I'm wondering how common is it for the HE-500 headband to break? I ask because I used one hand to remove my HE-500s a couple of weeks ago and the round plastic clamp that holds the earcup slider broke in half. It's not like I pulled really hard or did anything strange when removing the...

If you're not an electrical engineer and are curious about how tube amplifiers work I have a webpage dedicated to explaining them in the most non-technical method possible. The page uses guitar amplifiers but the theory is pretty much the same. If you are interested please take a look and I...

I know many of you are like me and want to better understand how tube amplifiers work. I have created an easy to understand web page that details how every component in a tube amplifier works including how the rectifier, preamp and power tubes work. There's no math and I use a lot of graphics to...

The Robinette Box headphone to speaker amp interface has been mentioned in a couple of threads but interest seems to be growing now that head-fi member brunk is taking orders for a group buy. Send brunk a private message if your are interested in having him build one for you. The box is Open...

I just published a free headphone calculator for the Android. It has power calculator and resistor network calculator pages along with help pages. I'm still in the development phase so any suggestions for additions would be appreciated.   Rob   In the  Google Play Store search for 'headphone...

I have created a JavaScript webpage calculator and Excel spreadsheet that will help you optimize a headphone resistor network interface for your headphones and your speaker amplifier.     The Head-Fi Wiki article is here.   Instructions for the webpage are just below the calculator itself...

I mentioned this little balanced speaker amp in the "speaker amp for headphones" thread but this amp is such a great high output headphone amp I thought it deserved its own thread.   I picked up an $18 Stellar Labs desktop amp today from MCM Electronics. It's a Tripath TA2024 Class T based...

I have a balanced headphone cable DIY webpage that covers these cables:   Make a Four Wire Balanced Line Headphone Cable Make a HiFiMan HE-500 or HE-400 Balanced Cable Convert The HE-500 Headphone Cable From Single Ended to Balanced Make a 4-Pin Mini XLR to TRS 1/4 (6.3mm) or 1/8 Inch...

I gambled with $18 and ordered a generic Tripath TA2024 "balanced" push-pull amplifier board to see how it sounded as a balanced headphone amp for my HE-500 and modified T50RP headphones. I was pretty surprised by how good it sounded so I installed it in my TEAC UD-H01 DAC. The Tripath amp board...

Is it safe to drive my 38 ohm HE-500 headphones with my 40 watt per channel all tube amp? The amp has 4 and 8 ohm speaker taps so I'd use the 8 ohm tap and of course I wouldn't need to turn the volume up much but I don't want to hurt my amp. Thanks in advance.   Rob

I made what turned out to be a pretty nice hybrid balanced cable for my HiFiMan HE-500 headphones using very high quality Canare L-4E6S Star Quad cable. The details of the build are here: http://robrobinette.com/HeadphoneMods.htm#HE-500 I say "hybrid" because the cable's star quad wrap and...

I just finished converting my lovely AKG K240 Studio headphones from standard 3-wire single end to 4-wire balanced mode. It's pretty easy to replace the headphone jack's Male 3-pin Mini XLR jack with a Male 4-pin Mini XLR jack. For you K701 owners your stock headphone cable is a 4-wire so all...

I love the clean, accurate sound of my AKG K240 Studio headphones (unmodified) when combined with an Aune T1 DAC/Amp. Is the K702 similar but more accurate? Is the K702 Anni worth the extra $ ? Thanks for the help.   Rob