Edit: I should have written "flare".
So, my march toward improving my 2 way PA cabinets continues. My crossovers are in California waiting for a friend to bring them to the UK. My first Eminence PSD:2002 driver arrived and I unloaded the cabinets. I unscrewed the Motorola clone piezo from the flare, picked up the Eminence and ... it wont fit; close but no cigar. I don't know if its some kind of Chinese semi metric thread, but short of re-threading they wont go together.
That leaves me having to bin the flare and find something new. Flare terminology is outside my experience. I assume a 1" throat has a 1 3/8" thread? Dispersion: a 60X90 is the dispersion angle yes? For PA use I shouldn't imagine that I would want much height. For Horizontal is 90° about right?
As wide as possible? I might need to make a complete new front to get the hole right. Current Flare measures 390 X130mm (15 X 5").
Its all unraveling 🙁
So, my march toward improving my 2 way PA cabinets continues. My crossovers are in California waiting for a friend to bring them to the UK. My first Eminence PSD:2002 driver arrived and I unloaded the cabinets. I unscrewed the Motorola clone piezo from the flare, picked up the Eminence and ... it wont fit; close but no cigar. I don't know if its some kind of Chinese semi metric thread, but short of re-threading they wont go together.
That leaves me having to bin the flare and find something new. Flare terminology is outside my experience. I assume a 1" throat has a 1 3/8" thread? Dispersion: a 60X90 is the dispersion angle yes? For PA use I shouldn't imagine that I would want much height. For Horizontal is 90° about right?
As wide as possible? I might need to make a complete new front to get the hole right. Current Flare measures 390 X130mm (15 X 5").
Its all unraveling 🙁
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You may be able to thread the odd size horn on if you first heat the throat in boiling water, then with a torch to soften the plastic material.
A "60x90" horn is nominally the dispersion angle that the output level is -6dB from the on axis (0 degree) level.
What is "right" depends on the area you desire the horn to cover, and the dispersion of the low/mid driver at the crossover frequency.
The nominal dispersion angle of a horn may only hold true for a limited frequency band- the 15" X 5" 90x60 horn would probably only be near that dispersion above 2500 Hz.
A "60x90" horn is nominally the dispersion angle that the output level is -6dB from the on axis (0 degree) level.
What is "right" depends on the area you desire the horn to cover, and the dispersion of the low/mid driver at the crossover frequency.
The nominal dispersion angle of a horn may only hold true for a limited frequency band- the 15" X 5" 90x60 horn would probably only be near that dispersion above 2500 Hz.
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1 3/8" / 18 TPI is the only thread I know that is used for 1" screw on compression drivers. Screw on drivers and horns usually are at the lower end of the pricing scale and therefore they are not necessarily made to tight tolerances. That could be another explanation why it does not fit. I would expect Eminence to meet the thread specification and therefore suspect that the flare is off.
If I remember correctly, the 3" x 7" piezo-with-flare can be unscrewed, but does not have a standard thread.
If I remember correctly, the 3" x 7" piezo-with-flare can be unscrewed, but does not have a standard thread.
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Plastic has differing thread pitches based on the material's radial stress, expansion properties.
Draw a scaled [floor] plan view of your room/whatever to draw lines and measure the arc
Yes.
Height depends on 'crowd' depth with a cinema's 2/3 from the screen/sound wall focal point a ~ century's proven distance.
You’re the one with the Kappa 12” right?
I thought you also bought this?
H 290S - Horn Flares | Eminence Speaker
You can probably just put a ply over the old flare hole. Some pics would help us 😉
I thought you also bought this?
H 290S - Horn Flares | Eminence Speaker
You can probably just put a ply over the old flare hole. Some pics would help us 😉
I bought everything except that since I already had a flare. I didn't know that it didn't fit. They are also not available in the UK. Discontinued apparently.
I might try that heat gun idea though. 🙂
I made it fit.
Great let’s see some pics 🙂
I’ll just give you a heads up: the PSD2002 will take some time to break in but once it do it will sound great, before you might experience some artifacts. If there’s still artifacts after some time try to reverse polarity. Beware you probably want an L-pad too to lower the treble. What crossover plan do you have for the 4 ohm 15” kappa bass? They need high order due to the ugly peaks around 2kHz.
I’ll just give you a heads up: the PSD2002 will take some time to break in but once it do it will sound great, before you might experience some artifacts. If there’s still artifacts after some time try to reverse polarity. Beware you probably want an L-pad too to lower the treble. What crossover plan do you have for the 4 ohm 15” kappa bass? They need high order due to the ugly peaks around 2kHz.