What are the specs of a full range speaker?

Ok so a woofer at -3db/30hz may be more ideal than a woofer that produces -1db/30hz's IOW one that voices too much bass of 30hz (-1db)is offering an out of balance image with the rest of the speakers drivers, correct?
I just looked up the db definition and finally have it some idea. What the link said that -3db is a lower volume level IN REFERENCE to the other hz's offered by the driver. ...and so, so forth.
Anyway I can now see how imprortant this db issue is on voiceing each specific range of hz's.

No one has commented on the 27.5 Hz A0 piano key. I say one can't bring the piano into the room unless your speaker can replicate all the notes with equal handling. That doesn't even take into account the sympathetic rumbling the A0 key excites in the piano structure.
Muralman1 (System | Threads | Answers)

Not to mention the pedal note that begins Sting's "Brand New Day". I know the CD has started when my windows start to shake. Couldn't do this with wimpy limited range 30hz speakers. :)

"Mdhoover are you saying is that if a speaker requires 6db of amp volume to produce the 20hz, its not near as efficient and accurate as the speaker that can hit the 20hz register at only 1db.
Correct?"
-Bartokfan

I hadn't thought of it in terms of required amplification volume, and cannot comment on that point. All I meant was that some speakers are flat or nearly flat at 20 hertz, whereas others might measure at minus 6 dB at that point. Clearly, if the stated measurements are even correct (see Hififile's post above), then the one that's flat down to 20 Hz has more bass.

I also don't know the precise relationship between loudspeaker efficiency and the associated frequency response curve.

In terms of accuracy, I've READ that frequency response curve flatness is not necessarily indicative of low distortion and/or high accuracy. That certainly matches my limited personal observations, and may be part of what Hififile's post is describing above*.

FOOTNOTE: In my case, the Paradigm Studio 100 V3 speakers seem to have had a very similar dynamic range to that of the Intuitive Design Summits, with the caveat that a killer DAC and better preamp are being used with the Summits. However, despite the perception of similar dynamic range--and therefore presumably similar frequency response curves--the accuracy of the Summits seems far, far superior to that of the Paradigms. (So does the imaging, high end smoothness and detail, and basically everything about them, for that matter. And I really liked the Paradigms--very excellent speakers in their own right.)

Md you lost me. back to the idea of full range, options/tradeoffs.

Mdhoover has a valid point. Your speaker is no good if it can do 20hZ whilst sounding terrible. There are lots of speakers that measure flat from where to where, all the while sounding dull, and lifeless.

Bartokfan, you touched on the same subject in your conversations with your speaker designer. In his designs, you give up some midrange fidelity by going to a bigger driver.

It takes a big speaker to bring all the decibels in full orchestra into play, not to mention the grand sweep of a symphony in full cry.