Speaker sensitivity

[thylantyr]

thread summary;

more is better

 

[future]

That is my case, I misspelled that because in portuguese sensitivity is 'sensibilidade'... And my english is not that good 🙂

 

[kelticwizard]

Re: Re: Speaker Array Sensitivity

"
An additional effect of the radiation mass is to decrease the resonant frequency of each unit as N is increased."

How pronounced is this effect in a practical sense?

Up until now, I always assumed that to maintain the F3 cutoff of a single driver in a certain size box, when identical drivers are added you simply multiply the box volume by the number of drivers.

However, if the resonant frequency of each driver drops the more drivers are added, then we can get away with a smaller size box than I originally thought.

Question is, how much smaller? Can we maintain the same F3 if we have four identical drivers but the box volume is only three times, not four times the box volume for one driver?

 

[phase_accurate]

I have once seen an EV datasheet for a P.A. driver where they stated tuning info for single- and double-driver reflex cabinets, taking the lowering of the driver's fs into account !

Regards

Charles

 

[planet10]

Re: Re: Re: Speaker Array Sensitivity

Up until now, I always assumed that to maintain the F3 cutoff of a single driver in a certain size box

Unless proximity is somehow mass loading the drivers the resonance should stay the same (and you would be trading lower fs for lower sensitivity).

dave

 

[Odio Yayakoshi]

Hi, guys. This is my first posting.
Thank you for your interesting opinions.
I would like to brief basic things.
The increase of SPL by parallel connection is one
that comes from half-lowered electrical resistance
(in the case of 2 units in parallel) and it makes loudness double.
While, another increase by multipling comes from the enlargement of surface which generates sonic wave.
But the loudness doesn't simply increase pro rata
with the enlargement.
Excuse me I repeat the matter of course.
I really appreciate being a member of this intriguing forum.

 

[7V]

It's good to have you here, Odio. I think that's a pretty good summary.

Steve