Systems utilizing passive radiators ARE, "vented" systems. The Thiele-Small parameters and calculations, are identical for both. Only the application(vent or radiator) of the results(mass of port air/size and weight of the radiator), varies. https://itstillworks.com/size-speaker-enclosure-passive-radiators-7918995.html "Tighter" bass can be realized, by adding weight to the radiator(s).
Why so few speakers with Passive Radiators?
Folks,
What are your thoughts on Passive Radiators in speaker design?
I've had many different speakers (and like many here, have heard countless varieties outside my home), from ported, to sealed, to passive radiator, to transmission line.
In my experience by far the best bass has come from the Thiels I've owned - CS6, 3.7, 2.7 which use passive radiators. The bass in these designs are punchy yet as tonally controlled, or more, than any other speaker design I've heard. So I figure the choice of a passive radiator must be involved somehow, and it makes me wonder why more speaker designers don't use this method. It seems to give some of both worlds: extended bass, no port noise, tonally correct.
And yet, it seems a relatively rare design choice for speaker manufacturers.
Thoughts?
What are your thoughts on Passive Radiators in speaker design?
I've had many different speakers (and like many here, have heard countless varieties outside my home), from ported, to sealed, to passive radiator, to transmission line.
In my experience by far the best bass has come from the Thiels I've owned - CS6, 3.7, 2.7 which use passive radiators. The bass in these designs are punchy yet as tonally controlled, or more, than any other speaker design I've heard. So I figure the choice of a passive radiator must be involved somehow, and it makes me wonder why more speaker designers don't use this method. It seems to give some of both worlds: extended bass, no port noise, tonally correct.
And yet, it seems a relatively rare design choice for speaker manufacturers.
Thoughts?
Showing 3 responses by rodman99999
Legend- With a little research, you’ll find that both a properly designed/implemented radiator, and the mass of air in a vent, act as resonators and reinforce the system's TUNED bass response. Below the tuning point, yes- cancellation occurs(and is irrelevant). That understanding should remove the why and how. Third subject, here: http://audiojudgement.com/bass-reflex-speaker-design/ Then: http://www.accuton.com/en/technology/passive-radiator/ |