Special Custom-made Product


The special version YSA300S Reference mono block power amplifier

YSA300S-XL Reference 

Completed 5/2017

Owner :Mr Lee  "Limage Lee"  (Hong Kong)

 

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.13% (0.3% at 20Hz , 0.13% at 20KHz)
200W per channel , 1kHz total harmonic distortion typically 1.2% (40Hz 2.5%, 20KHz 2.5%) rated output

RMS Max: 300W

Input :  RCA and XLR (balanced)

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

Frequency Response:  

1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ -0.5dB)
200W  20Hz ~ 65kHz (20Hz 0dB , 65kHz -3dB)

Input Sensitivity :  1V / 250W

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

Noise: Less than 0.5mV
Damping factor : approximately over 23

Phase Mode : Normal

Tubes Required per channel: 
Three Matched pair KT88 Power Output ,
( 1 ) 6H30 Driver, ( 1 ) 5687WB Driver , ( 1 )12AU7 Input .

Dimension: 433mm x 460mm x 233mm (W x D x H) each

Total Weight two block: 58kg

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

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The YSA300X-XL Reference in Mr Lee listen room.

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The special version 6C33C SE stereo power amplifier .

Completed 5/2017

Owner :Mr Kolb ( Switzerland )

Features

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

 

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 1% ( 20Hz 2.2% , 20KHz 0.9%)
18W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA

Input Impedance : 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 74kHz  (20Hz -1.6dB, 74KHz -3dB)
Test at 18W  20Hz ~ 65kHz  (20Hz -3dB, 65KHz -3dB)

Input Sensitivity :  0.5V / 18W (rated output)   27dB 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

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

Total Weight: 20kg

Power Source: 240V,50Hz

 

 

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The Real grade: The Real 1605 Stereo Valve Tube Amplifier.

Completed 7/2016

Owner : Mahi (Hong Kong)

THE REAL grade  1605SE 25W+25W stereo power amplifier.

Features

Specifications

Output and T.H.D : 
1W per channel , 1kHz total harmonic distortion typically 0.5% (1.5% at 20Hz , 0.5% at 20KHz)
25W per channel , 1kHz total harmonic distortion typically 5% (rated output)

Input :  RCA 

Input Impedance : RCA 100K ohm 

Frequency Response:

Test at 1W 20Hz ~ 100kHz (20Hz 0dB, 20kHz 0dB, 100KHz -2dB)
Test at 25W 20Hz ~ 100kHz (20Hz -1.5dB, 20kHz  0dB, 100KHz -2.7dB)

Input Sensitivity :  1.3V / 25W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 12AU7 x2 ,6V6-GT x2, 1605 x 2, 5AR4(GZ34) x 2.

Dimension: 430mm x 410mm x 300mm (W x D x H)

Weight: 33Kg

Power Source: 220V(50/60Hz)

 

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The Reference grade power amplifier

Reference-One MK3 mono amplifier.

Completed 6/2016

Owner : (Hong Kong)

 

Audio Experience Reference One MK3 Mono Block Power Amplifier is a Class AB1 PP design power amplifier. It provides sound deep and wide stage, accompanies with reality sound image and a emotions sound presentation.
 
It uses two matched pair of Tung-Sol KT150 power tubes and Class AB1 UL PP working status to provide 160W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, the high quality output transformer combines with high performance Class AB UL PP 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. 

 

Features

The new design input stage is 12AU7  direct coupling to 5687WB driver stage to 6H30 cathode follow driver stage , The driver stage uses AuricapXO coupling cap to KT150 power tube , The KT150 work at Class AB1 UL P-P mode to driver Hasimoto output transformer , The Hasimoto special grade CUT CORE orient high B output transformer has very low Insertion Loss 0.15dB 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.

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

 

realxlout.jpg (707814 個位元組) Hasimoto special grade CUT CORE orient high B output transformer.

