Quote: My HRT Music Streamer II+ sounds better going through a D-Link 4-port powered USB hub ( http://www.dlink.co.in/products/?pid=104 ), presumably because of the 2.5 amp power supply it provides for the analog output stage. The difference is significant, as others have also reported...

Ety 4p's are hyper-revealing, some say to a fault, more so if you add 75 ohmn of resistance (use best materials and resistors available or you'll dislike the results, the official conversion cable costs $65 for a reason) to turn them into Ety 4s's. To my ears, the amp accounts for far more...

Quote: Originally Posted by rickcr42 http://www.digido.com/portal/pmodule...er_page_id=27/ Easy to understand language,very non technical,dead on This article does a great job of explaining dithering. I take issue with one claim: If one is working alone as a complete...

Before digitizing analog audio for myself, I had always thought that the 44.1 K sample rate was the main weakness of CD audio, not the 16 bits bit depth. I was wrong. There's a right and a wrong way to digitize CD audio from analog. The right way: Digitize to 24 bits. Make all intermediate...

Quote: Originally Posted by amb ...only matters in high impedance areas of the circuit. At the output of the amp where R9 is, this is not the case. Hard to tell with the depth of field blur in the photo, but it looks like all the resistors are mounted in the same style? As a...

I've gotten the impression from various tech notes that it's a good idea to solder resistors flush with the PCB, to minimize signal path and stray inductances and so forth. On the other hand, we see 'dead bug' construction all the time for CMOY and similar amps, and the limitations of those...

I bought a pair of good wire strippers at Fry's, intended separately for stranded and solid wire. I sometimes cheat by intentionally using the wrong one at my peril, e.g. with particularly tenacious insulation, but at least my tools recognize the issue.

Quote: Originally Posted by zip22 http://www.fixup.net/tips/ety/ety.htm just wire in some high quality 75 ohm resistors (1 per channel). One should glance at this page for ideas, then wait until one has forgotten any details from this page, before starting. This converter is...

I don't know how uzziah came by this link, and I sure don't want this whole forum going off its meds again, but this link has picked up somewhere a commercial "tail", the equivalent of a computer virus: Quote...

Quote: Originally Posted by peranders Those above are used for 69 USD! To be fair, 69 USB for all ten.

Quote: Originally Posted by Garbz and the only problem may arise if you drop them (they are hard bastards to find on a dirty floor). Been there. I felt like I was looking for someone's contacts. Of course, try repairing a bike on a Fire Island deck over a patch of poison ivy...

You'll want to add 75 ohms resistance to make the 4p into 4s, at least one some music. I use an external cable, but I'll probably do this internally in the future. Then, a gain of 4 or 5 makes more sense, depending on your source.

Arrived. Thanks!!

People use the phrase "trickle charge" in various ways. I go with the convention "10 to 20 hour charge", not "maintain a charge while storing indefinitely". Consumers demand fast charging, and it's hell on batteries. The meticulous manufacturer guidelines about terminating charges should be...

First, C/12 is the "ideal" rate. It could be shorter, because they weren't fully discharged on last use, but you still want them topped off. It could be longer, because they need a full charge, and charging isn't 100% efficient. I wouldn't leave this hooked up for months, but I wouldn't hang...

The "save for web" command is all one needs to know. My Photoshop is like my French, it'll get me fed, but is of no help for other appetites!

Quote: Originally Posted by BlazerFRS I'm using the $2.97 18v AA recharger from radioshack to power this; it should be able to push two batteries (in parallel) at once right? Quote: Originally Posted by tangent If that's a fast-charger, it's going to damage the cells. 9V...

Quote: Originally Posted by strohmie Quote of the Month: "I think electrical companies should start charging for imaginary power." Don't they? Mine's AC, what's yours?

Datasheets are your friend. Find an op amp available both dual and single from Mouser or Digi-Key, and download the datasheets, stare at the pinouts. You'll answer your own question in more detail than we possibly could. The extra pins on single chips offer options most circuits don't use...

Quote: Originally Posted by clarke68 Just gotta practice my "flood & suck" technique on some free samples from TI. The pictures of "flood & suck" I've seen look worse to me than just soldering normally. I use .015" solder, a 1/32" tip, a good iron, a magnifying glass and good...

Quote: Originally Posted by BlazerFRS wouldn't that .7 volts cut into runtime? No, same runtime, just at a lower voltage (by .7 volts). From the battery's point of view it's the same voltage, it just doesn't all reach the amp.

Quote: Originally Posted by ppl I highly recomend his book i myself have reread it severial times and each time omthing refreshing is found http://www.amazon.com/exec/obidos/tg...11346?v=glance ppl, what would you buy with it (same category) to make Amazon's free shipping cutoff?

Sorting through this thread, there are two issues: Matching and sound. Rick's setup is impervious to matching considerations; he's using dual mono pots in place of stereo volume and balance controls. His approach is much cleaner if you think about it. People buy stepped attenuators to get...