As far as I know Jan Meier has patented crossfeed. So if it can be found elsewhere its patent stealing or a defect.
post #121 of 5935
11/19/06 at 8:05am
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As far as I know Jan Meier has patented crossfeed. So if it can be found elsewhere its patent stealing or a defect.
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He patented a circuit that was invented back in the 50's? Impressive...
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Just as a clarification and to avoid any further misunderstanding, please be aware that Jan Meier is a gentleman in all the extension of the word, his conduct has been impeccable along this years with the customers and in his professional life, it is hard to believe that he would be able to steal anything, intellectually or physically, and he is indeed a very trusty person.
What we ahve seen is all the opposite, his circuits "had been stolen" and used for DIY projects for years. If you go to his website, you will see some circuits there for public use, and you could verify that his circuit was not invented back in the 50's, as the full schematic is there, and also posted on headwize...so please be careful with statements like this, as they could be taken the wrong way...(while I read it, honestly I felt bad, as I have crossed a few emails with Jan, and he is a very nice person, and one of the pioneers of this hobby) Jan IIRC has patented his circuit, and his crossfeed, even more recently he offered a few of his boards to the people of headfi, I got two of them as many others and we are now enjoying the crossfeed thanks to him, for free. There may be another circuits and another topologies around, headroom has an active one, and there are a few more (not that many AFAIK) that had been used in the DIY community for years...But he did not patented any circuit created back in the 50's as his, OK? |
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So what was meant to be said is that he patented one particular crossfeed circuit he created himself, not crossfeed in general. A rather different thing.
Patenting crossfeed in general would be like patenting volume controls in general, or patenting low-pass filters in general. ie, patently stupid. All "crossfeed" is is a variable stereo-mono control. |
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Sorry but crossfeed is far more than a simply mono/stereo gradual control, it is not only a bleeding from one channel to the other, also take into consideration the time delay of the sound in reaching the opposite ear, it is not that simple, as you try to point, please read in the Meier website what indeed is the crossfeed...and any version have to take that into consideration, otherwise is a bleeding control, and not crossfeed...
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"....but I don't think I've heard anyone suggesting that tone controls are a great proprietary invention...."
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| BTW I strongly doubt that anybody will hear the so called "phase errors" over other a lot more noticeable anomalies that you will find in nowadays recordings....like compression, distortion, freq roll offs, etc... |
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Thanks everyone
![]() I bought the HFI 2200 ULE from geartree.com and waiting for it to ship tomorrow ![]() Wish me luck ![]() |
(lolos smilie)
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But turned out that Alexandre had an ace up his sleeve and he led me in to the rear listening salon where all the heavy-hitting gear resides. There he had assembled these bad boys:
![]() The Rega Saturn CD player ![]() The Accuphase E-530 pure Class A integrated with dedicated headphone section |