HiFi 2.0 Channel Class A Power Amplifier Board DIY Stereo Audio Amp

Description

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HiFi 2.0 Channel Class A Power Amplifier Board DIY Stereo Audio Amp
Item description
This is assembled 2.0 channel board and tested well.
Introduction
When powered by ±50V power supply, the maximum undistorted output power is 110W, default class A output is 30W which needs a 6kg heat sink of each channel. If you want to higher class A output power, please use larger heat-sink and adjust the static current.
The power transistors are installed below the heat sink to facilitate the heat dissipation; the ultra-wide and thick copper foil wiring ensures the smooth pass of large current.
The board uses a mirror-symmetrical design, which is more neat and convenient to install. Compatible with TO-3 gold-sealed transistors and TO-264 plastic-sealed transistors.
With speaker protection reducing wiring inside the machine; plug-in terminals are used for power output electronics, making it easier to pull out and secure in contact.
The LOWBIAS (low bias current) selection switch has been added, which can be used to conveniently switch between pure Class A and Class AB working states.
Working voltage DC ±36-±60V, it is recommended to use DC ± 50V (AC dual 38V). It is best to supply power to two channels independently, each channel transformer power is not less than 300W, 500W is recommended, output voltage high current 0-38V, 0-38V; and small current 0-12V for the speaker protection part.
The heat dissipation aluminum bridge (350*70*15mm) is made of all-aluminum at one time and is brushed and black anodized. When installing, you only need to tightly connect and fasten the 6 fixing holes on the heat dissipation bridge with the heat sink with screws. The diameter of the fixing hole is 7mm, and the distance between the holes is 50mm.
Parameters
Working voltage: DC ±36V-±60V(DC ±50V /AC Dual 38V 6A is recommend)
Output power: 50W(±50V / 600mA quiescent current)
Default quiescent current: 100 / 450mA( class A output 30W)
Matched heat-sink of each channel: ≥7.5kg(class A 50W), ≥5.5kg(class A 30W)
PCB size: 350*128mm
PCB height: 27mm
Transistor: ON MJ15024G, MJ15025G
Radiator size: 350 * 70 * 15mm
Weight: 3Kg
Notice:
1. Default quiescent current is100 / 450mA which is measured in 420*200*60mm and 6kg heat-sink, please adjust the quiescent current according to your own heat-sink.
2. Because of different batches, the ROE capacitors will be a little different from the pictures, but their parameters and specifications are all the same.
Packing List
1 x Amplifier Board
1 Set x Signal line
1 Set x Screws
1 Set x Pillars
1 Set x Plug Spring
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Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including
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When powered by ±50V power supply, the maximum undistorted output power is 110W, default class A output is 30W which needs a 6kg heat sink of each channel. If you want to higher class A output power, please use larger heat-sink and adjust the static current.