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 Post subject: Headphone driver in a Magnavox M-4 Model A horn?
PostPosted: Sep Sat 25, 2021 4:42 am 
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Joined: Jun Tue 23, 2015 4:37 am
Posts: 951
Location: SE Iowa 52626
I will probably be picking up a Magnavox M-4 Model A horn at auction that appears to have a dead driver. It will probably just go on one of the shelves rather than used but I am curious if I put a driver or two drivers from a set of headphones in the base in place of the original driver what kind of sound, if any, I would get from it from my radios of the 1920's.

Don


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 Post subject: Re: Headphone driver in a Magnavox M-4 Model A horn?
PostPosted: Sep Sat 25, 2021 7:49 pm 
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Joined: Jun Tue 10, 2008 6:06 pm
Posts: 685
Location: San Antonio, TX
I've used earphone drivers many times in horn speakers and they sound just like original speaker drivers.

Dale


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 Post subject: Re: Headphone driver in a Magnavox M-4 Model A horn?
PostPosted: Sep Sat 25, 2021 11:19 pm 
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Joined: Jul Fri 18, 2008 10:02 am
Posts: 1972
Location: near ST Louis Mo 62002
An element from a sound powered phone works real well when used with a matching transformer of 500 ohms to 2k ohm or so .

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 Post subject: Re: Headphone driver in a Magnavox M-4 Model A horn?
PostPosted: Sep Sat 25, 2021 11:33 pm 
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Joined: May Sat 30, 2015 11:49 pm
Posts: 1958
Location: Keystone Heights, FL, USA 32656
IGot2P wrote:
I will probably be picking up a Magnavox M-4 Model A horn at auction that appears to have a dead driver. It will probably just go on one of the shelves rather than used but I am curious if I put a driver or two drivers from a set of headphones in the base in place of the original driver what kind of sound, if any, I would get from it from my radios of the 1920's.

Don

Looking on radiomuseum it looks like the driver is a pin drive-type with a metal diaphragm, with a single coil. Need to see a photo of yours but the coil is not too hard to rewind if it is open.

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“Nothin’s worth nothin ‘till somebody wants it.”—Irv Metter


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