A full range speaker?

Tricky and interesting question. I'd say 25Hz at -0dB at least. And why is because when I added subs and EQ'd it carefully it plays near flat 200 down to 25Hz now (no lumps). I hear things in recordings I never heard before, and that is always great.

Because of DBA I will always say more subwoofers are better (all turned down low). But I believe that in terms of frequency reproduction and deep low bass, there are flagship products, Wilson, Magico, et al, that I would consider full range (knowing add'l subs would aid low end quality).

My DIY fully horn loaded speakers uses Bill Fitzmaurie designed HT Tuba folded corner horn subs, quarter wave horns turned to 25 Hz.  Output measured at the listening position with my trusty Radio Shack SPL meter of the DSPed system (DEQX) shows the output at 25Hz to be identical to the output of the 1kHz reference tone.  Roll off below 25Hz should theoretically be at 18dB/octave but is in fact a bit steeper than that. 
The subs are 2ft.X3ft.X3ft. or 18 cubic feet.

After trying various types of wide band as a  low bass-  lower highs driver,,,I've just ordered something I think will put my speaker in the ball park of  true full range
W18's as bass modeuales, 40hz-1200hz
DavidLouis 6.5 , 80hz-,,who knows, maybe like 12khz rolloff
and a Seas Crescendo running,,like 4khz-say,,who knows maybe  15k+ hz.
There is alot of over lap  between the 3 drivers,. 
For me thats ok, as long as all3 have quality musical reproduction. (= no coloration/no muddy mids/no fatigue)
Think of it as a  sort of **LIne Array**
And this set up is friendly to whatever amplifer of your choice. All are 8 ohms, easy load. 
I'm running a  DL 4 incher, and have pretty good results. Female voice accurate. 

@mortzartfan

How many W18's?

Active or passive XO?

william53b OP159 posts07-30-2021 8:13am@mortzartfan

How many W18’s?


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Dual, thats 2 per channel.
sens is 86 db, very low,
which is why Seas uses 2 per channel,
They use the E001 and not the EX001.
I would rather have the EX001 fora few $’s more, bigger magnet, = more kick in low bass.
I guess they wanted a balance (E001 more recessed bass vs the EX001), competeing  with the single Millennium tweet.

Best bang speaker would be
Dual W22 EX’s per channel, + a Crescendo = a Super Thor.
The Crescendo is far superior to the old Seas Flagship the Millennium. For same price. 
I have a single Crescendo now, , so that project is on hold til I find cash for a  second unit..
 which i will be running with a 8.2 cap, = 3200hz.
The W18’s roll off at say 1600hz
So the 1600hz-3200hz will be carried by the davidLouis 4 inch wide band,,which rolls off at say 80ish hz and maybe like 10k-12khzish,,Not sure.
But definetly has some highs.
bass not bad for a lil 4 incher.
Mids, all there, with vocals very accurate.
hardly any coloration/distoryion,,so fatigue is never a issue (no resonances due to some treatment on the paper cone material, = does not have a paper composite sound, not at all.
Its 91db.
How it compares to its bigger brother the 6.5 incher,,will soon know late this week. when it arrives via Honk Kong seller.
I am expecting alottt more bang out the 6.5,,as a 4 inch cone is very tiny = can’t really open up on bass.
So here is the 4 in action, no tweeter and forgot to unplug one channel’s W18’s.
Still you get a good idea of the voicing of this lil guy
Wilson offers a $960k signature speaker,w hich clarly beats out this oil 4 inch wide band.
However if I hear even the slightest coloration in any of Wislon’s mid range fq’s. Then I’ll have to say, this lil 4 inch beats Wislon in the fatigue category.
This is the problem with any speaker trying to acheive all fq range, price no object.
My tech friend has the Rat Shak Nova 7B’s with the paper composite cones, He loves his Noa 7B’ s stacked...I HATE anything paper, if its not treated with some coating. Even witha coati9ng it brings back old feelings from speakers of the 1970’s.
A sound I wish to be as far away from as possible.
Which is why I luckily went with magnesium, = Has no lower bass/lower mid resonances that I hear in paper.
I believe Scanspeak in the Wilson’s are paper composite. And for this reason, I could never live with any of the Wilson line.

I get the feeling

*Been there done that**
I do not need crystaline highs,,, deep rock solid bass.
In the Wilson’s you get both.

Thats not what I am after.
My goal has been to try eliminate as much coloration as possible hopefully resulting in as close to zero fatigue as possible.
I am getting closer and closer to this goal, with the DavidLouis 6.5 + Crescendo.

The Crescendo Project is a ways off. Short on cash right now..

https://www.youtube.com/watch?v=aUYOwY8yNPc