I turn, once again, to the collective wisdom for some guidance.  The title here details my recent explorations in finding headphones (or IEM's) for my work listening experience.   Brief background: I work, both at the office and at home, in fairly noisy environments.  I have a very difficult...

Hello All,   It's been a number of years since I've been in the market for a new pair of 'phones for office listening.  I'm currently using Ultrasone PRO750's fed by a Gamma 2 DAC and Bijou tube amp.  I've been content but a recent change in my glasses frames has made the 750's extremely...

Hello All,        After quite a period of contentment with my Ultrasones I find myself in a position of needing to change out my work 'phones.  I work in an 'open' office with cubicles separated by open-top dividers.  Isolation is crucially important as there are times when the office is...

Hello All,       It's been quite some time since I've had the opportunity to post here as my DIY audio life has been fairly inactive since completing my beloved Bijou.  Unfortunately I am experiencing issues with what has quickly become my hands-down favorite amp.       A bit of brief...

Hi All, As is usually the case around here the upgraditis bug has hit me pretty hard...again. Ninety percent of my headphone-based music listening happens at work. There are about 10 people sharing the open space that is the engineering side of my office so closed cans are a must (not only...

I do the vast majority of my lengthy listening sessions at work. I'm a mechanical engineer and I spend a fair amount of my time at the computer working in my own world. My motivation for music at work is two-fold: 1. I love working to music and do better when I can. 2. The gentleman that...

Morning All, I populated my second CK^2III board that I'm going to be using in my work setup along with a pair of new A900s. I took a page out of others design books by putting the toroidal transformer in it's own 'wall-wart' box with an umbilical running up to the box. All parts are those...

Evening all, Thanks to many of the vinyl gurus around here I have gotten setup with what I'd like to consider a fairly decent 'entry' level vinyl setup. I've got two decent TTs (both vintage) and am working on building a tube pre-amp as my first pre...now that those two areas are covered...

Hey all, I've spent the last couple of weeks finishing up a few small projects (case work and little things) and have been reading up on p2p amp building specifically with tubes. I've been reading both of Morgan Jones' books and feel I'm ready to tackle my first project. As I've just...

Morning All, I'm having the hardest time finding an empty 'wallwart' style enclosure to stick my toroidal transformer in to finish my CK2III. Any recommendations? AMB? Ferrari? I've seen each of yours and either one looks like the perfect solution. Thanks!

Hi all, I'm very much interested in getting started in the vinyl world, hopefully without spending too much for my first deck. I found both of these on my local CL and am going to probably pick up one of the two. I've read decent things about the Pioneer but know nothing of ADC or vinyl in...

So I've been thinking about getting into vinyl for quite some time. A couple weekends ago I was helping my mother clean out her garage when I stumbled across this all boxed up: All I know is that it's older than I am and was supposedly considered quality back in...

So it's pretty evident I'm in this hobby for the duration (at least until I move somewhere with a garage and can build my next race car) and have had a lot of fun thus far. I've made the traditional steps from CMOYs to PIMETAs to a couple Millett Hybrids and have just finished a DYNALO. I've...

Hey all, After spending the last month changing jobs, moving and generally being out of the DIY scene, I've finally been able to sit down and finish up my Dynalo. After powering the board up with two treads and no opamps installed I took initial measurements of DC offset and found 47 mv in...

Hey all, I finally got the xformer I've been waiting on from Avel Lindberg (great price!) and have wired everything up. The board seems to be working well except the output voltage hovers around 10.8V (unloaded) and I used the parts spec'd for +- 15V. I used a 10k resistor for R10 and the...

Quick question: I'm about to pull the trigger on an Avel Lindberg 50 VA 2x25V Toroidal. I've read the Dynamid doesn't draw more than 800 mA...am I alright with this X-Former? http://www.avellindberg.com/transfor...ange_specs.htm (I'm looking at the Y236206)

Morning All, After some time off (letting the wallet heal ) I've ventured into my next amp project. After success with the diamond buffered millett hybrid I decided I wanted a more advanced SS design to work with. I currently have enough boards for a balanced DynaMid and a single ended...

Happy Holidays Head-Fi! I'm at a crossroads in my audiophile experience and need some advice on what to do next. A bit of background: my Head-Fi journey started a couple months ago when I built my first CMOY. Being an engineer I was initially attracted to the DIY aspect of this hobby, I just...

Hey All, Having completed my first Millett Hybrid I'm eager to start on another. Ultimately I'd like to be able to take the first to work for both listening/eye candy and this second one I'd like to max out and use here at home. I don't mind which board revision I end up with as I've...

Hey all, I'm taking a break from my Alien DAC building to put together a PIMETA in an H659V case for a X-mas present. The parts list is completely stock with OPA2132PA/132PA and single BUF634s running off a single 9V. I've got everything wired and soldered but am only hearing a very, very...

So I've cut my teeth on a smattering of DIY headphone amps (CMOYs, PIMETAs and a Millett Hybrid) and am hooked. I've currently got a couple larger headphone amps in queue to start building (PPAV2 & Dynahi) as well as a few Alien DAC boards so I'm covered on future projects for headphone amps...

Having just finished a CMOY And a Pimeta with Panasonic FM caps, class A biasing, stacked buf634s and AD8620/8610 opamps. Thanks again to Tomb, Tangent and everyone else for answering all of my amateur questions (The current panel components are temporary hence the less-than...

I've spent the last half hour or so reading through past issues experienced by TREAD builders and mine doesn't seem to match a previously covered problem. After finishing assembly I plugged my TREAD in and crossed my fingers. Nothing blew up. Sweet. I checked the voltage before the regulator...

I've spent quite a lot of time recently poring over these forums and others absorbing this vast amount of knowledge. I just completed my first amp (cmoy) and am hooked! I've got the pcb and most of the parts for a pimeta but am left with a few last minute questions. Any and all help is much...