Atmasphere:
Are you saying that an amplifier will have to have fixed current to sound good on horns ... ?
So any amplifier with transformers should work IYO ..
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Hello AL,
No your calculations are off the distance increase is 4M making the reduction 24 DB for a total of 76..
Regards, |
Is it really necessary to achieve potentially hearing damaging levels of 100db and higher to fully enjoy one`s home audio system? I don`t believe people have to mimic ultra high and uncomfortable sound pressure if they have a reasonably quality system with very good musicality and resolution(and want good hearing a few years down the road).
-06-24-11: Charles1dad
Hello Charles1dad, IMO, usually speakers that lack dynamics and or have uneven power curves tend to sound at there best "loud" ...
For the most part all amplifiers tend to sound there best when run at no more than 33% of rated output, we need a lot more power than most would think to recreate live ( not SPL ) but realism of sound ...
regards,
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06-24-11: Timlub
I haven't read all of these post, so it might have been answered...The answer to the exact question is yes.... In theory. If all things are totally equal except for sensitivity, the two speakers will sound identical except in the area of dynamics. The more sensitive speaker will be more dynamic. Next... This is impossible
06-24-11: Timlub
Will have to disagree more sensitivity does not mean more dynamics...
regards, |
Anything scientific to add macrojack?....thought so, this is not about horns vs the world , so no need for your insecurities to fly !!!
We are discussing sensitivity more over i'm trying to point out it is not as simple as comparing the published numbers, but what we really need is to determine what is low/med/high sensitivity.
Eg: is it ,
low ... Below 86db/w/m
Med..... Below 96 db/w/m
high ... below 106 db/w/m
Then we will now have to determine, direct radiator, waveguide,planer/linesource, conical horn/hybrid, full conical horn system.. et al ...
Then there is application .. easy as most if not all are discussing domestic listening environment, so your auditorium straw argument wont fly and is not necessary.
Then there is impedance magnitude and phase, critical in determining how we are going to drive the beast..
Fact is most planer/linesource will easily exceed 100db in most listrening environment as will some of the larger direct radiators, so there is no shortfall in the domestic environement when it comes to dynamics, regarless of weapon choosen, of course amplfication for the application will have to be correctly choosen, that's academic.
So IMO sensitivity numbers by themselves does not a better speaker make ..
regards |
Yes Timlub,
Sorry i had misread your response, all things being equal and exact it will have more dynamic range...
regards, |
These kind of discussions would have more weight if we were to quantify what is high sensitvity, medium and low ..
A horn speaker with a sensitivity of 100db/w/m being driven by a 20w SET, will have far less db gain and dynamics when compared to a planer speaker with a sensitivity of 86db/w/m being driven by a 200 watt amp @ a listening distance of 15 ft.
regards, |
Note:
OP had used the word efficiency, but it was obvious he mean't sensitivity..
regards, |
Hi 06-26-11: Charles1dad,
err no ...
regards, |
Hello Unsound,
@ 15 feet the 100db/w/m horn would have an out put of 76 db/w the planer would have an output of 74db/w, what is it you want me to refigure ...?
regards, |
OK as i had mentioned manytimes before we need to give an REFERENCE when we are determining sensitivity each meter represents a 6 db drop for the horn as opposed to to a 3 db drop for a planer/ribbon/ESL linesource.
We cannot compare Sensitivity without setting parameters ,giving references and comparing apples.
Regards, |
Hello Charles1dad,
To achive 94 db@5M the SET.horn combination in my eg would require 64 watts from it's 20 watter, the planer approx 90 watts from it's 200 watt amp.
Also to achieve realistic size, dynamics and lowest distortion( not just the loudest spl) we have found most amplifiers give there best presentation @ approx 33% of rated output. ( avg Din)
Regards, |
Ahhh Charles1dad,
A cylindrical horn does, it is the same as a linesource, unfortunately some call small waveguides horn and there qouted sensitivity is misleading ...
My Point;
We have to be careful when we compare speakers and there listed sensitivities....
regards, |
Also in a system where the bass driver is loaded directly to the room, the drop off between both drivers are different in the critical lowmid/midbass region .
When purchasing such an hybrid setup system listening distance is very important and should be noted...
regards, |
Hence the 3 db drop of per doubling would only apply to the Conical upper midrange/high horn and not to the system as a whole with these hybrid horn systems...
regards, |
Hello Al,
Per meter = doubling of measured reference distance..
regards, |
AL,
Yes 15 db down not 24 , my apologies guys ..... |
After the correction the linesouce in the eg would not give anything up to the SET setup and will still have more dynamics..97/99
Regards,
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