AFMG Network Forum

plus or minus · Member

OK, this loudspeaker data thing has got me really confused - I am sure somebody can explain and I am also confident that it is something straightforward but I am an idiot (of sorts...)

So, why is it that all (or most) the loudspeaker manufacturer data is flat? To me this can only mean one of a couple of things:

1. I am meant to download the spec sheet from the manufacturer and insert the peaks and valleys until the spectrum (in the properties box) looks right for SPL@1W,1m - then I can change power or SPL for ALL frequencies by the same amount. I find this option quite implausible though considering the amount of time it would take

2. It is assumed that somebody in the real world would eq the system so that the loudspeaker spectrum is flat, therefore you can leave it flat in EASE - this is totally implausible but I am putting it in here for giggles

3. I am missing the fundamental point of these properties - this is certainly the most likely response

4. The manufacturers were lazy but this is doubtful

The way I see it, if the spectrum input was that data as measured 1W/1m over the entire spectrum, I should be able to just increase Electrical power to required amount and not even have to mess with SPL data - i.e. the work should be done at the "simulated amplifier" in the properties tables (adjusting all frequencies by the same amount). Now I know that you can simply increase power equally over the entire spectrum but the issue I am having is that just about every speaker I load has a flat (or close to which I know isn't correct) response and therefore it means to create a "real" loudspeaker response, it requires different amounts of power input at different frequencies - this is ridiculous and not possible in the real-world (assuming a single driver).

Therefore, I already know the answer is that I have not understood the meaning of the loudspeaker data properties in EASE so somebody please clear this up for me.

Also, really quickly, if somebody can also tell me how to take the data changes from one loudspeaker and assign it (quickly) to other speakers (or all speakers), that'd be good. When using the "change to all" function in the mouse menu, it only changes the loudspeaker model but not the power properties. I am sure there is a quick function for this but the EASE manual is pretty bare in actually explaining how to use the software (in my opinion).

Long first post, sorry everyone.

Bruce · Member

Bruce · Member

plus or minus · Member

Thanks Bruce.

I guess what I meant was that it is implausible to think a 1/3 Octave graphic eq can flatten the reponse of a loudspeaker with peaks and valleys in narrowband.

Which again leads me to confusion on how EASE is working behind what you can control:

-If the loudspeaker data is inserted in narrow-band (I assume it is) and I control the 1/3 ocatave eq simulator in the power section to make a loudspeaker flat, what happens in the sinusoidal calculation in mapping (as opposed to 1/3 Octave). In other words, how much can I trust even doing a narrowband analysis (or is EASE taking care of all of this in the background - i.e. the loudspeaker response isn't actually flat even though my 1/3 power spectrum makes it appear so in the properties box).

I guess what I am really getting at is the ability to check a loudspeakers response in EASE in narrowband. Not for control (because that would be implausible) but for informational purposes.

If the loudspeaker data is only inserted as 1/3 Octave (I am not assuming this), then I don't see why the narrowband analysis is there.

Ron Sauro · Member

"If the loudspeaker data is only inserted as 1/3 Octave (I am not assuming this), then I don't see why the narrowband analysis is there."

EASE can also use GLL data that is measured at very high resolution and can then display narrowband information. SpeakerBase does not have this capability