I assume the transistors are the final stage for your home cinema amplifier. The best idea is: try to find the original ones, the audio equipments are very sensible when using the replacement components. What model is your amplifier?
It's not amplifier it is sharp lcd TV ( lc46a65m ) due to situation in libya those days I couldn't find or get this transistors from outside so I need to help me to find best alternative transistors ...