Max db at 20hz?

[Jean-Marie]

I realize that when Devialet advertises Phantom Gold/Silver/White as producing 108/105/101 db, they are not referring to the bass spectrum at 20 hz.  Anyone know what the figure would be at 20hz?  More a curiosity than anything.

Thanks.

Can anyone remind me, at which numbers on the Spark volume indicator, do the low frequency's starts rolling off  slightly? Think it's 65 or 70 but can't quite remember. 

I think it is earlier than that because to my knowledge, 70 is 0dB attenuation. So if your source file goes up to 0dBFS, going higher than 70 will start soft compression, exactly like on an expert if you listen with a volume of +x dB. 

Jean-Marie