What about the ORIGINAL Grado headphone amp?? The Joseph Grado HPA-1?? How does it do compared to the RA-1 and the current crop of headamp offerings for Grados??

Thanks for all the input guys, I'm using a Mullard currently, think its the ECC83... or are they all ECC83??? Maybe I should drop a mail to Dr. Peppard and ask for his advice.

Quote: Originally Posted by kitaoji I liked both GE and RCA tubes with my Grados. Have you tried using a 5751 tube and 12AT7? Guys, thanks so much for the info... panda... I have not got the budget for a better amp, so it'll be this for a while... kitaoji.. i'm a...

Hi, I'm looking for a 12AX7 that will bring a more mellow and warm presentation of vocals on the HP2 when run from the MAD Ear+. Anyone's got any recommendations?? THanks

mm... how much are they going for right now?? Used... I mean.. Read in this thread that they do Grados very well.. would this include the HP-1000s? What about the extremely power hungry K340? Will the CGHA drive these as well??

Quote: Originally Posted by philodox Larry at headphile has never said that he modifies the drivers, where did you get this idea from? The screens are cut out and replaced with acoustically transparent fabric, the cotton is replaced/adjusted or removed entirely based on preference...

What a letdown that I was not the one to score that one, but really really good that it went to a Head-fier, at least to someone who will defintely appreciate them. Good for you!! Congrats and enjoy... The original HP2 at current asking price is way too rich for my blood but I've got a...

I'm confused, there's the Reference and then the Signature Standard and is there another one??? Which one was put on what? The HP1, HP2, HP3? Which was the original cable and whay was there a change? When did this change happen? Also, the 1, 2 and 3 are all running HP-1000 drivers right...

Anyone... I've been reading a bit about the Perreaux SXH2... anyone heard this with the HP-1000??

I was also looking at the Naim Headline 2. the Opera or the HR-2.. Any thoughts?

Sorry to dig up an ole thread... but what in the world happened to this?!?!?!?!

I've heard that the Melos range is excellent for the HP-1000, but I'm a bit concerned about who to turn to if the amp runs into any problems.. any thoughts?? rds... thanks for your offer.. what else can you do besides a PPA v2?? I'm curious and interested...

Need help on choosing an amp. Any recommendations are most appreciated. Thanks

Hi, I'm looking for ONE SINGLE amp to drive my K340 and Grado HP2. 2 very different headphones. Will the Yammy be a good match for any of the 2?? I know its good for low impedence phones so does that staightaway rule it out for the K340??

The HP1000 and the K340 will be my 2 main phones and am looking for an amp to drive them to their potential. The K340 is a beast to drive and the HP appears a lot easier, although they are very different phones. That is why I need your help. My current setup is in my signature. Source will...