 

Specifications

Output and T.H.D :  
1W , 1kHz total harmonic distortion typically 0.06% (20Hz 0.07%, 20KHz 0.08%)
160W 1kHz total harmonic distortion typically 1.9%  (30Hz 3%, 20KHz 2.5%)(rated output)

Max: 230W

Input :  RCA and XLR 

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

Frequency Response:  
1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ 0dB)
160W  20Hz ~ 100kHz (20Hz -1dB , 100kHz -2.6dB)

Noise: Less than 0.5mV

Input Sensitivity: 1.8V RMS rated output.
Output Taps: 4 ohm , 8 ohm , 16 ohm.
Damping factor : approximately 36
Tubes Required for each black: (4) two matched pair KT150 Power Output , ( 1 ) 6H30 Driver, ( 1 ) 5687WB Driver , ( 1 )12AU7 Input .

Phase Mode : Normal

Dimension: 300mm x 438mm x 233mm (W x D x H) each

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

 

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The Real grade: 211SE Mono Block Power Amplifier.

Completed 5/2016

Owner : Mr (China)

 

THE REAL grade  211SE 25W mono block power amplifier.

Features

Specifications

Output and T.H.D : 
1W per channel , 1kHz total harmonic distortion typically 0.3% (0.9% at 20Hz , 0.4% at 20KHz)
25W per channel , 1kHz total harmonic distortion typically 5% (rated output)

Input :  RCA 

Input Impedance : RCA 100K ohm 

Frequency Response:

Test at 1W 20Hz ~ 73kHz (20Hz 0dB, 20kHz 0dB, 73KHz -3dB)
Test at 25W 20Hz ~ 70kHz (20Hz -1.5dB, 20kHz 0dB, 70KHz -3dB)

Input Sensitivity :  1.1V / 25W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 12AU7 x2 ,5687WB x2, 211 x 2, 5AR4(GZ34) x 4.

Dimension: 455mm x 350mm x 300mm (W x D x H)

Each Block Weight: 26kg , Total Weight: 52Kg

Power Source: 220 or 230V,50/60Hz

 

 

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The special version 2A3 SE stereo power amplifier .

Completed 5/2016

Owner :呂先生 ( Hong Kong )

 

Features

 

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 1% ( 20Hz 2% , 20KHz 1%)
4W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA

Input Impedance : RCA is 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 80kHz  (20Hz -1.2dB, 20kHz -0.2dB, 80KHz -3dB)
Test at 4W  20Hz ~ 80kHz  (20Hz -1.2dB, 20kHz -0.2dB, 80KHz -3dB)

Input Sensitivity :  0.55V / 4W (rated output)

Output impedance : 4ohm 8ohm 16phm

Noise: Less than 1.8mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 5687WBx2 , 2A3 x 2, 274B x 1

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

Total Weight: 19kg

Power Source: 220V,50Hz

 

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Full set system for JBL DD66000

Completed 3/2016

Owner :Mr ( Taiwan )

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The Real grade tubes electronic crossover with Reference one MK3 tube line preamplifier

The line preamplifier with electronic crossover together.

The mono block with external power supply , 4 unit design.

This tubes electronic crossover is special design for JBL66000 speaker.

It use T-LC type design.

Tubes use 6DJ8x2, 6C45x2, 12B4 x4 , 5687WB x2 , EZ80 x4.

 

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YSA300S - Reference mono block power amplifier

300W KT120 power amplifier for driver DD66000 low frequency.

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SONATAS - Reference MK2  Stereo Valve Tube Power Amplifier

82W KT120 power amplifier for driver DD6600 high frequency

http://www.ys-audio.com/sonrefe.htm

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The Level 4 special version 300B PSE mono block power amplifier .

Completed 2/2016

Owner :Mr Ma ( Hong Kong )

 

Features

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.7% 
15W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA and XLR

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

Frequency Response:

Test at 1W  20Hz ~ 57kHz  (20Hz -0.2dB, 20kHz -0.3dB, 57KHz -3dB)
Test at 15W  20Hz ~ 57kHz  (20Hz -3dB, 20kHz -0.3dB, 57KHz -3dB)

Input Sensitivity :  0.9V / 15W (rated output)

Output impedance : 4 ohm 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 5687WA x2 , 300B x 4, 5AR4 x 2

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

Total Weight: 28kg

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

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The Real grade: VIVALDI  211SE  Integrated Stereo Valve Tube Amplifier.

