Cab and driver frequency response

[georghunor]

My band plays metal in drop "G" tuning my lowest string is tuned to G-0 which is 24.499Hz. If the usable frequency range of the cab is 30Hz-20kHz (as your Big Twin 2) then playing an open "G" string is below the response of the cab. In a case like this I can hear the note being played, but what am I hearing the resonant octave? Fifth? Fourth? I have searched for cabs and drivers and most bass cabs and subs cut off at 30-40Hz. Is there a point to tuning that low if the cab is not actually producing a note at that frequency? Do you have a recommendation for a Bass cab? I am using an Acoustic 300watt bass amp that works fine for most gigs and larger venues use the "DI" port to the main PA. But, even there, if the PA subs don't respond to that low frequency, what sound is actually being heard?

 

[Rick James]

if the PA subs don't respond to that low frequency, what sound is actually being heard?

Harmonics. They account for at least 75% of what you hear.

 

[Downunderwonder]

Ampeg fridges don't make any appreciable 40hz. They're still selling.

 

[domonic]

Missing fundamental - Wikipedia, the free encyclopedia

A low pitch (also known as the pitch of the missing fundamental or virtual pitch) can sometimes be heard when there is no apparent source or component of that frequency. This perception is due to the brain interpreting repetition patterns that are present

 

[Johnny Crab]

What demonic said.
The Line 6 HD500X here tracks bass VERY well and one patch is specifically set up to one octave down so I don't have to carry a 5 string bass for 3 songs we "might do" out of 400 songs. It is always amusing to watch the soundman and/or musicians faces when that patch is tested. The poor little BOSE boxes cut off sharply at 40Hz but the brain makes it seem that they are going much lower.

Missing PA support and wanting to exceed with excess, you always could get the Bugera monster bass head that has an internal crossover and 2 amps and a PA sub. It's my "don't trust the soundman" rig of choice OR if we are outdoors with no PA for bass use.