Bada 1000VT Class A tube Audio pre-Amplifier & Pure Class A transistor Power Amplifier

The 1000VT gallbladder front stage is based on the classic circuit of traditional beautiful sound, using one 12AX7, 12AT7, and 12AU7 electronic tube each to form the main circuit, integrating modern technology and effective sound correction, fully demonstrating the level of the front stage.
The front power supply of the gallbladder is particularly exquisite, with completely independent and symmetrical power supply for the left and right channels. It uses an O-type transformer, classic gallbladder rectification, capacitor and choke filtering, and a high-performance constant current source voltage stabilizer to ensure excellent electronic tube characteristics, low signal distortion, and rich harmonics.
Fine tuned feedback and coupling capacitance of the circuit make the frequency characteristics of the circuit flat and smooth, with good auditory connection and inertia, and a wide sound field.
Introduction to the Pure Afterstage of 1000AML Transistor
1. The structure is the foundation of beautiful sound. The 1000AML pure rear stage power amplifier adopts the design concept of dual mono and split power supply, with independent and symmetrical distribution on the left and right sides. The transformer uses a 2mm thick iron plate with independent intervals, which is equivalent to a split power supply. In addition, the large transformer is also shielded with an iron cover and epoxy sealing to minimize vibration and magnetic leakage, making the sound background more peaceful.
2. Good symmetry, mirror flat arrangement of left and right vocal channels, with the power supply located in the middle, effectively preventing electromagnetic vibration interference and restoring pure music.
3. The Dao is powered by two transformers respectively, and the input amplifier stage adopts a high-end R-type supply to ensure stable voltage amplifier stage, which is not affected by fluctuations in high current output of the current amplifier stage, and the music details are clear.
4. Using a two-stage polarity symmetric differential circuit with a constant current source as the input stage and voltage amplification stage, the characteristics are symmetrical, which can offset some distortion and negative effects
Interference from.
5 dynamic stage uses high-power Field-effect transistor as the output dynamic load, with warm, plump and balanced sound. 6 channels use four pairs of high-power Kenkon tubes in parallel with A to output strong driving force, with smooth tone
7. Manual soldering, soldering is a famous silver tin in the fever industry, with every solder joint fully invested and every note vividly played
Product parameters
1000VT gallbladder front stage
Frequency response: 20Hz-40KHz (-0.5dB) Harmonic distortion:<0.05% Separation degree:>78dB (10KHz) Maximum power consumption: 65W
Signal to noise ratio:>95dB (A-weighted)
Benefit: 15dB increase
Net weight: 12Kg
Size: 430 * 390 * 120 (mm)
1000AML pure rear stage
Output power: Class AB 200W+200W (8Q) Class A 60W+60W (8Q) Frequency response: 20Hz-40KHz (-05dB) Separation:>58dB (10KHz) Input sensitivity: 1.5dB Harmonic distortion:<0.018% Maximum power consumption (8 ohm load at full power): 800W
Signal to noise ratio:>106dB (A-weighted) Net weight: 45Kg
Size: 430 * 510 * 240 (mm)
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