Completed 1/2016

Owner : Mr Yip (Hong Kong)

VIVALDI  is a 211 SE 25W x 2 Stereo Valve Tube Integrated Amplifier

Features

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.3% (1.3% at 20Hz , 0.5% at 20KHz)
25W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA and XLR

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

Frequency Response:

Test at 1W  20Hz ~ 56kHz  (20Hz -1.5dB, 20kHz -0.3dB, 56KHz -3dB)
Test at 25W  20Hz ~ 56kHz  (20Hz -2.5dB, 20kHz -0.3dB, 56KHz -3dB)

Input Sensitivity :  0.5V / 25W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 5687WA x2 ,6189A x2, 211 x 2, 5AR4(GZ34) x 4.

Dimension: 430mm x 410mm x 300mm (W x D x H)

Total Weight: 29.5kg

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

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The special version 300B PSE mono block power amplifier .

Completed 5/2015

Owner :Mr Wong ( Hong Kong )

The 300Bx2 PSE 17W mono block.

Features

 

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.4% ( 20Hz 0.8% , 20KHz 0.4%)
17W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA

Input Impedance : RCA is 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 100kHz  (20Hz  0dB, 20kHz -0.10dB, 100KHz -0.1dB)
Test at 17W  20Hz ~ 100kHz  (20Hz -0.5dB, 20kHz -0.1dB, 100KHz -0.5dB)

Input Sensitivity :  1.4V / 17W (rated output)

Output impedance : 8ohm  ( can set 4 ohm , 16 ohm )

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 12UA7x2 , 5687 x 2, 300B x4, 5U4G x 1

Dimension: 430mm x 340mm x 250mm (W x D x H)

Total Weight: 21kg

Power Source: 220V,50Hz

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The special version PX25 SE stereo power amplifier .

Completed 4/2015

Owner :Kevin ( Hong Kong )

Features

 

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 1.7% ( 20Hz 5% , 20KHz 1.1%)
6W per channel , 1kHz total harmonic distortion typically 6%  (rated output)

Input :  RCA

Input Impedance : RCA is 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 43kHz  (20Hz -0.4dB, 20kHz -0.95dB, 43KHz -3dB)
Test at 6W  20Hz ~ 43kHz  (20Hz -1.8dB, 20kHz -0.85dB, 43KHz -3dB)

Input Sensitivity :  0.9V / 6W (rated output)

Output impedance : 8ohm  ( can set 4 ohm , 16 ohm )

Noise: Less than 1.5mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: MH4x2 , PX25 x 2, FW4/500 x 1

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

Total Weight: 19kg

Power Source: 220V,50Hz

 

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The Real grade:

KT150 stereo power amplifier

Completed 4/2015

Owner : 陳先生(香港)

Features

Specifications

Output and T.H.D :  
1W , 1kHz total harmonic distortion typically 0.03% (20Hz 0.07%, 20KHz 0.06%)
95W 1kHz total harmonic distortion typically 1.5%  (20Hz 4%, 100Hz 2%, 20KHz 2.5%)(rated output)

Max: 140W

Input :  RCA and XLR 

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

Frequency Response:  
1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ 0dB)
95W  20Hz ~ 100kHz (20Hz -0.05dB , 100kHz -1dB)

Noise: Less than 0.5mV

Input Sensitivity: 1.35V RMS rated output.
Output Taps: 4 ohm , 8 ohm , 16 ohm.
Damping factor : approximately 35
Tubes Required for each black: (2) one matched pair KT150 Power Output , ( 1 ) 6H30 Driver, ( 1 ) 5687WB Driver , ( 1 )12AU7 Input .

Phase Mode : Normal

Dimension: 455mm x 410mm x 245mm (W x D x H) 

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

 

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The Real grade:

THE REAL EML1605 PP full balanced mono block power amplifier

Completed 8/2014

Owner : 張先生(上海)

 

Full balanced design . EML1605 PP power amplifier.

