Retrofit Subwoofer on High Performance w/o Subwoofer

[Kenn]

I also have V60 2021 without subwoofer. Amp and wires looks like this:

https://ibb.co/Mym9G2rF
https://ibb.co/zhhZXvK1

I haven't found solution how to connect sub to this amp. Or is it even possible without aftermarket amp..?

I think the empty pins (6/14) between the green lines is the output for the sub. If enabled with orbit you can use a voltmeter to se if there is any juice. About 2 volts on the pins I think. Or just connect a speaker.

However the amp is weak (about 1/4 of power compared to the Harman Kardon amp) so maybe it won't be enough for full subwoofer performance. In that case, connect an extra amp thru high level in to amp and then to the subwoofer.

Let me know how it goes?