The Real 1605 MB mono block power amplifier

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 Jupiter Copper foil (wax paper and Polypropylene film) 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.

Features

Class A Single Ended Triode no negative feedback
EML 1605 Super Triode power tube
New design ECC81 and 45 triode tubes driver interstage
Coupling cap use Jupiter Copper foil (wax paper and Polypropylene film) coupling cap
Gold-plated OFC copper wire for inside interconnect cable.
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..
Hasimoto A-305 Interstage Transformer to driver EML 1605 power tube.
Hasimoto H-30-3.5S CUT CORE orient high B Output Transformer
Hasimoto C-10-200W Choke
Hasimoto C-10-130W Choke
Hasimoto special grade Power Transformer
The speaker connections is Star(Germany)

Gold-plated OFC copper wire for inside interconnect cable.

Hasimoto C-10-200W CUT CORE orient high B Choke.

Hasimoto A-305 CUT CORE orient high B Interstage Transformer

Hasimoto H-30-3.5S CUT CORE orient high B Output Transformer

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 ~ 73kHz (20Hz -0.5dB, 73KHz -3dB)
Test at 23W 20Hz ~ 73kHz (20Hz -2dB, 73KHz -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$82,890 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
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