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best horn for 2426h in Pi type system? [message #39148]

Thu, 21 November 2002 12:47

tdc
Messages: 34
Registered: May 2009

Baron

What is the best horn for use with the 2426H in a Pi type system ? Currently I use a 2345 with a 4648 ( dual 2226J's).The crossover is a Pi JBL pro type that Wayne helped me get together. The distance to my listing chair is 16 ft. The old JBL lit calls this a short throw horn but I have seen folks refer to it as a long throw type as well. Is there any horn that people have used which is significantly different or better then the 2345 for an average to large home listening room as opposed to an auditorium?I like the sound I am getting but changing the horn would be the only easy tweek I could do. Or should I just leave it as it is? Thanks TDC

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Re: best horn for 2426h in Pi type system? [message #39154 is a reply to message #39148]

Thu, 21 November 2002 18:53

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

I like the Peavey CH-3 and Eminence H290. They work well in my designs, and are actually interchangeable. Both are about the same length and have similar directivity, so they can be used with the same crossover.

Have you thought about wood horns? The Martinelli horn is a great way to go. It sounds good and looks good too!

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the smallest one? [message #39172 is a reply to message #39154]

Fri, 22 November 2002 16:52

tdc
Messages: 34
Registered: May 2009

Baron

At the Pi 4 crossover point (1600 hz.) I assume you would use the smallest of the wood horns? tdc

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Re: the smallest one? [message #39176 is a reply to message #39172]

Sat, 23 November 2002 00:08

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

Yes, you can use either the Martinelli 12" or the 17" horn at 1.6kHz with excellent results. The larger horn can be expected to perform well down to 800kHz but the smaller one cannot be used under 1kHz.

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Re: best horn for 2426h in Pi type system? [message #39183 is a reply to message #39154]

Sat, 23 November 2002 08:01

Tom Brennan
Messages: 32
Registered: May 2009

Baron

IME an Edgar saladbowl has much better high frequency response than Bill's horns. The collapsing directivity of the saladbowl lets one run a 1" driver without compensation. I've measured 1" JBL and Altec drivers flat out to 16khz on axis on saladbowls.

In my experience and opinion the best horn for 1" drivers is the Altec 511B. Very extended high frequency response au naturale and just something "right" about the sound.

Chicago Horn Speaker Club

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Re: best horn for 2426h in Pi type system? [message #39184 is a reply to message #39183]

Sat, 23 November 2002 09:17

Rex Mills
Messages: 9
Registered: May 2009

Esquire

Tom..since you like the 511 horns for 1 inch throat drivers what is your opinion of the 811B horns for the same. Thanks!

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Re: best horn for 2426h in Pi type system? [message #39185 is a reply to message #39184]

Sat, 23 November 2002 11:44

Tom Brennan
Messages: 32
Registered: May 2009

Baron

Rex---I think the 811 is very similar in sound to the 511, of course you have to cross it over higher. I've heard some most excellent systems using the 811 horn, Altec Valencias and Model 19s. I used 811s myself for awhile and liked them. Great horn if you want something compact and will crossover at 800hz or higher.

Like the 511 the 811 benefits by damping the horn, non-hardening modeling clay in the "lips" and screwing the horn securely to a baffle will do the trick.

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Edgar vs. Martinelli [message #39187 is a reply to message #39185]

Sat, 23 November 2002 11:58

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

Both Edgar and Martinelli make excellent horns but I prefer using 90o horns for the home, particularly for cornerhorns. That makes the pattern equal for the entire audio band and charges the reverberent field equally. Narrower horns increase SPL on axis, but at the expense of having a narrower listening area. And collapsing directivity does weird things to the reverberent field, which I don't like.

I'd also like to point out that compensation EQ making the power response flat doesn't abnormally increase energy in the room; Rather, it raises it to be equal throughout the audio spectrum. Acoustic EQ from collapsing directivity leaves the total energy in the room lacking at frequency extremes. So it is actually horns that employ collapsing directivity for acoustic EQ that have unequal energy distributions in the room.

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Re: best horn for 2426h in Pi type system? [message #39190 is a reply to message #39185]

Sat, 23 November 2002 18:22

Rex Mills
Messages: 9
Registered: May 2009

Esquire

Tom..Thanks for the response.

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Re: best horn for 2426h in Pi type system? [message #39209 is a reply to message #39183]

Mon, 25 November 2002 14:50

D Kurfman
Messages: 4
Registered: May 2009

Esquire

Tom,

Are you saying that with a JBL 2426 on an Edgar "salad-bowl", all that is needed is level matching and flat response to 16K is achievable? Just want to make sure I am understanding you correctly. What, in your experience, is the lowest practical crossover in this configuration?

Dan

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