Power Amplifier 450W Mono

I have a Project making home audio and karaoke, I could order for audio by using one 12 inch Full range speakers and one subwoofer speaker 12 inch. im using this Power Amplifier 450W Mono Circuit is matched for my previous project Tone Control C828 + Sub and Mic Pre amp 4558. See Circuit schematic power amplifier 450W :





List of components you can see in the picture, for my power supply