Welcome to the new Single driver, Wide-bandwidth speaker circle

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planet10

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a) They typically cover approximately 7 or more octaves of the audio spectrum within approximately a +/- 6 dB range.  Typically something that handles between 40 and 100 Hz on the bottom end and approximately 14k or better on the top end

Just to be picky, 7 octaves up from 100 Hz is (100>200>400>800>1.6k>3.2k>6.4k>12.8k) is 12.8 kHz. 7 octaves from 40 Hz is 5k, 8 octaves is 10k.  9 octaves from 20 Hz is 10k.

The definition allows a driver to fall short by 2 and a bit octaves on the bottom, but only a 1/2 octave on the top. Drivers like the Pioneer B20, Goodmans Axiom 201, & Fostex FE207e don't qualify. Neither does the Radio Shack 40-1197 that got a lot of us started. Most of the 3" full-ranges fail to make the grade. If you go by Martin King's on-axis measures the Lowther DX2/3/4 don't qualify either (which probably means most Lowthers don't qualify). http://www.quarter-wave.com/Project04/Measurements.html

IMHO definition is still too restrictive.

dave

jrebman

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Mike,

I split your Abby thread off into it's own topic as it was taking on a life of it's own and was straying a bit far afield for the intro sticky.

-- Jim

chrisby

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Jim - my belated thanks for resurrecting this forum

the "compromises" proscribed by wide-bandwidth speaker systems,( for many of "us" frequently in combination with low powered SET amps)  brings to mind the following sentiments, recently and beautifully stated by Michael Lavorgna at 6-Moons:

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Further, the attempt to apply that which we can measure (sound) to how we experience (music) is a faith-based application of science at best and flies in the face of the unrestrained listening experience. Yet by abandoning this quest for objectively better hifi performance, we have not abandoned the quest for higher fidelity as our passions drive some of us to a more and more musically engaging experience. With hifi we strive to create, not recreate, a musical event - inside ourselves.   In this sense, 'fidelity' refers to our hifi?s ability to trigger a musically engaging experiencing. Or if you prefer, we should recognize the fact that the value of music played through a hifi only becomes measurable once it hits our imagination.




http://www.6moons.com/audioreviews/roadtour19/roadtour19.html



jrebman

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Chris,  Thanks for poking your head in here and I sure hope we hear more from you.

Well, to my mind, Michael has hit the nail on the head, and absolutely beautifully.  But he's another N.J. guy, so what do you expect :D.

I was going to bring up this topic in some guise, and maybe I will and will start it with Michael's quote.

Truth and beauty -- the audiophile's dilemna.  I know where I stand.

Know anybody looking for some fonkensteens? :D  Love 'em an awful lot but really need to get with the higher efficiency thing.  You built one hell of a speaker here and people still remark about how beautiful they are and how "real" they sound.

-- Jim

chrisby

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Chris,  Thanks for poking your head in here and I sure hope we hear more from you.




as my wife would say - careful what you wish for


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Well, to my mind, Michael has hit the nail on the head, and absolutely beautifully.  But he's another N.J. guy, so what do you expect :D.

I was going to bring up this topic in some guise, and maybe I will and will start it with Michael's quote.

Truth and beauty -- the audiophile's dilemna.  I know where I stand.



this of course could be a Pandora's box, and here's a few random thoughts on opening the lid:   

"you can't handle the truth" - (i.e. that there is no single one?

"beauty is in the eye (i.e. mind) of the beholder"

All sensory input is simply data until processed by that amazing piece of wet-ware inside our skulls. Some of the programming is genetically "hardwired" and for the most part universal and constant,  other is far more dependent on an individual's lifetime accumulated experience - which adds rather a considerable degree of variability.   


Every time I read the words truth and beauty in the same sentence, I'm reminded of my favorite family friendly Zappa lyric (there aren't too many of those on this album) :

Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
Truth is not beauty
Beauty is not love
Love is not music
Music is the best...
Wisdom is the domain of the wis
(which is extinct).
Beauty is a french phonetic corruption
Of a short cloth neck ornament currently in resurgence*

Hard to believe that was 30yrs ago - time to tune up the air guitar for another imaginary guitar solo



(* I still have pictures of the ridiculous brown & white polka dot bow tie and window pane linen wide flair pants I got married in)




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Know anybody looking for some fonkensteens? :D  Love 'em an awful lot but really need to get with the higher efficiency thing.  You built one hell of a speaker here and people still remark about how beautiful they are and how "real" they sound.

-- Jim


PM sent on the last item

ejfud

Looks like I'm the new facilitator here. I have a few ideas on getting more traffic here, but welcome anything you all would like to see.

I've made the "Share pictures of your fullrange speakers thread" a sticky to keep it up top and so people just dropping in can have a look at some your very cool builds. I'll be adding a few more in the next few days. Please post in them as you see fit.

Thanks

Freo-1

Looks like I'm the new facilitator here. I have a few ideas on getting more traffic here, but welcome anything you all would like to see.

I've made the "Share pictures of your fullrange speakers thread" a sticky to keep it up top and so people just dropping in can have a look at some your very cool builds. I'll be adding a few more in the next few days. Please post in them as you see fit.

Thanks

Thanks for taking the mantle. 

I'm curious about these speakers.  I've always stayed away from them, as I could not work out how  they cold provide full frequency reproduction in a balanced manner.

However, some of them must do a pretty good job, or people would not be using them.  So, look forward to getting educated on these types of speakers.

What are some recommendations for research?


ejfud

Thanks for taking the mantle. 

I'm curious about these speakers.  I've always stayed away from them, as I could not work out how  they cold provide full frequency reproduction in a balanced manner.

However, some of them must do a pretty good job, or people would not be using them.  So, look forward to getting educated on these types of speakers.

What are some recommendations for research?

Thanks, should be fun. I've been messing with single drivers for years and love them.

Check out this thread for some ideas and search from there.

http://www.audiocircle.com/index.php?topic=76975.0