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电子管功放音色柔和甜美,被现代国内外音响界誉为功放中的新贵族。其中A类(又称纯甲类)功放音色更是圆润细腻,谐音丰富,胆味浓郁,悦耳动听,深受广大音响爱好者与发烧友们的青睐。 如功放管选用2A3、300B等优质直热式三极管,虽然音质不凡,但输出功率不大。为了能制成有较大输出功率的A类功放,现采用845直热式三极大功率电子管来制作。 图1为A类电子管双声道功率放大器电原理图。以下对本电路作简要地分析。 SRPP前置放大器
Tube amp soft and sweet tone, the modern audio at home and abroad as the power amplifier in the new aristocracy. One Class A (also known as pure Class A) amplifier is more rounded mellow, rich rhyme, rich bile, sweet, by the majority of audio enthusiasts and enthusiasts of all ages. Such as the power amplifier tube selection 2A3, 300B and other high quality direct thermal transistor, although the sound quality is extraordinary, but the output power is not large. In order to be able to produce a larger output power Class A amplifier, is now using the 845 direct thermal three-pole high-power tube to produce. Figure 1 is a type A tube dual-channel power amplifier schematic. The following brief analysis of the circuit. SRPP preamplifier