Features

Specifications

Output and T.H.D :  
1W , 1kHz total harmonic distortion typically 0.25% (20Hz 0.5%, 20KHz 0.3%)
50W 1kHz total harmonic distortion typically 1.2%  

RMS98W

Input :  XLR x1

Input Impedance :  200K ohm

Frequency Response:  
1W    20Hz ~ 75KHz ( 20Hz 0.4dB, 75KHZ -3dB)
50W  20Hz ~ 60kHz (20Hz -0.6dB , 60kHz -3dB)
98W  20Hz ~ 40KHz (20Hz -3dB , 40kHz -3dB)

Noise: Less than 0.5mV

Input Sensitivity: 1.4V / 50W , 2V / 98W .
Output Taps: 4 ohm , 8 ohm , 16 ohm.
Damping factor : approximately 30
Tubes Required for each black: (2)one matched pair EML1605 Power Output , ( 2 ) 5687WB Driver , ( 2 )12AU7 Input . ( 2 )5R4

Phase Mode : Normal

Dimension: 455mm x 420mm x 245mm (W x D x H) each

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

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The special version 211SE 25W+25W stereo power amplifier .

Completed 5/2014

Owner :Kevin ( Hong Kong )


5687 and 6189 input and driver tubes , 211 power tubes, power supply tubes 5AR4 x4 .

Hasimoto power Transformer, Hasimoto Choke, Tamuta F2013 output transformer

Jensen power caps.
All coupling cap use Amtrans Golden Black.

 

Specifications

Output and T.H.D :  
1W, 1kHz total harmonic distortion typically 0.5% (1.2% at 20Hz , 1.5% at 20KHz)
25W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA 

Input Impedance : RCA is 100K ohm  

Frequency Response:

Test at 1W  20Hz ~ 20kHz  (20Hz -0.35dB, 20kHz -3.5dB)
Test at 25W  20Hz ~ 20kHz  (20Hz -0.88dB, 20kHz -5dB)

Input Sensitivity :  1.25V / 25W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 5687 x2 , 6189 x2 , 211 x 2, 5AR4(GZ34) x 4

Dimension: 455mm x 410mm x 280mm (W x D x H)

Total Weight: 33kg

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

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The special version SIEMENS F2a11 PP 40W mono block power amplifier .

Completed 4/2014

Owner :Chris ( Hong Kong )

Features

Specifications

Output and T.H.D :  
1W, 1kHz total harmonic distortion typically 0.08% (0.3% at 20Hz , 0.07% at 20KHz)
40W per channel , 1kHz total harmonic distortion typically 1.5%  (rated output)

Input :  RCA 

Input Impedance : RCA is 100K ohm  

Frequency Response:

Test at 1W  20Hz ~ 100kHz  (20Hz -0.45dB, 20kHz -0dB, 100KHz -2dB)
Test at 40W  20Hz ~ 100kHz  (20Hz -0.6dB, 20kHz -0.3dB, 100KHz -2.4dB)

Input Sensitivity :  0.84V / 40W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 12AU7 x4 , F2a11 x 4, 5AR4(GZ34) x 2

Dimension: 455mm x 210mm x 250mm (W x D x H)

Total Weight: 30kg

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

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The Special version Sonatas- Reference MK2 Stereo Valve Tube Power Amplifier

Completed 4/2014

Owner :Mr ( Hong Kong )

 

The KT150 stereo amplifier 98W+ 98W

12AU7 , 6H30 input driver tubes , KT150 power tubes

Hasimoto Transformer.

HW-100-5 output , C-1-400 choke, Special order power Tranformer.


V-Cap

Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.04% (0.05% at 20Hz , 0.09% at 20KHz)
98W per channel , 1kHz total harmonic distortion typically 0.9%

Input :  RCA and XLR (balanced)

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

Frequency Response:  

1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ -0.62dB)
98W  20Hz ~ 100kHz (20Hz -0dB , 100kHz -2dB)

Input Sensitivity :  1.73V / 98W

Output Taps: 16 ohm ,8 ohms, 4 ohms.                                                      

Noise: Less than 0.6mV
Damping factor : approximately over 24

Phase Mode : Normal

Tubes Required per channel: One Matched pair KT150 Power Output , ( 1 ) 6H30 Driver , ( 1 )12AU7 Input .

