The Real 1605MB Power Amplifier
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.
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)
Output and T.H.D :
Input : RCA
Input Impedance : 100K ohm
Test at 1W 20Hz ~ 75kHz
(20Hz -0.5dB, 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
HK$78000 one pair.
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong, KLN,.
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