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Old 7th April 2007, 08:52 PM   #1
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Default Magnavox Horn Specs...

HI all,

I have a pair of Magnavox 580088-1, 70.50 horn's and I,ve been looking for specifications on them, so that I may try to design a proper crossover.

Also, If any one has any driver recommendations, this would be really appreciated.

I did some googling and searched here, but did not seam to find much.

The pic attached is close to what I have, but not them. I found this pic in a ebay auction, and decided to use it as its a much clearer picture that what my poopy digi-cam can do.

Any help and advice would be great, Thanks.
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Old 7th April 2007, 11:01 PM   #2
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I have a pair of those. They were made by Foster.

Real screamers! Can be super harsh. If crossed up high enough, they're OK. At the moment they serve as rear firing tweeters on my open baffle. You can help them some by damping the back plastic cap and the outside of the horn throat. But a lot of the harshness comes from the driver itself. A resistor will tame some of the peaks.

Sorry I don't have any specs on them. Someday I hope to run some FR charts as well as impedence curves.

Let me know what you find - I'd like to know more.
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Old 8th April 2007, 03:47 AM   #3
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Default Re: Magnavox Horn Specs...

Quote:
Originally posted by sid216
I have a pair of Magnavox 580088-1, 70.50 horn's and I,ve been looking for specifications on them, so that I may try to design a proper crossover.
Any more written on them? Indeed Foster made some of them, but i have also had the same made by Jensen & by Heppner.

dave
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Old 8th April 2007, 03:49 AM   #4
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some of the impedance curves i've measured... i can only go by the file names as to what is what... these are probably Jensens.

dave
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Old 8th April 2007, 03:54 AM   #5
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and this is a foster variation...
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Old 11th April 2007, 04:49 AM   #6
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Thanks guys. As far as and other labeling, there is a yellow lable on the magnet cap that says "Form HN-1". Thats it other than a warrenty disclaimer.

On the side by the opening of the horn there is a Logo that I tried to copy in paint, but its the best I could do with a mouse. Thanks all.
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Old 11th April 2007, 05:40 AM   #7
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Click the image to open in full size.

Foster logo.

dave
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Old 22nd February 2009, 09:46 PM   #8
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Default Magnavox 580088-1

HI I JUST JOINED THE DIY AUDIO.COM GROUP WHEN SEARCHING GOOGLE FOR Magnavox 580088-1 sorry cap lock on and I'm a slow typirst and realy realy bad speller. I'm not sure of the date of your original post for the x-over but thought I woudl email you. Yesterday a friend bought an old Mag console at a garage sale in mint condition, and pulled the speaekrs, x-over and horns and the solid state gear adn tossed the cab. I thought he shoudl have saved it but spaces is an issue. We tested them and they are in mint condition. Who ever bough this console must have put it in a basement stil in the box becasue it looks like its brand new. Did yu ever find the specs for these vintage speakers? Are you still looking for the x-over? regards davidmorris
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Old 23rd February 2009, 05:36 AM   #9
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I think this is my measurement of the horns. DCR is about 11 ohms.

On the graph the top line is phase.
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Old 23rd February 2009, 05:40 AM   #10
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And here is the same thing in text format. You can change it to a zma file and plug it into some software for crossover modeling.

Sorry, no FR plot.
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