In the JDsLabs web, there is the option to order the CMoy optimized for Grado headphones for free. I am not really sure if this means a different OAmp (like the CMoy RA1 in Ebay). Do you know more about this?

Hey, guys. I just picked up a Grado RA1 for the heck of it, and it sounds pretty great with most of my Grado headphones. Although, I don't think it has very good synergy with my Alessandro MS1s... It sounds kinda' harsh at times. So anyway, I'm just curious why this headphone amp holds such high...

It's hard for me to find the original 4.7uf solen for this amp. Can i use this instead of the original capacitor? Will it sound worse?

I have sold my Grado RS-2 Cans and are now looking to buy the Denon AH-D7000. I still have the Grado RA-1 amplifier but will it be enough to drive the Denon AH-D7000 or do i need something more powerfull?    Kind regards    Nicolai 

  I have sold my Grado RS-2 Cans and are now looking to buy the Denon AH-D7000. I still have the Grado RA-1 amplifier but will it be enough to drive the Denon AH-D7000 or do i need something more powerfull?    Kind regards    Nicolai 

does anyone know where i can buy a psu for the ra-1 ac, in uk???? drew a blank at maplin and RS. cheers

I don't know much of anything about amps, and I don't want to spend more then 100$, but I want to get the most out of the Dt 770s I am about to buy. I have looked around, and the JDS cmoy looks good, as well as the fiio e11. I then came across this one...

Hey guys, long time head fi browser first time poster here :)   I bought my first decent pair of headphones about 10 months ago ( AKG K550 ) and I'm looking to make a bit of an upgrade. Now, I don't want to spend hundreds of dollars here so a new pair of cans is out of question. What i'm...

For some strange deranged reflex impulse insane reason, I purchased yet another headphone Tuesday. It was the Sony 7506. See, it's this board which can sometimes make you do crazy things. The V6 is not available here, so based on the discussion on the similarity to the 7506, I decided to demo...

Im thinking of getting an RA1 to compliment my arriving RS1, but Im concerned about its humming problems that that current/previous RA1 owners in this board are complaining about. Especially in sensitive cans like the RS1. Others say its dead silent. What is your personal experience with the...

max 1000euro (used also good for 1000)

I know there are many LCD-2 verses...threads... But I would like to hear some comparative comments and opinions on those who have or had both and how they feel about Rock on these two headphones (especially for electric guitars). I know the Grado RS1 are extremely colored in the upper...

I am really happy with the Grado GS1000 headphones..and have found that the Black Dragon recabled version I prefer VS the stock version. Spoke with John Grado about this a few Fridays ago, and the GS1 was in fact made and tuned on the RA-1 amp, so it is not a huge surprise that those mate...

Hi,   Recently my grandmother bought me a pair of Grado SR325is as a surprise. I will mainly be using these headphones in study hall and at home. I am in need of an amp that I can just put in my suitcase or backpack and take along. I was looking at the Grado RA1 but I am not sure if it is...

Hi I got the Grado RA-1 Amplifier and put some batteries in and now I need to change them. The only thing is i can't get the batteries out! They are in there pretty tight. Unless I didn't insert them in the right way? Anybody got any ideas? I appreciate all input.

Hi,   I have a Grado RA-1 headphone amp.  It uses 2 9v batteries. I'm not sure if they are serial or parallel. Does anyone know the best way to modify the unit so I can plug it into an ac outlet?  I guess I could definitely use 2 9v ac adapters and hook each one to a battery clip in the...

  Hey guys, I just got my Mapletree Ear HD+, on Saturday morning, from Olias (who is an awesome dude, I'd buy from him again, any day) and I am so impressed.   I read a lot about the pairing of the RS1 and Mapletree and there's no surprised it's that raved about. They pair so well, it's...

Hi, I am looking for a headphone amp around 400 dollars for my HF-2 headphone, better be small size, about same size as Grado RA1 and Graham Slee NOVO, bettary powered is prefered. Don't need much features, I only care about the sound.   Anyone have any suggestions? Appriciated.

Ok, I'm not going to revive all the old threads about Grado being a $300 box with $30 worth of parts. Oh wait, in a sense, I just revived it. In any case, I just took possession of a battery powered RA-1. The unit is light. Build quality is ok: the wood is certainly nice but prone to...

I have a Marantz sa8003 cd player. one music hall amplifier and one grado ra1 can i hook my cd player with my music hall amplifier, and then hook the pre output on music hall amplifier with grado ra1? would the tones be changed?   thank you

I fell in love with my grado 225i. Decided to take a huge upgrade. Got a RS1i, a RA1, and a nice lineout for my gen 4 ipod. Burned them in and sat down for a listening session (jazz, rock) friday. Woke up to ear ringing sat and it continued today. My problem is I don't think I can turn the...

How is this as a headphone amp? I'm considering buying one, and currently own a pair of Alesssandro Music Series Headphones. I know it may be overkill for these phones, but I plan on upgrading in the future. Will I notice a big difference in performance? (I have no experience with any kind of...

Anyone used one of these? http://cgi.ebay.co.uk/ws/eBayISAPI.d...768597593&rd=1 or this one? http://cgi.ebay.co.uk/ws/eBayISAPI.d...767198410&rd=1 and this one? http://cgi.ebay.co.uk/ws/eBayISAPI.d...767753906&rd=1 Comments?

I just bought a Grado RS1 with a Grado RA-1 amp and I love it.  I was just curious for when I do upgrade, what that upgrade should be.  If there are other threads already talking about this, sorry (not really), I felt this was more specific and is a question I, among many others, would love a...