luvdunhill

yeah, it was for two group buys. I had the opportunity to talk with Linear several times, as we worked some special pricing on some of the form factors. I wouldn't hold your breath for the p-channel parts. Toshiba just EOLed the 2SK170 this year, so people will start switching over to the LSK170 first then the other parts may come along. Don't forget that the Charles Hansenes and Nelson Passes of the world have 1000's of these rare parts squirreled away. This reduces the market pressure to release these parts. Also, matched JFETs aren't the only kid in town. There are solid bipolar options out there that for example some of the phono stage manufacturers are starting to use.

I bought $10,000 worth of parts from Linear Systems this year. I wager they don't get their act together in 2009. They will release the single version of the p-channel part in question first anyways.

I don't get it. Carry on.

Why does Stereophile post these graphs then? Probably just to fill up space...

simple. you'll have more data variance in the impedance plots and they will be make a much better comparison. For example, one things I use impedance plots for in speaker design is to determine which frequencies the enclosure itself wants to resonate at. This would be interesting data for headphones. I'd recommend looking at D'Appolito's book on speaker testing. It's pretty much the reference on the subject, besides IEEE journal articles.

I'd say pretty hard. Depending on where you get the replacement cable, it will have either foil leads or some sort of stranded wire. The foil leads are damn near impossible to work with. This is the older style cable. Plus is, that they come off the driver very easy. I'd liken this process to doing SMD soldering in its intricacy.

no but head-case isn't available from China. Too many ROFL MAO pics or Jude is bed with the Commies...

that's more like it. Last think I bought was 8 Pass F5 PCBs. I can build a pair of balanced amps with my current heat sinks..

you don't need something like AP. Just download Speaker Workshop and use the play back / recording features built into that. You may need a simple cable with some known impedance, but it should work very well.

you should post the impedance curves. these mean a lot more than the frequency response does, as the frequency response and phase data can be recovered via a Hilbert transform. This is the beauty of the Thiel-Small work.

dude, this is extreme DIY!

you should really try the Japanese ones. They are labeled X386S Japan. They are MKP in oil. Fantastic caps.

Both are excellent drivers. I went with Per Skanning's new company, as I could get a custom driver made for no up-charge, as all of the C-Quenze are made to order.

probably < $250 a pair, not including MDF, or BB. You could ghetto it down more by winding inductors from old hangers located in Reks basement.

if said person wants to step forward, they probably have a good idea of total cost by now. Size is a 19 L (0.67 cu ft) vented enclosure. Graph is SPL at the point where the port noise becomes audible ("chuffing") and this occurs at 39 watts. Here's the woofer modeling:

sure. are you thinking of a ribbon speaker? I have a entry level design that I'm working with someone on.

finally bought the ribbon tweeters.. I'll basically have these two drive units, but my AT will be a smaller, custom unit. yay!

Lenovo T400 Too big for my taste I'll have to swap it out when I get back from China...

My limited experience with orthos can be summed up as follows: if you: A.) want to like an electrostat but keep trying to make it sound like a dynamic headphone without success B.) think the SR-007 is "dark" C.) like the Jade then you should try some orthos.

my question is why would you run the noisy digital signal for the display through the umbilical...

well said Voltron. Where is Singlepower? Where is Mikhail? - Page 78 - Head-Fi: Covering Headphones, Earphones and Portable Audio

nope, not over-analysis, just that many recording or sound reproduction systems are off-pitch or introduce pitch issues, hence the annoyance. edit: perhaps I disagree with the term over-analysis. It's an innate/subconscious analysis, not an purposeful analysis.

yes, I know a number of people like this, it's quite common, so my audiologist says.

I've found you have to leave these on for a while to get them sounding good. Not burn-in per se, but just have to be running 24x7 for some reason. I cannot explain it, but this DAC always sounds crappy at meets for some reason, and I've attributed it to this reason. Nice find though.

I just tested this last night. Trafo was an R-core with single primaries with marked phase. A 3A fuse blew when they were installed in one orientation, but not the other. YMMV.