Amplifying Handheld Dog Repeller Signal for 30-40 ft Yard Coverage Using Guitar Amp

I have a hand held dog repeller. Is it possible to amplify this signal to cover my yard( 30-40 feet )? Can I say..., disconnect the piezo buzzer that produces the sound, and connect those wires into a small guitar amp and run that to some speakers?

Thanks for your help

Keep in mind that the hi freq. used by this equipment is also in the audio range from some people and near all kids.
If you amp the signal it is like you but a jet fighter in your garden.

Audio polution like that is covert under law in all western countrys.
In most of the parks it is even for the low power animal repeller forbiden to use, because babys can hear it and start crying.

Also, a guitar amp probably won't have the frequency range to amplify this signal.

The hand held unit is designed to be loud enough to cause enough pain to drive away any dogs that are close to you.

If you amplify the signal in the way you suggest, it will be painful to dogs for a block or two all the way round.

Imagine a high-pitched sound LOUD enough to cause enough PAIN to YOU to rapidly drive YOU away from an area !

When all your neighbours who own dogs find out what's happening, you may become VERY VERY VERY unpopular.

Just put up a fence.