The standard force pairing mode on most bluetooth devices is generally pressing and holding the power button which initiates the force pair mode of the device...
I googled the Audionic Mega Series bluetooth devices for a force pair mode , even in the User Guide there is no mention of force pair..
As per the device you can try the following methods
- Press and Hold the Standby / Input mode on the speakers
- Press and hold the Bluetooth (BLU) button on the remote
- Press / Hold the "Reset" button on the remote
That should initiate the bluetooth pairing , if there are any lights on the device it should change to give you an indication. let me know if that doesnt work can explore more options