Design: Horn High Sensitivity Speakers

[Helmuth]

Frontloaded bas horn. lowcost. beyma sm115n

2pi halfspace. 103dB 1Wmtr

Inside size 40X50X120cm.

 

[Helmuth]

same simulation 1pi. I would say this would be maybe the result when place in a corner. 107dB 1Wmtr.

 

[Helmuth]

Eminence kappapro15A wow what a great 15"!

2pi halfspace very lineair and 105dB 1Wmtr

1pi 109dB/1Wmtr

http://www.eminence.com/pdf/Kappa_Pro_15A.pdf

 

[tinitus]

that sure is a mighty big midrange

try this one

http://www.faitalpro.com/products/files/12FH520/8/12FH520_datasheet_8.pdf

or this

http://www.faitalpro.com/products/files/12HP1010/8/12HP1010_datasheet_8.pdf

 

[Kindhornman]

Tinitus,
I thought that was a new kind of inverted dome tweeter.......

 

[Helmuth]

To reduce volume of the box here with short midrange horn on the eminence kappapro15A.

system volume 124liter.

Spl for 2pi and second 1pi.

 

[Helmuth]

A big midrange,

Thats right Charly chile can use this as a midrange on the low power tube amplifier, so he has the entire focal range through a horn and he than uses the 20W to power the subwoofer.

 

[Helmuth]

the kappapro is a nice driver to play with in simulation, now made a simple conical horn on it with bas-reflex loading.

to make some thing like these.

An externally hosted image should be here but it was not working when we last tested it.

SPL output for 2pi and 1pi placement 1pi. And reasonable size 128 liter 4,5 cubic feet.

Combined response port next to horn mouth.

 

[tinitus]

why vented BR if it still needs a sub ?

wouldn't closed/apperiodic make integration with a sub easier ?

 

[Helmuth]

why vented BR if it still needs a sub ?

To increase efficiency and bandwith. 105 dB 1wmtr 1 driver is very nice. 20% efficiency if i am not mistaken. A hifi speaker can not even make a 0,5% efficiency.

It wil make a perfect high efficient 2 way with a midhigh horn 500Hz-20kHz where time alignment is right.

It is not to bulky big can look very good with a tractrix horn on top.

Now only a tapped sub horn is needed.

wouldn't closed/apperiodic make integration with a sub easier ?

I believe I already showed that solution.

 

[Helmuth]

You can make this in 1/3 of that size.

Altec A7 is 97db 1Wmtr. 3% efficiency huge difference With the 20% from the simulation.

 

[Elias]

a nice 10" of PHL-audio.

It's a shame PHL never publish any graphs of their drivers. I mean, look at their datasheets layout they even have an empty place for the graph but they dont publish !

I think they have lost many DIYers buying their drivers because of this.


- Elias

 

[Helmuth]

It's a shame PHL never publish any graphs of their drivers. I mean, look at their datasheets layout they even have an empty place for the graph but they dont publish !

I think they have lost many DIYers buying their drivers because of this.


- Elias

Your right elias.

 

[Elias]

Looks like a crystal filter rather than something I would like to use for audio

 

[Helmuth]

PHL drivers.

 

[Helmuth]

and the last two.

 

[tinitus]

To increase efficiency and bandwith. 105 dB 1wmtr 1 driver is very nice. 20% efficiency if i am not mistaken.

nice, but at a cost

wasnt it his intention to use very small amps, or even small tube amps ?

efficiency and sensitivity is ofcourse nice for small amps
but how much do you really need

in any case, if the goal is high SPL and playing very loud I see no point in using small amps
so I would say for the smaller amps a more 'moderate' SPL ought to be ok

or in short
even a big high efficient speaker system can still be a heavy load for a small tube amp, right ?

 

[Helmuth]

Looks like a crystal filter rather than something I would like to use for audio

filter it 4 order 1khz or 1,5khz, no higher harmonics due its own bandpass behavior.

 

[Helmuth]

nice, but at a cost

wasnt it his intention to use very small amps, or even small tube amps ?

or in short
even a big high efficient speaker system can still be a heavy load for a small tube amp, right ?

Why do you think that?

 

[Elias]

that sure is a mighty big midrange

try this one

http://www.faitalpro.com/products/files/12FH520/8/12FH520_datasheet_8.pdf

Looks like very well behaving driver above 1kHz (if the spec is to trust)


- Elias