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

Total Weight: 29kg

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

 

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The special version SONATAS-I  Integrated Stereo Valve Tube Amplifier

Completed 4/2014

Owner :Mr Joseph ( Hong Kong )

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Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.4% 
3W per channel , 1kHz total harmonic distortion typically 0.6% (0.6% at 30Hz , 0.8% at 20kHz)
60W per channel , 1kHz total harmonic distortion typically 1.5%(1.5% at 30Hz , 2.9% at 20kHz)

Controls : Volume, Gain , Input Selector , Power On/Of

Input :  RCA x 4 pair 

Input Impedance :  100K ohm

Frequency Response :

3W    20Hz ~ 59KHz ( 20Hz -1.5dB, 59KHZ -3dB)
60W  20Hz ~ 59kHz (20Hz -1.5dB , 59kHz -3dB)

Input Sensitivity :  
0.2V / 60W ( volume at Max , gain at high)
0.4V / 60W ( volume at Max , gain at low)

Output impedance : 4 ohm / 8 ohm                                         

Noise: Less than 0.7mV
Damping factor : approximately over 20

Phase Mode : Normal

Tubes Required: 
Line stage preamplifier: 6C51H-B Nuvistor triode x4
Power amplifier: KT88  Power Output x4 , 12AU7 Driver x2, 12AT7 Input x2.

Dimension: 445mm x 400mm x 180mm (W x D x H) each

Total Weight: 20kg

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

 


 

The special version 2A3 SE stereo power amplifier .

Completed 3/2014

Owner :Mr Wong ( Hong Kong )

Features

 

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Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.5% ( 30Hz 1.6% , 20KHz 2.7%)
4.7W per channel , 1kHz total harmonic distortion typically 5%  (rated output)

Input :  RCA

Input Impedance : RCA is 100K ohm

Frequency Response:

Test at 1W  20Hz ~ 75kHz  (20Hz -0.56dB, 20kHz -0.45dB, 75KHz -3dB)
Test at 4.7W  20Hz ~ 75kHz  (20Hz -1.2dB, 20kHz -0.3dB, 75KHz -3dB)

Input Sensitivity :  0.83V / 4.7W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal

Construction: Copper and High quality aluminum

Tubes Required: 6SN7 x2 , 2A3 x 2, 5U4G(VT-244) x 1

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

Total Weight: 19kg

Power Source: 220-240V,50Hz

 


 

Upgrade the EL156 x4 PP Mono Block Power amplifier.

These EL156 power amplifier are completed at 8/2010. about the info please see there

We upgraded they at 1/2014.

We design and build a new input and driver stage for they.

The result is improve the S/N and THD.

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Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.03% (0.05% at 20Hz , 0.06% at 20KHz)
112.5W per channel , 1kHz total harmonic distortion typically 0.55% (0.8% at 30Hz , 0.9% at 20KHz)
128W per channel , 1kHz total harmonic distortion typically 1.2% (1.3% at 30Hz , 1.9% at 20KHz)(rated output)

Input :  RCA and XLR

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

Frequency Response:  

1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ -2.1dB)
128W  20Hz ~ 100kHz (20Hz -0.5dB , 100kHz -2.9dB)

Input Sensitivity :  1.5V / 128W (rated output)

Output Taps: 16 ohm ,8 ohms, 4 ohms.                                                      

Noise: Less than 0.35mV
Damping factor : approximately over 28

Phase Mode : Normal

Tubes Required per channel: (4) EL156 Power Output , ( 1 ) 12AU7 Driver , ( 1 )12AU7 Input .

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

One block weight: 30kg

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

 


 

The Reference 6L6 stereo power amplifier .

