound presentation.
 
It uses one EML 1605 super triode power tubes working at Class A Single Ended Triode no negative feedback configuration status to provide 23W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, the high quality output transformer combines with high performance Class A SE circuit design lead to an extremely low loss, wide sequence sound effect and excellent phases output. 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. 

The input/driver stage is new design for EML 1605 power tube, The input  ECC81 tube use M-CAP® Supreme Silver / Gold & Oil coupling cap to 45 triode power tube to driver Hasimoto A-305 Interstage transformer, This new design driver stage got the wide frequency range and very good sound. The interstage transformer direct coupling to EML 1605 power tube , The EML 1605 power tube working at Class A SET Single Ended Triode mode to driver Hasimoto H-30-3.5S output transformer , The Hasimoto Hasimoto H-30-3.5S CUT CORE orient high B output transformer has very low Insertion Loss 0.3dB 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 power supply with two separately HVB+ power supply for power output stage and  input driver stage:
One Hasimoto power transformer with Hasimoto C-core choke and 5R4WGA rectifier tubes for power output stage..
One Hasimoto power transformer with Hasimoto C-core choke and 80 rectifier tubes for driver stage..

    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. 

 


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Features


kouzou3.jpg (41838 個位元組)  Gold-plated OFC copper wire  for inside interconnect cable.

c10.jpg (332843 個位元組) Hasimoto C-10-200W  CUT CORE orient high B Choke.

a305.jpg (485082 個位元組) Hasimoto A-305 CUT CORE orient high B Interstage Transformer

h30.jpg (300557 個位元組) Hasimoto H-30-3.5S CUT CORE orient high B Output Transformer

 

real1605mb11.jpg (566120 個位元組) The speaker connections is Star(Germany)

 


 Specifications

Output and T.H.D :  

1W per channel , 1kHz total harmonic distortion typically 1.2% (20Hz is 1.5% , 20KHz is 1.1%)
23W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA 

Input Impedance : 100K ohm 

Frequency Response:

Test at 1W  20Hz ~ 75kHz  (20Hz  -0.5dB, 75KHz  -3dB)
Test at 25W  20Hz ~ 75kHz  (20Hz  -2dB, 75KHz  -3dB)

Input Sensitivity :  0.75V / 23W      25.5dB  gain (Test at 8 ohm )

Output impedance : 4 ohm , 8ohm , 16ohm.

Noise: Less than 1.5mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: ECC81 x2 , 45 x2 , EML 1605 x 2, 5R4WGA x 2 , 80 x2

Dimension: 455mm x 350mm x 250mm (W x D x H)

Total Weight: 38kg ( total two block )

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

Actual Price: 
HK$78000 one pair.

 

 

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