Has anyone used the Alpha 15 in a two way?

Godzilla · 20th September 2010, 06:21 PM

I was thinking of crossing them with the tweeter and horn below. Figure a crossover around 2k... home use... aimed at the sweet spot.

TIA
Zilla

http://www.parts-express.com/pdf/290-407s.pdf

Eminence ASD1001S 1" HF Titanium Horn Driver 1-3/8"-18 TPI | Parts-Express.com

Dayton H07E 6" x 6" Elliptical Waveguide 1" Threaded | Parts-Express.com

djn · 20th September 2010, 06:45 PM

I have them in this set up. I REALLY like them.

Scottmoose · 20th September 2010, 09:39 PM

Er, 2KHz is about the worst possible XO frequency in the book, being slap-bang in the middle of our critical hearing BW. Granted, it's popular for compact multiways, primarily because about 90% of the midbass units lurking around product catalogues these days can only manage that before their response goes to hell in a handbasket, but if you can avoid it, then IMNSHO, avoid it in the same way you would avoid a dose of the fell Ludolphous' palsy.

Leaving such philosophies aside, the Alpha 15 is not going to be a happy camper being asked to motor up that high. Take a gander at Eminence's own published (on-axis) FR for a graphic demonstration of it's deep and abiding reluctance. To which you can add potentially lousy transient response & a polar response that will almost certainly bring new meaning to the word 'interesting.' 500Hz would be as high as I'd be willing to take them.

20th September 2010, 06:21 PM	#1
Godzilla diyAudio Member Join Date: Nov 2005 Location: New York	Has anyone used the Alpha 15 in a two way? I was thinking of crossing them with the tweeter and horn below. Figure a crossover around 2k... home use... aimed at the sweet spot. TIA Zilla http://www.parts-express.com/pdf/290-407s.pdf Eminence ASD1001S 1" HF Titanium Horn Driver 1-3/8"-18 TPI \| Parts-Express.com Dayton H07E 6" x 6" Elliptical Waveguide 1" Threaded \| Parts-Express.com __________________ www.zillaaudio.com/bib/bib.asp www.ZillaAudio.com

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20th September 2010, 06:45 PM	#2
djn diyAudio Member Join Date: Oct 2004	I have them in this set up. I REALLY like them.

20th September 2010, 09:39 PM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Er, 2KHz is about the worst possible XO frequency in the book, being slap-bang in the middle of our critical hearing BW. Granted, it's popular for compact multiways, primarily because about 90% of the midbass units lurking around product catalogues these days can only manage that before their response goes to hell in a handbasket, but if you can avoid it, then IMNSHO, avoid it in the same way you would avoid a dose of the fell Ludolphous' palsy. Leaving such philosophies aside, the Alpha 15 is not going to be a happy camper being asked to motor up that high. Take a gander at Eminence's own published (on-axis) FR for a graphic demonstration of it's deep and abiding reluctance. To which you can add potentially lousy transient response & a polar response that will almost certainly bring new meaning to the word 'interesting.' 500Hz would be as high as I'd be willing to take them.

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