Completed 1/2014

Owner :Mr Joe ( Hong Kong )

The 6L6G stereo amplifier 35W+ 35W

12AT7 , 12AU7 input driver tubes , 6L6G power tubes

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Specifications

Output and T.H.D :  
1W per channel , 1kHz total harmonic distortion typically 0.12% (0.19% at 20Hz , 0.1% at 20KHz)
35W per channel , 1kHz total harmonic distortion typically 1.5% (rated output)

Input :  RCA 

Input Impedance :  100K ohm 

Frequency Response:  

1W    20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ -1.3dB)
35W  20Hz ~ 95kHz (20Hz -1.9dB , 95kHz -3dB)

Input Sensitivity :  0.85V / 35W (rated output)

Output Taps: 16 ohm ,8 ohms, 4 ohms.                                                      

Noise: Less than 0.6mV
Damping factor : approximately over 15

Phase Mode : Normal

Tubes Required per channel: One Matched pair 6L6G Power Output , ( 1 ) 12AU7 Driver , ( 1 )12AT7 Input .

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

Total Weight: 21kg

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

 


 

The Real grade:

THE REAL Max special version all balanced mono block power amplifier

Completed 12/2013

Owner : Jason ( Hong Kong )

 

True Full balanced design power amplifier.

Features

 

They have two power amplifier unit for positive pole and negative pole at each block. Two block total four power amplifier unit. 

The structure of each power amplifier unit:
The input stage is 12AU7 SRPP direct coupling to 12AU7 driver stage , The driver stage use high quality capacitors to Gold Lion KT77 power tube , The Gold Lion KT77 work at P-P UL mode to driver Hasimoto HW-100-5 high quality output transformer , The HW-100-5 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.

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

 

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Specifications

Output and T.H.D :  
1W , 1kHz total harmonic distortion typically 0.1% (20Hz 0.15%, 20KHz 0.03%)
160W  , 1kHz total harmonic distortion typically 2%  
200W , 1kHz total harmonic distortion typically 3.5%  (rated output)
340W , Max output.

Input :  Balanced ( XLR ) x 1

Input Impedance :  200K ohm

Frequency Response:  
1W    20Hz ~ 41KHz ( 20Hz -0.1dB, 41KHZ -3dB)
200W  20Hz ~ 41kHz (20Hz -0.2dB , 41kHz -4dB)

Noise: Less than 0.5mV

Input Sensitivity: 3V RMS rated output.
Damping factor : approximately 32
Tubes Required for each black: 4 match pair KT77 Power Output , 1pcs 12AU7 Driver , 1pcs 12AU7 Input .

Phase Mode : Normal

Dimension: 410mm x 438mm x 233mm (W x D x H) each

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

 


 

The Real grade tubes electronic crossover with Reference one MK2 tube line preamplifier

Completed 11/2013

Owner : KK ( Macao )

The line preamplifier with electronic crossover together.

The mono block with external power supply , 4 unit design.

This tubes electronic crossover is special design for TAD 2404 speaker.

It use T-LC type design.

Tubes use 12AU7x2, WE417Ax2, 12B4 x4 , 5687WB x2 , 6X5 x2.

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The YSA300B-XLS special version power amplifier .

Completed  11/2013

Owner : Hiendy member friend ( Hong Kong )

 

Emission Labs 300B XLS power tube.

5687WA driver tube.

5AR4 .

 

Specifications

Output : 12.5W per channel , 1kHz total harmonic distortion typically 5%

Distortion: 1W  20Hz THD+N 1.2% , 1KHz THD+N 0.29% , 20kHz THD+N 0.2%

Input :  RCA 

Input Impedance :  100K ohm

Frequency Response:

  
12.5W  20Hz ~ 75kHz (20Hz -0.96dB , 75kHz -3dB)

Input Sensitivity :  0.93V / 12.5W

Output Taps:16ohm,  8 ohms, 4 ohm                                                

Noise: Less than 1mV
Phase Mode : Normal

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

Total Weight: 21kg

Power Source: 220V 50Hz

 

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The Reference KT120 stereo power amplifier .

Completed 10/2013

Owner :Mr ( Beijing , China )

 

The KT120 stereo amplifier 84W+ 84W

12AU7 , 6H30 input driver tubes , KT120 power tubes

Hasimoto Transformer.

HW-100-5 output , C-1-400 choke, Special order power Tranformer.


