Hi HF'ers...  Its been a while since I regularly posted here.  I'm pretty much in lurk mode, although I still completely enjoy music listening almost every day.  So when Jays reached out to me for some assistance reviewing their newly released Q-Jays version II, I happily accepted the...

Does anyone know how to do this mod?  I have seen scattered pics across the www.   thanks!! http://www.canuckaudiomart.com/details/649105507-sennheiser_hd650_with_a_hd600_frame_and_he60_baby_orpheus_earpads/images/691679/

(noob warning alert!!)   Something I have been wondering... can a low/unity gain opamp circuit (cmoy or similar) be used as an impedance matching stage between an OTL tube circuit and a low-Z headphone voice coil?

I was PM-ing with another member about an OTL tube amp whos builder claims he does not use output / coupling capacitors.  That got me scratching my head, because I am not familiar with any commercial tube amp that does not use capacitors on the outputs.  What other ways are there to block DC...

Curious, how hard is it to fit HE60 earpads onto the HD650/580/600?   I saw this old FS thread and got to thinking.... thanks!!   http://www.head-fi.org/t/699924/sennheiser-hd-650-with-a-hd-600-frame-and-he60-baby-orpheus-ear-pads-sold    

Curious.. anyone still have one of these?  Years ago I used to love bringing my HD580 to meets and listening to this amp.  There were always 2-3 at local meets here in the bay area.

Something I have always wondered....   Can I use two separate stereo amps to power one headphone?   Using a Darkvoice 336 as an example, because I am familiar with its bigger brother 337 having owned it for a couple years.  The 337 I think is just two 336 circuits running dual mono in the...

I have always used DVD players as my source, because I have a large collection of live concert DVD that I listen too.  I don't really watch them, just hit play and listen to the audio.  I stream the data via either toslink or coax to my dac.  The current players have USB ports.  Can these types...

Sorry if this is old content, I've been away from HF for a few years.  Fast forward to today, are there alternate earpad options for these cans?   Another member mentioned using Shure earpads as replacements.  Has anyone tried this and how do you get them to mount / attach?  Any pics you can...

Quick question... Is cat-5 cable a good choice for DIY RCA?   I need to make a one-in 3 out "Y" cable to distribute my line out to 3x different amps.   thanks!!

A couple years ago I plugged my headphones directly into my RCA line outs from my DAC.  My DAC uses a single OPA2107 at 16V on the output to direct feed the RCAs.  The line output was ear-bleedingly loud, serious tinnitus-ville.  I forget which headphone I tried this with... I think it was the...

In a 24V Morgan Jones / earmax are these two electrically compatible? (ignoring overall height dimensions)   6GW8 http://www.drtube.com/datasheets/6gw8-rca1965.pdf   6GM8 http://www.shinjo.info/frank/sheets/035/6/6GM8.pdf   thanks!!

Hey HFers... First off my apologies if this is in the wrong forum.  I'l just delete and re-post it as needed.  A LOT has changed since I last posted regularly.   Anyways, I was wondering if anyone here is amping (or has tried and didn't like) their single ended HE-400 with an output...

Not sure where to post this...  Mods I am sorry if this is off topic, please just delete if it is against rules.  I just wanted to give a heads-up that this at least appears to be a scam of some sort.  Possibly a chinese coin-scam.  Definitely pay with paypal and do not wire transfer the $$ ...

Curious... these seem to always fly under radar with their tube siblings getting all the press.  In the past I have found good things from tube amp designers who venture into solid state... most notably the eddie current ECSS and singlepower square wave.   Anyone have opinions on the LD MK V...

Curious.... Anyone on HF prefer to use discrete OP amps?  There was a thread yesterday asking if amp technology has really changed that much over the last decade, and AFIAK discrete OP amps (as comercial products) are one of the newer developments.   I have some older amps, (PPA, cmoy)...

Curious... These cans use that twist-locking mechanism to secure the earpads... they're also ~$80 a pair.  The cans have a pronounced "rim" around their perimeter.  I see a lot of headphones with earpads that you stretch over the rim to secure them, like the K240 series.  Has anyone tried...

Not sure where to post this...  I'll try here for starters.   So a transformer takes in 110/220 @ 60Hz from the wall, surrounds an iron core with "hot" coil windings.  A magnetic field results.   Lower voltage AC is produced by a secondary coil thats immersed in the field.   If a strong...

Something I have always wondered, with high impedance headphones (seemingly) on the decline... why are amp makers still predominantly making high impedance OTL amps? For every high-Z headphone theres (at least) 5-10 low-Z, and for every ~5 high-Z OTL amps theres one non-OTL?  It seems they are...

Sorry for the noob-ish question...  I have been away from head-porta-fi for a while.   Is there a player that behaves just like an ipod, in that it plugs into USB and integrates seamlessly with iTunes and plays apple lossless?

So in my never ending desire to de-clutter my night stand music station, and leave the macbook streaming on my computer desk.  I think the airport express will pretty much do what I need. Can someone sanity-check me on a few bullet points?   -How is the AX in terms of reliability?  How...

Has anyone had prior experience with both?...  Looking for general feedback, comments and preferences.   Do they offer anything, or is there anything they do that the K701/702 can't.  I have an old, well used K701 (bass-shy serial number era, although I personally don't find it bass shy at...

Do you own a tube tester? What model?... and why did you chose that one? How do you go about getting it calibrated? (or is that even necessary?) Is there a modern, current production tester thats better than the older vintage ones?   Is there an affordable "basic tester"?... something...

PC as source noob alert... Is anyone using a cloud network storage as a source for music files? How do you sync your music/media player to the cloud network to stream the files? Is there compression in doing so...  are lossless files truly lossless when they are played this way?

Curious... could I use a pair of these kits in a single ended, output transformer coupled rig for my power hungry K701? I am more familiar with OP amp DIY, so any general feedback / commentary is appreciated.   Google searching the TDA2003 brings up several discussions and positive commentary...