As a sort of continuation of the thread on someone else's problem with iTunes and AirTunes that turned out to be the CD extraction quality - I realized that I'm having the same problem actually. I ripped several hundred CDs using iTunes a few months ago, and stored the files as losless AAC, on a...

So I decided back in early August to buy HD25-1 as I'll be travelling and need a good closed phone, and afterwards it'd be good for the office. I ordered from eutronics, thinking that 5 or so weeks should be more than enough to get them. But I'm due to travel on Friday and I haven't even...

I just got an iHP-120 and from some posts around the web it looks like there's a free database builder (builds the database from tag files that is used to browse by artist/genre etc.) that will do the job much better than the iriver's manager but I cannot find anything with google. And of course...

Is any electronics supplier in US selling 220V wallwarts? Alternately, where in Europe could they be ordered from?

At what voltage is a standard NiMh 1.2V cell considered to be "empty"? I seem to recall that it keeps at 1.5V when full, quickly tapering off to somewhere closer to 1.2V and then (when empty) starts falling rapidly. I was thinking that 1.1V might be the point where you'd say that it's time to...

How would one go about this? I tried CoolEdit and Audacity, both for playback and just to generate files, as well as foobar to playback the 32-bit wav. What seems to happen is that if I feed this signal to external DAC and then back to Revolution 7.1 I get harmonics all over the place, which I...

A colleguae at work wants a closed headphone so that he doesn't hear others and others don't hear whatever he's listening to. As he's not going to spend a lot of money on it, and the only thing coming to mind that is locally available are Sonys (and Sennheisers, but their selection is limited)...

I did some RMAA 5.1 measurements on my Sony SACD player for no particular reason. Here's the headphone amplifier results, when not loaded and when loaded with 3 different headphones. http://members.shaw.ca/ifkovic/elect...comparison.htm Take a look at frequency response. Looks familiar? I...

...several of the models (the highest end models only unfortunately) have optical outs. Does anybody know if optical out is active when playing MP3's?

I was just reading about what's inside this Philips 963A player, and realized that it uses AD1895 - second best upsampling chip at the moment, by a small margin, and AD1955 - best spec'd DAC chip available right now. Even some of the opamps look impressive. I guess this is part of the...

Well, at least this is news to me. I haven't been buying any SACDs since last fall - and I had a few to begin with - prices were steep and combine that with fact they'd play only in one of many players I have... Anyhow, there seems to be a batch of new cheap hybrid SACDs coming from Philips (and...

Tangent won't like this one: The manufacturer has announced this part(s) will become obsolete. TEXAS INSTRUMENTS Description: IC 1/2 RAIL VIRTUAL GND TO-92 Manufacturer Part No: TLE2426CLP Digi-Key Part No: 296-1994-ND

Well, it's over a year since I embarked on this project, and almost a year since the first prototype worked. This one marks - almost - the end of my journey to portable sound bliss. So as posting "long awaited" pictures of everybody's favorite projects is a recent trend here, I thought I'd chime...

I'm kind of surprised that I haven't seen more threads about iPod. I got one of them 2 weeks ago and am still in awe. I think I can understand now the Apple appeal. This thing is designed for USE, not for geek show-off. Therefore, it has ease of use and intuitive interface - it does what it's...

I plan to design and make some PCBs for power supplies for my many projects. I have too much projects half-done (some of it quite expensive and hard to get) because I don't have required power supply. Some need unregulated +-9V, and some need regulated +-5V, or +-12V or +-15V or even +-24V, or a...

Has anyone experimented with battery voltage and AD8610? When I and ppl looked at datasheets way back, we guessed about 6V (+-3V) would be lower boundary. I used only 2x9V so far and really noticed catastrophic change in sound when batteries were quite dead, which was usually less than those 6V...

I was fooling around with my portable DAC and put two fresh alkaline batteries instead of two NiMH's. Listening on speakers, I could swear the sound is airier and soundstage has more depth, and it wasn't a small difference either. But the NiMH were fairly full, about 7.8 volts or so each. Tell...

...or maybe in Western Canada only. A & B sound has a sale on them - $54. Koss is more expensive here than in the US but this is better price than usual. If you need headphones that you can plug in headphone jacks of portables and still get a good sound without having to carry an amp, these fit...

Well, this one was the easiest yet. Digital section started working as soon as it was plugged in, now that haven't happened in a long while. This is probably the last one. It has less parts, takes less space, less SMD parts, and is easier to build. Trust me, soldering that DIR1703 is not a...

I promised this document long time ago and I have been working on it for a long time. It's not yet finished but there's probably enough info for people who were interested and if I continue tinkering with it, I'd never be really ready to put it up. Be warned, I love to write and this is a...

I need to buy a couple of headphones - 2 or 3 - as presents to go with some cheap portable CD players. When using some good cans powered by external headphone amp and using PCDP's line out, the sound is quite acceptable. But the headphones that come with CDN$30 - $50 PCDPs are atrocious. I have...

I was experimenting with this EJ915 over the last few days, powered through AC adapter, connected to my new portable DAC with optical cable. It worked great. However, on Monday I wanted to listen to it in bed and I didn't have enough free outlets there so I used external battery pack. What I got...

Second prototype is finished and is working just fine: It draws 69.7mA when optical in is used, but that can be reduced by another 12mA by using another optical receiver (which I still don't have). At any rate, >20hours on 6 NiMH batteries is satisfied even now (and it could be closer...

================= This thread is split off from a runaway thread that hsnam started over here: http://www.head-fi.org/forums/showth...&threadid=3313 -Apheared ================= hsnam, buying a Dremel will change your opinion on drilling PCBs. From a horrible 4-hour chore, it became...

Well, I'm sick and tired of fiddling with power supplies. This is the schematics as good as I can get it: I'll deal with AD1853 next, it has friendlier power supply parameters and also volume control, although that one might be tricky.