V-Cap

Specifications

Output and THD: 

7W per channel , 1kHz total harmonic distortion typically 0.11%  (20Hz THD 0.11%, 20KHz 0.19%)
84W per channel , 1kHz total harmonic distortion typically 1%

Max 110W.

Input :  RCA 

Input Impedance :  100K ohm

Frequency Response:  

84W  20Hz ~ 100kHz (20Hz -0.02dB , 20kHz -0.03dB, 70KHz -1.2dB , 100KHz -2.3dB)

Input Sensitivity :  1.8V / 84W

Output Taps:16ohm,  8 ohms, 4 ohms.                                                       

Noise: Less than 0.6mV
Phase Mode : Normal

Dimension: Dimension: 455mm x 350mm x 260mm (W x D x H) 

Total Weight: 28kg

Power Source: 220V 50Hz

 

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The YSA300B special version.

This special version use Emission Labs 300B XLS tube.

Completed  8/2013

Owner : Mr Derek Lam ( Hong Kong )

 

Specifications

Output : 9W per channel , 1kHz total harmonic distortion typically 5%

Distortion: 1W  20Hz THD+N 1.7% , 1KHz THD+N 0.2% , 20kHz THD+N 0.2%

Input :  RCA 

Input Impedance :  100K ohm

Frequency Response:  

1W  20Hz ~ 60kHz  (20Hz -0dB, 60kHz -3dB)
9W  20Hz ~ 60kHz (20Hz -1.9dB , 60kHz -3dB)

Input Sensitivity :  0.8V / 8W

Output Taps:16ohm,  8 ohms.                                                  

Noise: Less than 1mV
Phase Mode : Normal

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

Total Weight: 19kg

Power Source: 220V 50Hz

 

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The Reference grade 300B SE stereo power amplifier

Completed 7/2013

Owner :Mike ( Hong Kong )

The Stereo 300B SE power amplifier 

WE437A input driver tubes , 300B power  tubes, power supply tubes 5U4G and 80

All top grade Tango Transformer.
X-2.7S output , NC-16 Interstage , LC choke, Special order Tango power Transformer.

Specifications

Output : 

1W per channel , 1kHz total harmonic distortion typically 0.3%  (20Hz THD 0.9%)
6W per channel , 1kHz total harmonic distortion typically 1.8%
8W per channel , 1kHz total harmonic distortion typically 2.8%  (20Hz THD 5.6%)
10W per channel , 1kHz total harmonic distortion typically 4.4%

Input :  RCA 

Input Impedance :  100K ohm

Frequency Response:  

1W  20Hz ~ 20kHz  (20Hz -0.3dB, 20kHz -1.6dB)
6W  20Hz ~ 20kHz (20Hz -0.5dB , 20kHz -1.9dB)
8W  20Hz ~ 20kHz (20Hz -0.7dB , 20kHz -2dB)

Input Sensitivity :  0.7V / 8W

Output Taps:16ohm,  8 ohms, 4 ohms.                                                       

Noise: Less than 1mV
Phase Mode : Normal

Dimension: Dimension: 455mm x 350mm x 260mm (W x D x H) 

Total Weight: 32kg

Power Source: 220V 50Hz


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The Reference grade tubes electronic crossover

Completed 6/2012

Owner : Mr ( Hong Kong )

The mono block with external power supply , 4 unit design.

This tubes electronic crossover is special design for JBL DD66000 speaker.

It use T-LC type design, 2way 24dB Linkwitz-Riley .

Tubes use 12B4 x4 , 5687WB x2.

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The Reference grade 211 SE power amplifier .

Completed 9/2011

Owner :Mr ( Beijing , China )

The mono block 211/845 SE amplifier 

12AT7 , 5687 input driver tubes , 211 or 845 tubes, power supply tubes 5AR4 x4 for each CH.

All top grade Tango Transformer.
X-10SF output , NC-20F Interstage , LC choke, Special order Tango power Tranformer.

UniCrystal TM OCC 5N SILVER Hookup Wire .

WBT silver grade  RCA and speaker connections .

Jensen power caps.

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The Reference grade power amplifier .

