I need some advice on what is the quickest way to change the alert signal output through a amplifier to run a fixed tone transducer with on board tone driver ? Problem to start with is my customer has issues of the speaker alerting device on this agricultural implement monitor is too quiet . So I suggested taking the signal output through an higher power transistor and having some caps to filter the Tone hz pulsed as it would then pulse the Piezo buzzer on/Off @1hz as the speaker did previously but just high db. The existing driver on pcb is a 20ma npn transistor pulled low at the gate . What would your suggestions be ????