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音响发烧友中流行在大功率放大器中使用f_T高的大功率管。在功率越做越大的情况下,为此必须付出较大的代价,这不仅指在经济付出上,而且包括由此引起不易解决好的自激对音质的破坏及对可靠性的威胁。其实,我们只要把占功率能量约70％的中低频段和占30％的高频段分别做成功放,就完全能解决上面的问题。这就是“前级分频”或曰“电子分频”功放。显而易见,做一台RMS100W的全频段功放比做一台RMS高频段30W+中低频段70W的功放成本要高,制作要难,可靠
Popular audio enthusiasts in high-power amplifiers use f_T high power tube. In the case of bigger and bigger power, it has to pay a great deal for it. This not only means that the economy is paying off, but also the damage to the sound quality and the threat to the reliability caused by the hard-to-solve self-excitation. In fact, as long as we put the power of about 70% of the low-frequency band and 30% of the high-frequency band were made successful amplifier, it can completely solve the above problems. This is the “pre-division” or “electronic crossover” amplifier. Obviously, to make a RMS100W full-band amplifier than a high-frequency 30W RMS in the low-band 70W amplifier cost is higher, the production difficult and reliable