I messaged @spritzer and did some measurements on the SRD-4/SR-80 system, and many of my assumptions at the top of this thread (which I had gleaned from miscellaneous internet sources) are incorrect. The SRD-4 transformers' turns ratio is probably about 25:1. The SR-80 drivers themselves have an...

Thanks again. My fault with the inaccurate comments about polarizing voltage at the top of the thread. Incidentally I have 2 nice headphone amps, each of which is capable of delivering a lot more power than - say - an iphone. So back to my original question, has anyone tried removing the...

Thanks a lot for your clarification @labrat , but I'm still confused. The SRD-4 circuit is simply: input --> series resistor (actually a thermistor) --> transformer --> output. There is no connection to the bias pin on the output connector (sorry I miss-stated that at the top of this thread)...

I just bought a pair of Stax SR-80 electret headphones along with the SRD-4 energizer (SR-84 system) and would like to avoid using them with a full-size (loudspeaker) amplifier if I can avoid it, since I have a couple of decent headphone amps. (Creek OBH-1 and Audio Alchemy class A headphone...

I just built a pair of planar-magnetic headphones by stealing the already-built elements from some Monsoon computer speakers: https://sites.google.com/site/ralphgonz/music-monstein-headphones But your project is much more ambitious and technically challenging, since you've built both the...

Nice informative DIY article. In case you're interested I went through a similar exercise adapting Monsoon planar-magnetic tweeters to build a pair of full-range headphones. I encountered similar problems with construction, damping etc...

FYI I followed through and built a pair of headphones using the planar magnetic drivers from Monsoon MH-500's: https://sites.google.com/site/ralphgonz/music-monstein-headphones

I repurposed the planar magnetic tweeters from Monsoon MH-500 speakers ($20-$40/pair on ebay) to make planar magnetic headphones: https://sites.google.com/site/ralphgonz/music-monstein-headphones They have some colorations in the upper bass and not the sharpest stereo focus, but they sound...

I was thinking this would be a cool way to build a DIY planar headphone, and am glad someone's already laid the groundwork! Regarding the limited low frequency response of the Monsoon speakers when used conventionally, this is related to the width of the speaker: at frequencies whose wavelength...

I guess this is a very old thread, but my HD 580 headband just snapped for the second time (first fix was flexible aluminum strip attached with epoxy). This looks very interesting, a 3D-printed replacement for $38 + $5 US shipping...

I would absolutely *not* go with the Sennheiser HD-280. They are fine for tracking but have a weird boxy coloration and overdamped bass. Go with an open back design like the Sennheiser HD 598 or AKG K240.   And it's fine to mix with uncolored headphones, once you've listened to known material...

As a followup, I received my used K270's today and did a quick comparison against the Sennheiser HD280 Pro. This is in the context of making recordings.   Bass: the K270 carries a lot more weight, so you feel more bass, even though the Sennheisers have equal extension. Midrange: related to...

I have a used pair of K270 headphones on order. In advance to actually listening to them I thought I'd offer some information about multi-driver interference and comb-filtering in this context...   It is true that two separated sound sources *can* produce a comb-filter effect. This occurs...