Completed 11/2010

Owner :Mr Jonas (Canada)

300B x4 PP mono block power amplifier

output transformer Tango XE-60 grade (60W) for 300B x4 output.
Tango LC grade Choke.
Tango power transformer.

Output : 40W watts from 20Hz to 20kHz +/- 0.5dB.

Input : RCA x 1

Input Impedance : 100K ohm

Frequency Response: 8Hz ~ 50K +/-1dB at 1W.

S/N: >105dB

Input Sensitivity: 1.4V RMS rated output.

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

Damping factor : approximately 20


The Reference grade power amplifier .

Completed 8/2010

Owner : Mr Lap (Hong Kong)

EL156 x4 PP Mono Block Power amplifier.
120W at 30Hz , Max 200W .

Complement :  
Tango FC-120-5 output transformer , Tango LC-5-250D Choke , Sowter main transformer.
Jensen input transformer , V-cap coupling caps, Cardas RCA and speaker connections.

Input tube 12AU7 , Driver tube 12AU7 , Power tube Telefunken EL156 x4.

Mr Lap use they drive MBL 101 MK2 speaker.

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The Reference grade Phono preamplifier.

Completed 12/2009

Owner : Mr Lap (Hong Kong)

 

It is TOP Reference grade Phono preamplifier.

It will a new product to 2010 , The product series name is "THE REAL"

The mono block with power supply of 4 unit design. 

It use T-LC type EQ design, the T-LC Type is best method for revive phono EQ, but the cost is highest.

It uses 12AX7 , WE396A for input stage with TANGO line output , special made T-LC type RIAA EQ , WE417A with TANGO output stage.

Specifications:

Controls
Power Supply : Power On/Of .
Main Unit : Output XLR / RCA , Phase Normal / Inverse , Input MC/MM , MC Gain High/Low , MC Input 1/2 , MC1 impedance select , MC2 impedance select.

Output :  1 pair Main XLR , 1pair Main RCA.

Input : MC1 input , MC2 input , MM input ( all RCA ).

Output Impedance :   600 ohms ( XLR and RCA same ) , 600 ohms minimum load.

Frequency Response: -/+ 0.2dB 20Hz to 20KHz , RIAA equalized  ( -3db at 65khz )

Input Impedance: MC can change by input module, MM is 47K / 100P ( can change by input module ).

Gain: MC low 78dB , MC high 85dB , MM 55dB.

Hum and Noise: 95dB below 10mV input MM.

Phono Overload: MM 180mV.

Tube Compliment : 12AX7 x2 , WE396A x2 , WE417A x2 , 6X4 x2


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The Reference grade power amplifier

Completed  7/2009

Owner : Mr Derek Lam ( Hong Kong )

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Mr Derek Lam is using AVALON Eldolon Diamond speaker at 250sf .

These pair amplifier are design for he.

The amplifier use 2 pair KT88 pp and TANGO FC-120-5 ouput transformer at each block.

Full balanced design.

Output Power : 
RMS 120W / 32Hz sine wave.


The PX25 P-P power amplifier

Completed 6/2009

Owner : Mr Costa (UK)

 

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The PX25 P-P power amplifier .

Output Power : 
RMS 15W / 30Hz sine wave , Max 20W / 30Hz.

Transformer complement :  
Output Tango XE-60-5P , Interstage Tango NC16 , Choke LC-3-350 , R-Core main transformer.

Owner Mr Costa offer the tubes and tubes sockets .

 


The LC Type phono stage preamplifier

Completed date: 11/2008

Owner : Mr Chan ( H.K. )

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The LC Type is best method for revive phono EQ, but the cost is highest.

This phono can help me go a new LP world.

It use 12AX7 , WE396A for input stage, Western Electric line output , special made LC type RIAA EQ , WE396A output stage.

45dB gain for MM , 47K Input Impedance .

Output Impedance :  650 ohms Balanced , 325 ohm SE Main.
Recommended load:  18K ohm or greater ( Balanced ) , 9K ohm or greater ( SE ). 

Frequency Response:  +/- 0.20dB, 20Hz to 20kHz

We are planning this phono stage to accept order.

Please e-mail to me , if you have question about this phono stage.

 


 

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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