Anybody know offhand whether the 15ft Grado extension cable that comes free with RS-1's has 4 wires or three? That is, are there 2 ground wires?

Did something change? Code: http://graphs.headphone.com/graphCompare.php?graphType=3&graphID[]=123 Used to give RS-1 impedance but now gives W5000 50H square wave response. The Grado graph has moved to Code: http://graphs.headphone.com/graphCompare.php?graphType=7&graphID[]=293

Revisiting an old project: the old threads are here, here, and here. There is actually a missing iteration as there was a Pint in the case for a while. Anyhow, it is now a Szekeres. Sounds pretty good, too. More details, sort of, at my site.

I am in need of a portable player to take on vacation. The basic requirements are lowest cost possible, support for Rhapsody to Go and Audible.com content, decent battery life, and of course, the best sound quality possible. The only thing i can find that seems to fit the bill is the iRiver Clix...

I am thinking about putting together a silent PC for audio use. For what this will be used for, performance is actually not that important, so long as it is quiet. So what I am looking for are motherboard, processor, videocard, PS, and case suggestions for a quiet and inexpensive PC. It will...

This is a totally inappropriate place to ask this, but answers here on tech topics generally seem pretty good. So, I am looking for backup software to use with Windows Server 2003 /SQL Server (actually MSDE). I have been using Retrospect 6.5, but it is really miserable so it is time for a...

Never mind -- all is in the asio4all instruction thread. Mods, you can delete this if you see it.

Anyone know if Grado uses a dual ground wire all the way to the jack, or if it is a single wire up to the split?

I sold off my old cd player (Cary 303/200) as I primarily use a squeezebox with a dac. But, I do occasionally need to spin an actual cd, and I need a dvd player. So, can anyone suggest a dvd player that will also work as a decent transport. Something I can pick up used in the $200 range is...

I wasn't really intending to do these, but I got started and couldn't stop. If you are unfamiliar with the original HPDAC, you can read about it at: http://www.ecp.cc/HPDAC.html The HPDAC2 is a 8x oversampling design using the pcm1794 or pcm1798. It has the same foot print as the original (in...

For those of you who follow such things, I have made some additions to my comparison of various coupling caps. I added a few more things to test as well as adding a high voltage test. http://www.ecp.cc/cap-notes.html

Anybody recognize these? Someone sent them to me a while back, and I don't know what they are. Is that little line the negative terminal?

Something else I have been tinkering with for a while. The "case" is temporary. It is the second breadboard iteration to check for proper layout. The amp is modular in that the tubes are attached to little replaceable circuit boards (with terminal blocks for the wire connections) so that...

I have been tinkering with this project for a bit and thought I'd post something here. This is basically an update to the Millett amp (with a 6gm8 instead of the 12ae6a) but with the big output cap removed and now with a 3 channel buffered output. More info is available at...

I went to fire up my turntable tonight for the first time in months, and found this: It still plays, and in fact seems to sound okay, but I am sure it can't be good. Suggestions?

Mods, if this is in the wrong place, please move it. I have a couple of extra PCBs for making 2 different versions of the Szekeres amp. I would like to sell them off with the money going to my favorite charity: http://www.treehouseanimals.org/ The way this works is you PM a bid, and in about...

There are a lot of threads on the best 6sn7's, but I am looking for suggestions on the best cheapie tubes. Any thoughts on what some of the best 6sn7s in the $20 to $30 range are?

I am looking for a cable to make a highish voltage (~250V) umbilical from a PS to an amp. Canare's website says that Star Quad is tested at 500V for 1min, which does not really give any good information. Anybody know whether this cable will work here? I need at least 4 strands (though honestly 5...

Does anyone know a source for such a thing or am I going to have to make it myself?

I am stumped. I made a small PCB in Eagle -- It is very small and simple and has about 15 components on it. When I try to make gerber files (first running excellon.cam and then running gerb274x.cam) the drd file (the drill file) does not match up to the other files. When I open it in...

The problem, for me, with the available portable amps is that they aren't really that portable. They all need batteries, and, even worse, they all need sources which also need batteries as well as cables to connect them. I wanted something that I could take to a coffee shop, connect to my...

Anyone have any thoughts on the importance of a fuse in a project using a 24VAC wallwart and a tread board for rectification? The datasheet for the transformer (http://www.mouser.com/catalog/specsheets/114154.pdf) gives no indication of whether there is any built-in protection.

Hammond makes a cute little enclosure, the 1455C802, which is just right for holding a 50mm x 80mm circuit board. However, it is very thin (23mm outside), so a board with any components that stick up more than about 15mm won't fit. This, sadly for my purposes, includes Panasonic EJV pots...

I am trying to go from Eagle files to boards, which of course involves gerber files. I have followed the directions at http://www.interq.or.jp/japan/se-inoue/e_eagle44.htm as well as those in the eagle tutorial, but I am not sure what to do with all of the files. I have tried to look at the...

So, I have these two questions that I feel should have obvious answers, but that maybe don't. The first relates to the ground channel setup in the ppa/pimeta/m3 type amps. Why is there an opamp in the ground channel? What is it doing that the buffer can't do alone? In the L & R channels, the...