The Real XL Power Amplifier
The new design input stage is 6DJ8 tube use coupling caps ( use V-Cap CuTF ) to 6C45PI driver tube working at SE mode to driver Hasimoto A-105 Interstage transformer , The interstage transformer driver to three pair KT77 power tubes 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 0.13dB 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 1.3dB 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 choke and highly efficient solid-state regulator for input driver stage.
Other One Hasimoto power transformer with Hasimoto C-core choke for power output stage.
The components , NFB value , tube type , circuit all select by listen test.
The use highest quality transformers and parts .
Hasimoto special grade CUT CORE orient high B output transformer.
Hasimoto A-105 Interstage Transformer to driver power tube.
The power supply with two separately HVB+ power supply for power output stage and input driver stage
Input driver stage power supply with highly efficient solid-state regulator.
Coupling cap use V-Cap CuTF
Output and T.H.D :
Input : RCA and XLR
Input Impedance : 100K ohm is RCA, 10K ohm is XLR .
Noise: Less than 0.5mV
|Input Sensitivity: 1.55V RMS rated output.|
|Output Taps: 4 ohm , 8 ohm , 16 ohm.|
|Damping factor : approximately 40|
|Tubes Required for each black: (6) Three matched pair KT77 Power Output , ( 1 ) 6C45PI Driver, ( 1 ) 6DJ8 Input .|
Phase Mode : Normal
Dimension: 455mm x 410mm x 245mm (W x D x H) each
Power Source: 110-117/220-240V,50/60Hz
Actual Price: HK$68000 one pair.
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong, KLN,.
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