Need to buy new phones for Christmas. Recipients are 4- and 6-year-old lively music lovers for whom I have bought a digital keyboard. For the parents' sake I will also provide headphones so the tykes can play to their hearts' content without driving mommy and daddy up the wall.    So not sonic...

I'm finishing assembly of a Sjostrom Audio QRV07, but got stuck. http://sjostromaudio.com/pages/hifi-projects/36-hifi-projects/93-qrv07-headphone-amp?start=4 Build instructions stop at the completed PCB. There's no description of chassis jacks, pot attachments, etc, so this novice is...

What do the cable DIYers and pros use for the approximately 1-inch-long sleeve that protects the cable at the point it enters the ear cup housing, and helps avoid too much flexing at a given point? From illustrations it appears that there are numerous possible solutions.   Exterior diameter...

Back in 2005 the Precision Electronics Corp. pot received a lot of praise here (and also at diyaudio). http://www.head-fi.org/forum/thread/144841/potentiometer-help But lately at least one of the same people who recommended it in 2005 has nothing good to say about PEC, and their pots get general...

Many thanks to Icarium for hosting the mini-meet at his home in Silicon Valley this weekend, and to Craig (see photo below beside an early production of his Balancing Act) for bringing his latest creation the EC 215. I was  apparently the only one who took any photos so I’ll post the...

For the front panel of a new headphone amp in progress, I need an elegant-looking, gold-colored 1/4" female jack. (The body inside the case can be any color, I'm mainly concerned about appearance of the exposed section outside the panel.) I had no idea this would become an immense research...

There was a great meet here in February, very capably organized by our hero Voltron, but not everybody who wanted to could be there, and many including this writer couldn't try enough cans and amps. Would anybody else like to hear more gear soon?   Via PM, Voltron suggested this Interest...

http://www.head-fi.org/forum/thread/500377/fs-sennheiser-hd800-headphone-only-local-pick-up-1050   I've corresponded offline with a prospective buyer, who says the seller has not revealed where he got the phones one month ago.     Might be worth a little investigation to ensure head-fi...

I had AKG-Harman replace my K240DF cable last fall, but today the bleeping thing is loose at the connection point to the can. The technical problem is that I get no left channel sound unless I pull up on the cable where it enters the  little housing.   I will contact their parts/repair...

Having had no engineering training (it was music instead), I am confused by all the data on amps and headphones, and by the plethora of amps on the market in all price ranges. I can't evaluate these suckers except by reading opinions, and opinions diverge. Is there a good source of...

First off -- thanks a million to Voltron for a super organizing job!! And to the friendly Head-fi'ers who let me try their phones and amps. This was my first meet, and it accomplished my purpose admirably in just a couple hours. I'd been wondering if I could hear the difference between my...

Does anybody (die lieben Deutschen in der Gruppe, vielleicht?) have a FR graph for the K240DF? I'd love to see a detailed review of those cans also. I read German easily, and can slog through most other Western European languages, in case someone has an old Stereoplay or comparable magazine that...

I ran across the URL for the K501 manual, helpfully posted on this board, and it gave me the idea to go hunting for the manual for my K240DF. Finally found it. In the process I took notes as to where the others were located. For those of you who want to know what the innards of your AKG cans...