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In the Forum: Horn-Loaded Speakers
In the Thread: Problems with horns: upper bass
Post Subject: Re: Upperbass for you? Or me?Posted by slowmotion on: 5/23/2006
 Romy the Cat wrote:
slowmotion,

I think the ultimate length of the upperbass horn is 3”- 4” throat. With longer horn it would be very complicated to time-align it as the horn will mask out the MF driver. The ultimate driver for upperbass should be a compression driver, low to medium flux, with no face plug, most likely with aluminum cone and resonant frequency ~20-50Hz below the horn rate. I personally do not know such a driver, if someone do then let me know….

The Cat


Depends on which way you want the horn to work, I think.
I am at the moment trying to think about these things without "thinking" about them, .... , no that doesn't make any sense....

3" - 4" throat, could be, but from there you can go in many directions....
I am in a way less bound by these things than you because i make the compromise of using a digital crossover. So I can try to optimise each horn in its intended passband, thinking more on each horn than was possible before.

Also I consider the flare type of the horn to be free for experiments, one may even make 2 or 3 segment horns with different flares in each segment.
This is not so easy to get right....

I have earlier stated that I don't like conicals, so I won't go there.

To the point: IMHO the horn should be free to work AS A HORN in the intended passband. If one can't do that , it might be "better" ( one might get better results ) to go to other kinds of enclosures. With the neccesary membrane areal. A different route alltogether.
An ideal proper horn will ( we hope ) load the driver mainly resistive in the intended pass band,
so we can then use amplifiers with a damping factor of 1, with good results. But that's another story....

cheers Wink

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