help to understand BOOSTER coding value(G30 530e id7 HK audio)

[veritasjk]

Hi, All,

I have 2020 530e MSP with HK audio

couple days ago, I got one coding value which can change BOOSTER's value, and I know new id7 change to RAM with Booster for subwoofer under the seat or outside of speaker(I don't know what this means)
[img=0x0]https://www.bimmerfest.com/attachments/1635470767186-png.1044126/?hash=279d5df52e2f1e1b325a7ee69a3766d4[/img]


which is like this and value can change 00, 01, 02 (Default is 00 - double checked with my original backed up CFID)

-<group id="3002"><function comment="BOOSTER_VARIANT" mask="00000111b" end="30" start="30">02</function></group>

and guy who told me this coding value he said 02 is more powerful bass and clear high


but I searched in internet and other post said
Booster variant 1 = Used to power additional speakers in HK setup
Booster variant 2 = Used to power additional speakers in B&W setup

my real question is
1. what exactly this BOOSTER value can do? increase AMP power to speaker?
2. if HK audio is installed, value 2 can kill speaker due to over power?
3. if this is powerful coding function, why default value is 00 for HK audio installed, BMW factory setting did not mind at all??  or 

if some knows about details, please share some idea

Thank you