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KA-66和KA-88在线路方面力求简洁,而又使各项技术指标达到Hi-Fi水平,KA-66前级采用本公司独创甲类电路设计,由运放至NE5532作恒流放大,NE5534作电压放大来完成对输入信号的10倍放大,差分放大则选用场效应管K246、J103,推动级采用日立配对管2SB649、2SD669和2SDK214、2SJ77作驱动,末级采用四对东芝名管2SC3280、2SA1301作末级电流放大输出,使该机输出功率达到100W(8Ω)。K246、J103和发烧名管BC550、BC560作差动放大,从而使整机
KA-66 and KA-88 try their best to simplify the line, and make all the technical indicators reach Hi-Fi level. The KA-66’s first stage adopts the company’s original Class A circuit design, amplified by op amp to NE5532, NE5534 for voltage amplification to complete the input signal amplification of 10 times, differential amplification is the use of FET K246, J103, driven by Hitachi matching tube 2SB649, 2SD669 and 2SDK214,2SJ77 for the driver, the last stage with four Toshiba tube 2SC3280 , 2SA1301 for the final stage current amplification output, the aircraft output power to 100W (8Ω). K246, J103 and fever tube BC550, BC560 for differential amplification, so that the whole machine