Beyer M380

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In honor of the 1 year anniversary of the last post on this topic...Awhile back, I took a driver out of a pair of Beyer DT770 (250 ohm version) headphones and mounted into an old Sennheiser MD403 shell. Sounds berry berry close to both of my M380's. Close enough that I can use it any time I would use a 380 without worrying about killing it. I too like that it doesn't need a preamp--it's happy going straight into my Digi line inputs.

Beyer M380

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audioboffin wrote:There is no transformer per say in a Beyer 380, but a humbucking coil is wired in series with the dynamic "capsule". See http://www.coutant.org/beyerpdf/m380.pdf for a schematic.Good point. You can probably afford to skip this though; I've done it with M88s before when they have gone faulty.It does suggest however that the capsule may not be exactly the same, unless the housing for the headphones transducer has an area where a hum-buck coil can be locally mounted.If someone wants to see if these transducers are the same, just measure the impedance of them at varying frequencies, outwith* their housings.*Hey, I used a Scots word.

Beyer M380

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I did not bother with a humbucking coil, and saw no need for a transformer, as neither of my M380's have transformers. I've had no problem with hum--but I only use it in my home studio, not for gigging. That can be a noisey electrical environment. After all these months since my last post, it has remained reliable and sounds indistiguishable, (to my amateur ears), from my two M380's.BTW, I don't know how much influence this thread has had, or if it's just the economy, but it seems the prices of M380's have fallen on ebay over the past several months. I'd like to get a read on how many others have tried this successfully.All the best,Mark

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