Phase-locked loop subwoofers

[Silverprout]

Hello,
Can anyone explain why manufacturers do not use more phase-locked loop circuits principle in order to have a coherent global phase matching ?
Is there any commercial stuff that use this design ?

 

[tesseract]

Hello, Silverprout. Would this audibly improve subwoofer performance?

 

[Silverprout]

Hello,
Perhaps, i'm curious ! (and sorry for my english)
the impedance coupling to the room air volume (shape, size and surfaces) charateristics is barely everything.
i've wasted a lot of time by performing equalizaton experiementations of on a randomly placed subwoofer, a bad impedance coupling will transform any equalization into unefectively wasted energy.

You are not constrained to read the lines surrounded by ***
***if there are membrane to the air relative impedances mismatches, the mechanical energy transmission to the air will not occur and the loudspeaker will move and consume the energy for nothing at all, except agravating the room resonances and raising dramaticaly the loudspeaker driver THD***

I'm curious to know if manufacturers take account of energy efficiency (we are in 2017, and we try to save the humanity by reducing its energy impact on its envionement) by limiting power consuming useless frequencies that are uncoupled to the room (and therefore inaudible) by identifying them and kill them in the soup of reverberations.

Or that the global commercial and technical strategy is only based on the customer satisfaction, and this mainstream customer love to see his subwoofer membrane moving hard and fast for nothing at all, wasting energy for nothing in order to hear nothing accurate?

 

[Tony V.]

This goes into an area I cant really be helpful on but the deficiency of the amplification being most manufacturers are using a digital amp now may not be as relevant as it was in years past. Its proven already that a digital amp (Class D) are very capable.

 

[Silverprout]

This goes into an area I cant really be helpful on but the deficiency of the amplification being most manufacturers are using a digital amp now may not be as relevant as it was in years past. Its proven already that a digital amp (Class D) are very capable.

Yes, digital amps and digital filters opens a new era in term of optimisations, but the automatization of this optimizations seems impossible and only few people will benefit from this advance (very, very few)