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UHF driver selection suggestions and thoughts? [message #43657]

Wed, 14 January 2004 14:54

Magnus
Messages: 32
Registered: May 2009

Baron

My current system uses an Eminence Kappa 12 woofer and a P. Audio BM-D440 (1 inch, titanium diaphragm) on a B&C ME45 exponential horn. Despite top octave compensation I still find the sound somewhat lacking in the HF range above 10 kHz. Not really the "sparkling" sound i happen to enjoy. (But they do sound good). So I added a pair of KSN-1005 crossed in at 10 kHz which helped a lot. (Yes, you heard me right, the KSN-1005! They do not sound all that horrible above 10 kHz...)

However, I am looking for higher quality drivers. Here is a list of different drivers I have been eyeballing so far:

"Bullet"
Beyma CP16
Beyma CP22
Fane HF250
P. Audio PST-555
JBL 2402 (WAY too expensive...)

"Slot"
Beyma CP21/F
JBL 2405 (again, out of the question.)

Experience with any particular driver, other suggestions or general thoughts are welcome!

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Re: UHF driver selection suggestions and thoughts? [message #43658 is a reply to message #43657]

Wed, 14 January 2004 15:02

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

I've used the JBL 2405 a lot, and I really like it.

That's the one that gets my vote.

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Slot vs Bullet [message #43659 is a reply to message #43658]

Wed, 14 January 2004 15:21

Magnus
Messages: 32
Registered: May 2009

Baron

Wayne,

I have no reasons to doubt that the JBL 2405 is a great part, but at the moment JBL parts are just way too expensive for my budget.

Do you like diffraction slot drivers because of their wider dispersion or simply because they sound better?

/Magnus

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Re: Slot vs Bullet [message #43660 is a reply to message #43659]

Wed, 14 January 2004 15:41

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

I like the JBL 2405 first and foremost simply because it is a great sounding driver. The fact that it has a wide horizontal pattern and narrow vertical is a bonus, since that's where the energy is most useful. But to be honest, the pattern is a little wider than I'd like and its frequency range makes it impossible to use with the speakers I make these days. I'm more into uniform directivity and these require too high a crossover point for that philosophy, making the vertical null angles too narrow. But the driver itself is very good sounding to me, and for speakers that aren't designed for a uniform 90x40 pattern, this is an excellent choice. When compared with a bullet driver that has a round pattern, at least the 2405 has limmited vertical dispersion, which is a good thing in my opinion. One surely doesn't want celing slap from a tweeter with a tall vertical coverage angle.

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Re: UHF driver selection suggestions and thoughts? [message #43662 is a reply to message #43657]

Wed, 14 January 2004 17:53

dwkurfma
Messages: 32
Registered: May 2009

Baron

Check out fostex as well.

Dan

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Re: UHF driver selection suggestions and thoughts? [message #43665 is a reply to message #43657]

Thu, 15 January 2004 09:29

Chris R
Messages: 133
Registered: May 2009

Master

Eminence makes their APT driver with three different
horn types. They list from $50 to $80. The response
curve they publish goes out to 20KHz. I haven't tried
them. Maybe someone else has and can comment.
Chris

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Re: UHF driver selection suggestions and thoughts? [message #43671 is a reply to message #43665]

Thu, 15 January 2004 14:14

GarMan
Messages: 960
Registered: May 2009

Illuminati (2nd Degree)

I've used the APT80 with the Eminence Alpha10. Replaced the KSN1038 piezo in my 2PI Towers and I like them a lot. But I'm comparing them to the piezo, which was not to my taste.

Gar.

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