H2R Electronics

• N3055 STMicroelectronics
• Transistor Element Material SILICON Transistor Polarity NPN Transistor Type GENERAL PURPOSE POWER
• Collector-emitter Voltage-Max 60 V
• Collector Current-Max (IC) 15 A and DC Current Gain-Min (hFE) 20

• Features: It offers a high safe operating area (100% tested), high DC current gain, and low saturation voltage. The device is also characterized for linear operation and is a Pb-Free device.
• Applications: It is ideal for high-power audio amplifiers, power supply circuits, disk head positioners, and other linear applications. It can also be used in power switching circuits like relay or solenoid drivers, DC-DC converters, or inverters. 

The original ON brand new tube king MJ15024, MJ15025.
The main circuit of electrolytic capacitor signal adopts Taiwan famous brand, and the main filter capacitor uses audio dedicated electrolyte capacitor.
Capacitor capacity 2 × 470UF / 100V, to ensure a strong source of continuous power support.
The resistor uses a five-ring metal resistor, and the main circuit uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio.
The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of the current. First-class PCB quality.
This board uses the current advanced UPC1237 speaker protection circuit to make your speakers safer.