IDX-PRO+VDI

[orrtizz1]

Good morning.
I have put together the most recent IDX-PRO circuit on a breadboard to check its operation, based on the schematic shown below. However, although there are amplitude changes in the Rx signal, there is no reaction in the speaker when passing a metal. In addition, the transistors connected to the speaker get too hot. If someone could advise me on how to check some parts of the circuit to find the error, I would greatly appreciate it.

[ArchibaldSTM]

Here is the correct diagram. Pay attention to the value of the capacitance C37. If the output transistors are heated, look at the pinout (with a tester). It is better to remake the SENS knot as shown in the picture.