Retrofit Subwoofer on High Performance w/o Subwoofer

[hanczi69]

You are mixing up the settings. There are 4 variants in the config what you have is 01 Performance audio. 
Your current AUD support 02- High Performance audio but you will need to wire sub and the rear door speakers. 

So thats how it should be yes. The problem is that the AMP is wired as shown on the picture. Speakers are already wired through the AMP even though the variant selected in orbit is 01 Performance Audio.

That does not make sense at all. First of all,  the correct setting is from 01 - Performance audio to 02 - High Performance audio. Because he has the entry level AUD without center output.   Then he needs to rewire the speakers to be driven from the AUD and not from the IHU. 
It's a simple test. Put the config to OEM which should be 01.  Then, disconnect the green plugs from the AUD.  Turn on the radio, you should still hear the sound from speakers driven by the IHU. 

So from the factory he had the speakers wired through the AMP. Doing your test, when disconnecting the green plug all speakers stopped working. 
Whats even funnier, i have dove deep into the connectors and wire diagram. 
As on the picture attached before you could see 4 pins in connector C and 4 pins in connector D.
So normally he have the front doors connected to C1/C9 and C3/C11 and rear doors to D3/D13 and D4/D14
When he changes from 01 Performance to 02 High Perormance he have to rewire the front doors to C4/C12 and C5/C13 to get it working.
1. Its weird that for this level audio he does have the AMP under the passenger seat and it is wired
2. Why it is wired using C and D connector for doors only. He does not have the D-pillar speakers.

So just FYI, there is also this kind of version that is mix of 01 and 02.

Anyway, after adding the SUB and turning it on, it does not work in any audio level 01/02/03/04, i thikn we have tried every possible audio config available in the orbit and it still doesnt work. At the end of the day we have tried shutting off the car for a while as per someone comment hoping it would go into the deep off state. But still no hope. 

Today VIP servis will be connecting to the car and taking a look, trying to turn it on. Fingers crossed but we have hoped that Orbit can do that too.

My last idea is that this is Volvo V60 2019 Momentum Diesel Manual. And the diagrams are for V90 so its possible that for the V60 there was one more configuration that is different than in v90. 
(he have tried with different AMP from another vehicle [V90] and everything worked the same way)