Is it possible to drive old Hardware (HR<02.01) with new Firmware (>1.30)?

No. The command LAYOUT has been introduced later. Refer to application note Hardware Revision Number. An old S300 hardware version would be interpreted in a wrong way with new firmware. Polarity of the AS input has changed, an error message would occur with new firmware.

You can solve the problem with this command sequence:

ONE 0XC 24
ONE 0XD 4

Switch the amplifier off and on again.