When my amp/receiver bought the farm a decade ago, I decided to try a 50-watt/channel 12-volt class-D amp after seeing the specs. It cost under $50, and I powered it with a hefty wall-wart (120v-1.5amp to 12v) left over from the 90s. It's been on 24/7 since, never used for over 10 watts/ch. The savings went into a decent pair of near-field speakers ... the most important part of great sound.