Originally Posted by Soulburner
I was just reading about bass traps to reduce ringing and it led me to a thought regarding Rythmik servo subs.
If your subs are putting out sound energy with much less ringing to begin with, does that reduce your need for bass traps to "clean up"?
I'm not Rythmik, but here is the answer...
Ringing can be introduced by the sub system (combination of physical and electronic aspects) and/or room resonances (modes).
It certainly helps to start with a sub that doesn't create ringing, but a room will usually introduce its own ringing (not necessarily at the same frequencies).
You can combat room ringing by properly positioning multiple subs and/or using bass traps.
Also, it is often possible to electronically combat ringing by cancelling it out via room EQ.
For best results, use a combination of all the above.
With room EQ, in some cases EQing for a flat response will coincidentally cancel out some of the ringing. In some cases, room EQ makes ringing worse.
Fancier room EQ systems (Dirac, Trinnov, Audiolense, Acourate) will optimize both frequency response and impulse response and more reliably reduce ringing.