Retrofit Subwoofer on High Performance w/o Subwoofer

[Pliind]

You did not mention if you have replaced your speakers or just the AUD.  The HK speakers produces much better sound than the HP standard ones.
The original HP (High Performance) comes with different variants (W or WO) SUB and Center speaker.
Having the speaker grill on the dash does not mean that you actually have the center speaker under it. There is a second small speaker there for car's system speaker that is common for all VOLVO models. Since the dashboard is exactly the same across all trims and 60 series, VOLVO fits a grill there covering the space.
Use plastic trim tool to pull up the grill and check if you actually have center speaker there.  If you don't, you will need to rewire it to the AUD. HK and B&W system must have the center speaker.


If you are interested,  I have a full HK set from S60 (same as V60) plug and play for sale. No flashing is required, just a config change in Orbit from HP to HP Plus.
1 HK AUD
4 Woofers (2 front doors and 2 rear doors)
2 MID (2 front doors)
4 Tweeters (4 Doors)
1 Center speaker with HK grill
2 Rear bench / back pillar speakers.

Hi!

All speakers are also swapped and all pins configured to HK spec. Wires for sub, center and headline are present and pinned in.