Hello, need help for buying STK404-140 IC

[sivachows340]

Hi there, two days back my pioneer sub woofer (S-RS3SW) stop working machanic said IC issue i think IC number STK404-140 so, please help me where can we get this IC

 

[ShantaramChari]

Stk Series IC were mainly used in 80's as well as 90's audio systems, people were easily getting stk series ic from shops. Now a days you can only find one ic of stk that is Stk 4141ii. You can find the desired ic in Deck System. You can use a equivalent ic of stk if you don't find the desired one