Hi Gents,
Came across the above speakers. What' s interesting is that the compression driver works from 300 hz - 22 khz connected directly without XO in way like FR drivers & the horn used is small so how do they manage to load the compression driver down to 300 hz . This is for their 12FH model.
Cheers
Came across the above speakers. What' s interesting is that the compression driver works from 300 hz - 22 khz connected directly without XO in way like FR drivers & the horn used is small so how do they manage to load the compression driver down to 300 hz . This is for their 12FH model.
Cheers
These ones?
The horn does not look big enuff to support 500 Hz let alone 200-300 Hz. Estimating the circumference suggests a 270 Hz max reach (surprising). The XO would be the 2nd order roll-off of a sealed box, but there will be issues with the too small a horn.
dave
The horn does not look big enuff to support 500 Hz let alone 200-300 Hz. Estimating the circumference suggests a 270 Hz max reach (surprising). The XO would be the 2nd order roll-off of a sealed box, but there will be issues with the too small a horn.
dave
Mmmh, lost half the message, but, hell, I just was afraid of the CTC and How I did it something similar - but-better by reducing CTC distance!!
Little 2" with sufficient stroke to support power, a shallow horn, yes_a WG- with the same dimension of the woofer
Little 2" with sufficient stroke to support power, a shallow horn, yes_a WG- with the same dimension of the woofer
BTW the coaxial compression driver reminds me the axial 2050 (... Follow me...) that is said to play down(and loud) to that frequency
Details are mentioned on their website.
diaphragm for the 300hz is 4 inches & 4.5 inches for 200hz. How can it be run XO less & on such a small horn is ????
diaphragm for the 300hz is 4 inches & 4.5 inches for 200hz. How can it be run XO less & on such a small horn is ????
Read carefully the big letters: "...horn speaker that PRACTICALLY does not require a crossover..." (from Tobian web-site). The devil is in the big details (letters)!
Also from the Tobian web-site: "5.0" inch mid-high compression driver". Yes, it is the Celestion Axi2050 driver - with similar misleading wording "No midband crossover required" (from the Celestion web-site). Of course crossover is required, and used in Tobian speaker!
Also from the Tobian web-site: "5.0" inch mid-high compression driver". Yes, it is the Celestion Axi2050 driver - with similar misleading wording "No midband crossover required" (from the Celestion web-site). Of course crossover is required, and used in Tobian speaker!
Am I misinterpreting this :
it has always been my wish to develop a real two-way horn speaker that practically does not require a crossover in the mid-high range from 200Hz to 20KHz.
it has always been my wish to develop a real two-way horn speaker that practically does not require a crossover in the mid-high range from 200Hz to 20KHz.
2nd order acoustic from the sealed box plus a single cap i suspect. 3rd order. Plus the response, no longer suppoted by the horn, falls off the cliff.
dave
It means that he don't want to put crossover between 200 Hz and 20 kHz. But he must put crossover at 200 Hz!
In reality, Celestion Axi2050 can be crossed at 300-400 Hz, for domestic hi-fi use only. 200Hz crossover is out of question!
So its is still like full range with no XO in way frm 300-20khz. The other riddle is how he got away with being able to use such a small horn be it a CD or a Horn.
Ehm, you mean WG not CD, as constant directivity might be reached with a particular geometry of the horn and aided (often with simple parallel RC in series with the signal) via crossover to help with the falling HF response.
It's not 'snake oil' what it's written on the website, just look at the products and how they are targeted...
It's not 'snake oil' what it's written on the website, just look at the products and how they are targeted...
Oops my bad yes WG. Regardless its rather intriguing that the designer has managed to accomplish this. Again if you read what designer says no XO in way
for the compression driver. Well guess that's why the speakers aren't cheap. lol
for the compression driver. Well guess that's why the speakers aren't cheap. lol
well i've looked pretty thoroughly and can't find any such claims or statements could you supply a link?
or are you expressing wishful thinking....
or are you expressing wishful thinking....
what makes you so certain that that's where it's crossed? there no mention whatsoever of crossover frequency just an overall bandwidth.
"it has always been my wish to develop a real two-way horn speaker that practically does not require a crossover in the mid-high range from 200Hz to 20KHz."
if the drivers have rolloff characteristics that are good compliments of each other then i agree that a "minimal" X-over can succeed in sounding good but at what frequency that occurs would largely depend on the drivers,no?
and with no details your merely making a conjecture that's uncorroborated.
i personally will put forth my own conjecture...that they have a xover frequency between 800 to 1K and either first or second order to me that would reconcile with the statement " two-way horn speaker that practically does not require a crossover "