Is it possible to make add on cars have louder speakers like the lowriders/party bus?

Hello,

Just wondering if it is possible to add something to a carvariations.meta/carols.meta that would make the built-in radio louder for any addon vehicle, much like how the vanilla lowriders and party bus with speaker upgrades can be heard from much further away.

I had a look through the carcols for PRIMO2 (i.e. the lowrider version) and I couldn’t see anything under the ICE/speaker upgrades that altered audio volume (figured it may use something like AudioApply but for the radio).

Has anyone tried this or got it working?