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2245 cone is too heavy for the suspension... [message #46354 is a reply to message #46344]

Fri, 18 February 2005 09:08

spkrman57
Messages: 522
Registered: May 2009

Illuminati (1st Degree)

Wayne,
I am willing to trade the bottom end extension for the higher SPL. Also, I had 2245's in the past and there are issues with them that I don't want to deal with.

I have a pair of cabinets that are 8.8 cu ft and tuned for 28 hz. I know that will leave me somewhere around 40hz for bottom end which is okay for me. I never had a problem with my 2226's which had about the same bottom end response.

And the 98db efficiency beats out the 95db of the 2245's. I will be running Yamamoto 45 SET amp for 2 watts/chnl.

Also, if I ever get some Edgar sub horns, I will be set for drivers as the specs are excellent for a sub-horn driver.
Ron

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The 2245 is tuned lower [message #46358 is a reply to message #46354]

Fri, 18 February 2005 16:54

Wayne Parham
Messages: 18691
Registered: January 2001

Illuminati (33rd Degree)

The 2240, 2241 and 2242 drivers are certainly nice too. As you've noticed, they trade extension for SPL. But unless you exceed xmax of the 2245, there are no problems with it that I've encountered, and I've pushed 'em pretty hard. You can exceed the mechanical limits of any driver, but as I recall, you're running tube amps and I don't think you'll have excursion problems with them. Maybe the 2245's you've had were damaged?

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2245 xmax=.38 2240 xmax=.22 [message #46361 is a reply to message #46358]

Fri, 18 February 2005 18:09

:mikeo:
Messages: 2
Registered: May 2009

Esquire

2240 has half xmax of the 2245 and will bottom out sooner. Consider also the plate amp subsonic boost eq to make response flat on Edgar subs. With 45 amps, I'm sure either one will keep up just fine.

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2240's are not for sub duty [message #46363 is a reply to message #46361]

Sat, 19 February 2005 07:33

spkrman57
Messages: 522
Registered: May 2009

Illuminati (1st Degree)

If I need subs, I have plenty of Eminence 15" for that duty. I just want a high-efficiency 3 way system.

At 98db, the 2240 would still be the least inefficient in the system. The midrange horn driven by Altec 288 is 115db/watt, and the tweet is around 107db/watt.

None of my single ended amp are more than 15 watts/chnl, so max excursion is not a issue.

Ron

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As an aside, [message #46366 is a reply to message #46363]

Sun, 20 February 2005 04:27

Wayne Parham
Messages: 18691
Registered: January 2001

Illuminati (33rd Degree)

Throw together a pair of 10" midhorns sometime and see what you think. They're great for covering the 200Hz to 2kHz vocal range. I have the crossovers all worked out and I really enjoy this setup.

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Re: As an aside, [message #46367 is a reply to message #46366]

Sun, 20 February 2005 07:23

Chris R
Messages: 133
Registered: May 2009

Master

Will the mid-horns make it to 3.5K or 4KHz? I've been thinking
about using an APT-200 (or 150) maybe in a Pi7-18.

Thx, Chris

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Re: As an aside, [message #46368 is a reply to message #46367]

Sun, 20 February 2005 07:42

Wayne Parham
Messages: 18691
Registered: January 2001

Illuminati (33rd Degree)

See the response graph in the post called "Implentation" in the "Midrange Horn" thread. What you'll notice is that there is some peaking from breakup modes that increases output above 2kHz. On some drivers, this will be controlled and on others, less so. It's totally driver specific. My approach has been to crossover at 1.6kHz, but you can sure take advantage of the output above that frequency, and push it maybe an octave further. You can also employ a bypass capacitor across the attenuation resistor to increase HF response.

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Altec 288 on 350hz Edgarhorn from 500hz on up to JBL 075's [message #46369 is a reply to message #46366]

Sun, 20 February 2005 10:47

spkrman57
Messages: 522
Registered: May 2009

Illuminati (1st Degree)

I think the JBL 2240 will reach up to 500hz no problem. I will also be using a 1st order crossover for all three drivers since I am only running 2 watts/chnl.
Ron

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Re: Altec 288 on 350hz Edgarhorn from 500hz on up to JBL 075's [message #46370 is a reply to message #46369]

Sun, 20 February 2005 10:50

Wayne Parham
Messages: 18691
Registered: January 2001

Illuminati (33rd Degree)

Yes, the 2240 will work just fine through the midrange fundamental range.

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Re: Taco Bell [message #46371 is a reply to message #46345]

Sun, 20 February 2005 18:37

dwkurfma
Messages: 32
Registered: May 2009

Baron

Hey Wayne
It can get ugly on audioasylum, and I've had the "pleasant" experience of getting trashed over there. Still, there are a couple (well maybe a few more than that) of guys over there that seem to have their heads on straight and have been doing this stuff a "long" time. Then there are those that start talking about lf driver "speed", and "only a horn can keep up with a horn" or how their 6" full range on an open baffle with a little SET can play louder than anyone needs to listen and the pain sets in behind my eyeballs... ;(

Dan

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