论文部分内容阅读
一、CD 唱机是否可以直接同功放连接CD 唱机一般有两种输出方式:耳机输出和线路输出。耳机输出的电平近60mv,如果功放电压增益为26dB(最常见),直接接入功放,则在8Ω负载上只能得到180mw 即0.18w 的功率,音量很小。而线路输出的电平为1.6V,阻抗常在10KΩ左右,就电平来看,足以驱动任何功放,如果功放上没有音量电位器,那么1.6V 的输入电平足以使任一台功放输出满功率,一般聆听环境是
First, CD player can connect directly with the amplifier CD player generally has two output: headphone output and line output. Headphone output level of nearly 60mv, if the amplifier voltage gain of 26dB (the most common), direct access amplifier, the 8Ω load can only get 180mw or 0.18w power, the volume is small. The line output level of 1.6V, the impedance is often about 10KΩ, the level of view, enough to drive any amplifier, if the amplifier does not have a volume potentiometer, then the input level of 1.6V enough to make any amplifier output full Power, the general listening environment is