The price includes a left and right channel independent power amplifier (two in total), mirror symmetry!
Product Features
1. All AC filaments are used for lighting, with a lively and dynamic sound, closely attached to the 90DB sensitivity speaker. There is no sound of any AC noise, and it feels as quiet as if it has not been turned on. (When using 5H choke)
2. Use one audio dedicated front stage transistor 6N8P for two-stage amplification, and one for reverse phase driving. The power transistor can be EL34 or KT88, suitable for driving speakers with impedance above (4-8) Ohm sensitivity 88db.
3. Rated output power: 30WX2 (electronic tubes have the advantage of strong overload capacity, so their actual undistorted output power is equivalent to that of a 120w+120w transistor power amplifier! Due to the fact that all levels of electronic tubes work in Class A amplification state, their distortion is small, their sound is sweet, soft, and their hearing resistance is extremely high!)
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Metal film resistor with accuracy up to 1% and imported electrolytic capacitor are used. Philips main capacitor and Japanese brand sub capacitor are used as power filter capacitor. The main part resistance adopts AB or Philips resistance. The potentiometer is ALPS 42 duplex 100KA.
5 C (capacitance) L (inductance) R (resistance) C multi-level filtering, with high signal-to-noise ratio. The inductance is 5H 350MA high-quality oxygen free copper wire EI iron core inductance.
6. Using 250W EI105X55 power transformer connection:
Supporting output transformer (No. OP964505) 6.5K 60W push-pull output cow
7. The coupling capacitor adopts Sibi thin film copper foot capacitor, with a mellow sound and high-frequency fine and transparent!
This set of power amplifier electronic tubes comes standard with 4 Dawn 6N8P tubes and 4 Guiguang KT88 power tubes. The machine adopts field effect fast recovery diode rectification.
The 9-point grounding circuit is designed according to the principle of 1-point grounding, with 1.6mm thick copper wire as the main wire. The component layout is reasonable, the bottom noise is minimal, and it is convenient for component upgrading and replacement. The capacitors are all soldered on the top layer.
10. Machine dimensions: width 220MM, depth 385MM (including horn terminal length), height 240MM (including electronic tube and foot pad height)
11. Single machine weight: 12 kilograms
12. Chassis material: The top and bottom plates are made of 1.5MM thick stainless steel plates, and the bottom plate is equipped with a grid, which has good heat dissipation effect. The wooden frame is made of solid red walnut wood, not veneer. The thickness of the wood is 20MM, which is sturdy and not easily deformed.
Circuit structure reference drawings (component parameters shall be based on the actual object, and the drawings are for reference only)
