Panasonic Wireless Subwoofer Pairing Issue

[sophie31]

Hi. I bought a used Panasonic SC-ALL70T soundbar and it's great but of course lacking bass without the SB-ALL70T wireless subwoofer. I thought an alternative Panasonic wireless subwoofer would suffice so I went ahead and bought a used Panasonic SB-HWA480 wireless subwoofer from the SC-HTB480 soundbar set but I can't get it to link up with the SU-ALL70T soundbar. Am I missing something or am I wasting my time? Many thanks, Sophie.

P.S. I have tried the following but with no success.

 

[sophie31]

Things to note. The SB-HWA480 subwoofer I've bought is 23W and Bluetooth Ver 3.0 whereas the subwoofer that the soundbar usually comes with (SB-ALL70T) is 30W and Bluetooth Ver 2.1 +EDR. Could this be what is stopping them from linking together?