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GZLOZONE:GZLOZONE
Type:Power Amplifier
Number of Channels:2
Product Code:PA-K/B202232
X-ONE:X-ONE
Country/Region of Manufacture:China
Power:30 W
Amplifier Class:AB

Introduction: X-ONE is a fully discrete pure direct coupled power amplifier. The circuit adopts a classic three-stage amplifier architecture, with FET differential input+BJT voltage amplification+MOS power push-pull output. Dual single independent sound channel design, PCB integrated with rectifier filter circuit and 1237 protection circuit, the layout is very convenient for players to avoid fewer connecting wires. Reduce signal interference. It is easy to build a dual single independent channel power amplifier system. Generally speaking, the overall dynamic and control force of high-power power amplifiers are better than those of the same type of low-power power amplifiers. In particular, some low sensitivity units, such as 86dB sensitivity speakers, need higher power to serve them. How to choose between 5W pure Class A and 30W Class AB? In 5W Class A state, when the transformer and radiator are large enough, adjust the static current to 1A or above. At this time, it will be a pure Class A working state. The sound sense is mellow, but the heat output is large. The weight of heat sink per sound channel is not less than 1KG. 30W Class AB is the most economical state. You only need to adjust the current to a suitable temperature below 1A. It will be Class AB output. At this time, the temperature is very low. The bottom of the chassis can be used for heat dissipation. It is used to push a pair of 88-90dB small bookshelf speakers to listen to the voice. It has a sense of taste. However, when the sensitivity of the small bookshelf speaker is low, we focus on developing this 30W AB class. Although it is AB class, thanks to the application of BJT+MOS tubes and sound calibration, the sound produced is also very close to Small Class A, and it is stronger than Small Class A in dynamic, power and driving force. The overall sound is very direct, without too much over modification, and the mid-range and female voices are very beautiful. Input voltage: AC 22V-0-22V PCB Size: 120mm*76mm Main materials: ● NOVER filter capacitor ● Resistance of Military 718 Factory ● Omron transparent relay ● Toshiba FET K246 input tube (Pairing tube) ● Hitachi J2SJ555 2SK2586 MOS output powertube (the old tube is disassembled, but the quality is guaranteed) ● Nikon KZ feedback capacitor (can be shorted as a full self coupling amplifier) ● 25A High-speed rectifier bridge Debugging specification: ◆ On the PCB, there are two TP Test points. Measure TP two points, adjust 2K adjustable resistance, and adjust the voltage to within DC 37mV. ◆ Measure OUT+and GND, adjust 100R adjustable resistance, and use voltage connected DC 0mV. NOTE: We have DIY kit or finished board (Optional) ◆ DIY kit —- All parts need you to solder and test it. ◆ Finished board —- All parts have been welded and tested OK.

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