@Rick, @PRR
At the same time, they are very easy to build at a good quality as the windings have a minimal amount of turns compared to a tube amped transformer having like 3000 turns, a gap for anode current and thicker wire than necessary in a zero idle current setup. ...It's the usual setup for ribbon speakers and mikes too so he could source it as spare parts for a ribbon speaker or microphone(reversed) system. Xaudia Microphone Blog: Beyer ribbon microphone transformer
just take some of the secondary windings off...
https://pfsonics.com/product/shinhom-t25-ribbon-microphone-output-transformer/
At the same time, they are very easy to build at a good quality as the windings have a minimal amount of turns compared to a tube amped transformer having like 3000 turns, a gap for anode current and thicker wire than necessary in a zero idle current setup. ...It's the usual setup for ribbon speakers and mikes too so he could source it as spare parts for a ribbon speaker or microphone(reversed) system. Xaudia Microphone Blog: Beyer ribbon microphone transformer
just take some of the secondary windings off...
https://pfsonics.com/product/shinhom-t25-ribbon-microphone-output-transformer/
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Well, there are a lot of good thoughts here, and some alternative tech numbers, but where do you guys think that leaves me?
Again, the one thing I know is that my IEMs sound great on every amp I've tried EXCEPT for the SP200, which sounds far & away better than any other amp I tried with 250-600 ohm cans.
Is there any hope?
Again, the one thing I know is that my IEMs sound great on every amp I've tried EXCEPT for the SP200, which sounds far & away better than any other amp I tried with 250-600 ohm cans.
Is there any hope?
Very interesting, (thanks) but WAY beyond my understanding.
Are you suggesting opening up my $1,000 IEM's and removing some surface mount components? ( ! )
Again, I'm nearly desperate to NOT change amps. I have to also use it for all my studio recording, with 600 ohm DT770's. (Yes, the old ones were 600 ohm, and much better sounding) My modified SP200's are incredibly good for this use. (I have six of them in my studio.) I'm still hoping for a 'modification" solution for the IEM's. Otherwise, I'll probably just get another JDS Atom (had one & sold it) and try to find room in my tiny live rack system for two amps.
No, I think he is suggesting that you modify the feedback loop of the composite output stage, which I wouldn't really recommend unless you really know what you are doing. Or are you willing and capable to reverse engineer the thing?
"Remove the protection components which prevent amplifier oscillation when some yutz connects 50 foot long headphone cables. This will lower the output impedance."
That's a modification you might choose to perform upon a headphone amp, in order to lower its output impedance.
The title of the thread says "lower a headphone amp's output impedance" . . . . and I interpret that to mean: what modifications can I perform upon a headphone amp? One thing you can do is pop it open and yank out some protection components.
Another thing you can do to the headphone amp is: replace it. Replace it with a different headphone amp whose internal guts includes a composite amplifier built with an opamp and a current booster.
Yeahbutt... where is the evidence this is an impedance problem? Impedance is different yes, but so are other things.