[Boatanchors] Do Headphones Age-Away?

[Brian Clarke]

I think you'll find that the permanent magnet is there only to hold the diaphragm in place. I cannot see how increasing the magnet strength would increase the audio loudness. The amount of variation in magnetic force to move the diaphragm is probably a thousandth of the permanent magnet's strength.
73 de Brian, VK2GCE.

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Al Klase
Sent: Sunday, 14 August 2022 2:02 AM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Do Headphones Age-Away?

Jeo Conner said:  Sometimes, it's simply the "aging" of our ears. LOL.

That's not a joke.  I tested some headsets back in 1997.
http://www.skywaves.ar88.net/xtalset102/headsets.htm

I repeated the tests with some of the same 'phones last year.  I'm about 
10 dB down.

That said, it may be possible to spiff up the classic metal diaphragm 
'phones by stroking the pole pieces with a strong (Chinese) rare-earth 
magnet.

Al

ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/