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Posts by Jan Meier

Dear Precsmo,   any reduction of the supply voltage will effect performance. However, with high-sensitive headphones the compromises will be much smaller than with difficult to drive headphones. Simply try both settings and let your ears tell you the truth. If sonic differences are small then the increased battery life time will be nice to have.   Cheers   Jan
Dear Zenpunkt,   " Your impressions, Jan, reflect very much my impression of the sound of Bakoon amps, which are using a proprietary current based amplification with extremely low IMD."   Current amps do have certain advantages, but only with magneplanars. These phones have an impedance that is near ohmic and independent of frequency.   With dynamic headphones or IEMs, having impedances that vary strongly with impedance, current driving will strongly effect sonic...
Dear headfriends,   " In a very broad and overgeneralized sense, negative feedback will reduce overall distortion but likely introduce higher order distortion(s)."   No, it won't. It's just that low order distortion is reduced more so the balance of the amount of low order to high order distortion shifts.   " Then there's also the issue of what kind of distortion you're trying to measure. Harmonic distortinon is easy-ish, non-linear intermodular stuff not so...
Dear headfriends,   > that sounds even more promising to me.   Yep, it does sound good!   :-)   > Also could you comment on some people saying that opamps are inferior to conventional discrete amp designs.   In the early days of opamps these were made to provide a cheap and easy solution for relatively "crude" applications. At those times discrete designs may well have had their advantages.   Since then, opamps have developed into very precise "instruments" and...
Dear headfriends,   "another project= usb-chargeable version of Quickstep?"   No, it's the development of a new technique to strongly reduce IMD (intermodulation distortion) in amplification using opamps. I've build myself a headamp that allows to switch between conventional operation and this new technique. The sonic results are really promising.   "I can imagine that production in Europe will have its own advantages as well."   Let's hope.   The strong dollar...
Dear friends,   " Can I pay now and receive this sooner"   as you may have noticed the dollar exchange rate has changed dramatically over the last few months. Normally my gear is produced in a dollar-country but right now that is a very expensive choice. Therefore I'm evaluating the possiblity to produce in Europe.   Also working on another project that right now takes a lot of my time.   Sorry,   Jan
Dear friends,   just a note that the auction will end tonight, 24:00 MEZ
Dear headfellows,   One of my neighbours came to me with a big surprise. Just shortly before his sudden death, now twenty years ago, her husband bought himself a new AKG K1000 and it hasn't been used ever since. As a result it is in an as-new condition. The phone is auctioned to finance her a trip to Asia, where her brother lives. So if interested in this classic headphone, simply send me a PM or mail (meier-audio@t-online.de) with your offer. You won't be able to find...
Dear headfellows,   yesterday one of my neighbours came to me with a question. Her husband died twenty years ago but shortly before his sudden death he bought himself a headphone. She wanted to know whether it still had some value or that she could throw it away.   Of course I didn't expect much, probably some cheap Sennheiser from the early 90's I thought, but later that day she came to me with a wooden box that I recognized immediately. And opening the box made the...
Dear Piet,   "will this future device have active balanced ground too?"   Yes, it will. The upcoming amp will be truly high-end!   :-) Jan    
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