I have a cuckoo clock melody circuit that is connected to the 8 Ω 0.5 W speaker and I want to replace it with the 8 Ω 1 W speaker. When I connected it the output was not that much great as the 0.5 W speaker. What will change do I need to do?

Actually, I want a more brisk and strong sound from my cuckoo melody clock so replacing it with a bigger size and configuration speakers but it looks like the circuit output drive value is lacking to satisfy the required drive value for an 8 Ω 1 W speaker, i.e. (Drive Value) 5.657 V_PP to 8 V_PP.

Kindly suggest a modification for achieving the same.