I have a PoE VoIP telephone which i've opened up. It has a 6ohm 2W mini speaker built in to it as pictured below. Is there any way of adding some components to amplify the sound output so that I can replace this 6ohm 2W speaker with something like a 8ohm 40W speaker? I've cut the wires from the mini speaker and wires the red/white to the red of a 40W 9ohm speaker and the white to the black. It seems to work but still seems to be same loudness as the mini speaker so need to somehow amplify it without the need for any external power source
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