The Real  1605SE Power Amplifier  New version



Audio Experience THE REAL 1605SE Mono Block Power Amplifier is a Class A SET Single Ended 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 SET Single Ended Triode configuration status to provide 25W 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, it uses 12AU7 input tube direct coupling to 5687WB driver tube working at SE mode to driver Hasimoto A-305 Interstage transformer, This new design driver stage got the low distortion and wide frequency range. The interstage transformer direct coupling stage 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 components ,  NFB value , tube type , circuit all select by listen test.


n1605b.jpg (406314 個位元組) n1605c.jpg (371558 個位元組) n1605d.jpg (387165 個位元組) n1605e.jpg (360380 個位元組) n1605f.jpg (390484 個位元組) 

n1605i.jpg (417869 個位元組) n1605j.jpg (358190 個位元組) r1605i2.jpg (97525 個位元組) r1605i3.jpg (172967 個位元組) n1605g.jpg (432662 個位元組)


Features


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

 

 wide frequency range , low distortion , low phase shift , good damping factor .


 Specifications

Output and T.H.D :  

1W per channel , 1kHz total harmonic distortion typically 0.56% (20Hz is 1.3% , 20KHz is 0.56%)
25W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Max 80W per channel.

Input :  RCA and XLR

Input Impedance : RCA is 100K ohm , XLR is 10K ohm 

Frequency Response:

Test at 1W  20Hz ~ 100kHz  (20Hz  -0dB, 100KHz  -0.1dB)
Test at 25W  20Hz ~ 100kHz  (20Hz  -1.7dB, 100KHz  -2dB)

Input Sensitivity :  1V / 25W (rated output)

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

Noise: Less than 0.8mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 12AU7 x2 , 5687WA x2 , EML 1605 x 2, 5R4GYB x 2

Dimension: 430mm x 340mm x 280mm (W x D x H)

Total Weight: 29kg ( total two block )

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

Actual Price: 
With XLR input HK$58800 one pair.
Without XLR input HK$57600 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