My iPod (40 GB, 4th Gen) was in serious need of charging, so I grabbed the Firewire cable and plugged it into my 15" PowerBook (1.5 GHz G4). iTunes popped up, so I figured, why not take a listen (using the Ety ER-4P). Note, all songs were being sourced from the iPod, and all are MP3s at 256...

I stumbled across Mr. Gilmore's sketch of a dual tracking version of the Diden-Jung regulator recently [http://gilmore.chem.northwestern.edu/kgdidenjung.gif]. Adapting this circuit to supply the Dynahi amp seems doable. Biggest obstacle is the high voltage opamp, needs to handle at least...

I posted a similar version of this previously, but then went and bought the Headamp Gilmore V2, i.e. it was never built: schematic (PDF, would post inline, but rendering this into reasonable screen resolutions makes the text unreadable) Anyway, this PS design is two stage linear, with both...

With the large upcoming DynaHi PCB group purchase, I figured a few would be interested in sources of cheap heatsinks. These are the best I've found. C & H Sales has a decent selection, including some nice cross-cut ones, but there is a $30 min order ($5 extra if less). I've purchased from...

While I have a fair number of opera CDs in my collection, frankly, I find most of them to be rather boring and not worth listening to more than once or twice. My preference is for lots of drama with few slow areas, a short list of my favorites: Stravinsky's Oedipus Rex - DG, Chicago Symphony...

There was an ad on HBO for Six Feet Under a couple weeks back that used a Nina song for background music (99% certain it was her, the voice is very distinctive). Can anyone name that tune? Spent an hour at B&N tonight going through the CD stacks on the listening station (and bought a couple in...

My FedEx 2-day shipment arrived in less than 24 hours after being on the phone with Todd and being told they were just about to go out Even fresh out of the box, these are amazing cans, all the clarity of the HP-1000 and then some, plus clean bass down to the 9th level of hell. Listening to...

Just got an electric cello so I can practice in my apartment without disturbing the neighbors. Now I need a good headphone to use with it. Tried to use my Etys but their weakness in the visceral bass department puts these in the not so good category. The Grado HP-1 sounds great, but the cans...

This seems the best forum to ask, cause who else has an o'scope? Wondering if anyone else enjoys watching audio waveforms on a scope (winamp/xmms doesn't count). I ask because it seams to help in my headphone appreciation, especially when it comes to sources. There's a small but appreciable...

Not a huge fan of Marianne, but I would like to get another album if it's anywhere as good as Broken English. Picked this one up for one song a couple years back, after a few listens her husky voice is starting to appeal to me and I find myself wanting more. Wondering where to go from here.

So, I've got the highest bid (at the moment) in a current auction for a pair of Grado HP-2s, not sure if I really want to continue with 5 days left, mostly I was curious how high the reserve was. Not the best reason for bidding Have the HP-1s, and wouldn't mind getting a backup set of Joseph...

My Bela Bartok and Krzysztof Penderecki CDs are almost worn out, looking for recommendations for similar, especially string chamber with influence towards the viola or chello.

I've just ordered a Scott Nixon DacKit in PCB-level kit form, and would like to make it battery powered. Also, want to keep the enclosure in the 5" x 5" x 1.5-2" range (Grado RA-1 and Sony D-555 footprint). Looked at lead-acid, 1300 mAh seems to be the only option that will fit, Panasonic...

I have an old Sony D-465 w/combined line-out and optical-out that I would like to put back into use as a transport, but I don't grok how the optical connection works (toslink output from the D-555 is very apparent). Is there some type of shutter system that retracts when the mini-toslink...

...in which Doris gets her oats. First, a few pics of the NEC CDR-601 internals with the SCSI cable removed (other models may differ). And a schematic of the existing S/PDIF output circuit, CDR-501 being the internal CD drive. Anybody know exactly what those...

I would like to add a Toslink input to my dAack!, originally thought this would require a full blown optical to coax circuit (not all that complicated), but after inspecting the dAck! circuit and checking various datasheets it appears that there's a jumper connection on the dAck! (JP1) just...

Which stage of processing does the error correction for Redbook playback? Wondering about the theoretical aspects of transport quality, there has to be more to it than jitter.

Just picked up a NEC MultiSpin 4x (CDR-601) for $21 off eBay, this was meant to be a cheap transport for the dAck! that should be arriving in a few weeks. On a whim, I hooked it into my amp, me likes! Granted my current source selection sucks, but compared to the Sony D-555, which I thought...

I live in an apartment with the standard paper-thin walls and tend to watch TV late at night, hence I've been using my phones for this purpose a lot lately. To keep the volume control within reach requires a 4 meter IC. My current amps are the EarMax Pro and a HeadAmp Gilmore V2. Surprisingly...

has info from the service manual ever been posted? I've looked at a number of search results, LamerDeluxe's How to adjust your PCDPs tracking and focus is a good starting point, but it would be nice to have a bit more info. I just got a fairly cheap D-555 off eBay (~$110, most go over $200)...

Any opinions on the subject? Got some Kimber TCSS on order but I'm wondering if it would be better to just grab a bit of Cat 5 off the spool (Alpha Wire with Teflon insulation, ultra-low capacitance). I've seen reviews that solid can be better than stranded. Kind of difficult to A/B this...

I would like to purchase a widescreen TV in the 32" range that is able to display both NTSC and PAL format from DVD sources. There are many dealers in the Chicago area (only a couple hours drive) that sell multisystem TVs, but all of them seem to stock 4:3 format models exclusively. Is there...

I just got a set of HP-1s from ServinginEcuador, they sound incredible, though they have also revealed that my sources are severly lacking. I'm willing to spend up to $3000 US for a new redbook player, perhaps a bit more if it can handle some of the newer formats. Seeking reommendations or...

Here's another PS design that I've come up with, this is heavily influenced by the KG PS. The major difference is the (dual-mono) inverting OPA552 output stage. A couple things to note: 1: U3, should be a low-noise, high-precision shunt reg. 2: Caps C9-12 are required to make the OPA552...

I was reading some whitepapers on PS design and came across the idea of cascading linear regulators for ultra-low ripple. Has anyone tried this, is it overkill or enuffkill, how's the noise to ripple ratio? My preliminary schematic. This also includes a first stage RC filter (~10 Hz corner)...