前置放大器、線路放大器和功率放大器各適用什

一(yi)般(ban)先(xian)是(shi)由(you)前(qian)置(zhi)放(fang)大(da)器(qi)放(fang)大(da)輸(shu)入(ru)的(de)信(xin)號(hao)
，比(bi)如(ru)通(tong)過(guo)麥(mai)克(ke)風(feng)拾(shi)取(qu)的(de)聲(sheng)音(yin)信(xin)號(hao)
，由(you)於(yu)它(ta)比(bi)較(jiao)弱(ruo)，需(xu)要(yao)先(xian)被(bei)放(fang)大(da)到(dao)一(yi)定(ding)的(de)電(dian)平(ping)才(cai)可(ke)以(yi)到(dao)其(qi)它(ta)級(ji)上(shang)。通(tong)常(chang)前(qian)置(zhi)具(ju)有(you)較(jiao)高(gao)的(de)電(dian)壓(ya)增(zeng)益(yi)，可(ke)以(yi)將(jiang)小(xiao)信(xin)號(hao)放大到標準電平上。



xianlufangdaqishiweilechuanshushiyongde，weilejianxiaoshusongshuaijian，shijieshoufangdedaozugouqiangdexinhao
，shusongshiyaojinxingdianliufangdahetuidong，youshiyexuyaotigaodianyashusong，birudingyaguangbojiushiliyongzhegeyuanlide。

gonglvfangdaqizhuyaoshifangdadianliu
，zheyangcainengtuidongdizudeyangshengqifachushengyin。dangran，zhegelizishianyinpinshilijiangde
，ruoshishepinxinhao
，hezhegejiangfahuiyouxiechuru，danshiyisichabuduo，xiangfashejidegongfang，shuchushishuchudaotianxianshangde。