Currently I use an HiFiman HE-500 driven by an EHP-O2 (O2+ODAC). The HE-500 is an awesome/crisp/highly detailed headphone but I would like to improve the amp/DAC part. My budget is not that big (max. 400€) but I don't mind buying second hand.   I've found the Audio GD NFB-11 to be an...

MacBook Pro (Retina, 15-inch, Early 2013) > Audirvana Plus > Sennheiser HD-598 phones.   I'm deciding between: >Magni2 Uber / Modi2 Uber >Vali / Modi2 Uber >O2 / ODAC >Magni2 Uber / ODAC etc..   Which would pair best with my HD598s?   Right now the Magni2 Uber / Modi2 Uber seems like...

ive been reading threads over different headphones but if im going to spend hundreds of dollars on headphones i figure i might as well try to get as much info as posible. I listen to a range of music so i guess an all around pair would be best- punk,indie,pink floyd,radiohead, phish kind of...

After spending countless hours researching and a failed experiment with the Fiio E10K, I need some help . . . I'm looking for a desktop amp (or Amp/DAC) that can specifically handle IEM's, in particular the Klipsch S4 and Sony MDR-7550. I tried the Fiio E10K and it sounded muddy and didn't...

Hi Seeking some views with real life experience. It seems from my reading that there's not much difference at all between the new Schiit entry products (modi 2 uber and magni 2 uber) and the (Jdslabs) odac/O2 But wondering what your views might be so as to look at what way I should lean...

Jude has kindly agreed to lift the ban on discussion of the works of banned members to allow discussion of the O2 headphone amp. However, please pay attention to the following before posting, otherwise this thread is likely to get locked:   1.This thread is about the amplifier, not NwAvGuy...

Currently my only DAC/AMP is a Fiio X5. It works great on the go and as an external DAC/AMP for my PC at home. I have Beyer DT770 80-ohm.   Problem is at work...   I sometimes like to play Spotify Premium while I work during the day. There is no wifi in my office and I don't want to use cell...

Any recommendations regarding the best gain settings for Sennheiser HD598? The standard settings are 2.5x/6.5x. Are they good or should I use custom ones?   Thanks in advance!

I guess I am going to need a better source amp for my Beyerdynamic T1's.. Gear   Emotiva XPA-2 Emotiva UPA Emotiva ERC-2 Emotiva XDA-1   Marantz PM8004   I USE THIS MOST connect right to the headphone out. I have found it sounds better than my two headphone amps below.  ...

I got out of the shower and smelled the oh so familiar smell of burning electronics in my apartment.  After some blood hounding, I traced the smell to my JDS O2 headphone amp.  When I picked it up, it was hot to the touch.  I opened it up and found this:       I ordered some new NJM4556AD...

Hi! I just bought Odac and o2 amp combo and I began a search for new headphones to use with it within 200$ I was wondering, would DT990 pro sound great with that combo or will it be too bright? Are there any other headphones in this price range that can compete with DT990? Thanks! :)

Hello,   Im looking for a new headphone amp around $150.   Im looking at schitt Vali and JDS labs O2   Which would be better for pairing with a sennhiser hd600 ?

I know that the O2 is very large and is considered transportable than portable.    However I want to know if the O2 performs vastly better or just about the same but with more power than the C5 amp   And are either of the batteries user replaceable?    How long does the O2s battery last? 

Has anyone done a side by side comparison?    I previously owned a Portaphile 627 which was said to be comparable to the L3 but I didn't find it much better than my Fiio E11.  

All the amps i own i assume have a break in period. But the JDS Labs O2 in particular was wondering if it actually requires a break in period. I think i read somewhere that it doesn't does anyone know for sure ? That would help me out Alot ^_^

Some questions:   1) Would this be the best amp available for my K550 at the $300 price range?   2) Can you plug the O2+ODAC to the wall outlet indefinitely or do I need to remove the plug every xxx hours? (note: I do not plan to move the O2+ODAC. I plan to make it a permanent desktop...

Hey everyone,   I recently got the momentums and like them a lot so far. My major issue is with the mic/control cord. I have seen others speak of degraded sq with it but my experience is specifically with using it with my JDS O2/ODAC hooked up to my computer.   When I plug in the phones to...

My PC runs 24/7 and even though I won't be pumping out music 24/7, my sound components won't be turned off.   Can anyone give me advice on which can handle 24/7 operation better? Schiit stack or O2/ODAC?   Thanks

This question probably has a simple answer, so here it goes. I purchased a pair of Beyerdynamic DT 660 headphones for listening to classical music. I simply have them plugged directly into my PC, and this makes sense since their impedance is 32 ohms. The product came with the 6.34 mm adapter...

Hey!    So, I'm new here, and I'm new to this whole high quality sound scene.  I've pretty much decided that I'll be getting the following setup today or tomorrow, unless someone changes my mind.   Headphones: Beyer DT990 600 ohm  Amp: O2/ODAC    Am I doing this right?  Also, anyone know...

I apologize, I'm a complete noob when it comes to this stuff, but any help would be appreciated :) I'm currently running this setup:   xonar dg > 3.5mm jack on the card > 1/8 inch to 1/4 inch adapter > grado sr225i   However, I have a little bit of money to spend on upgrading this setup...

Alright, I've learned my lesson. I jumped on a set of Razor Tiamat 7.1's for $200 and quickly noticed the audio and bass clarity were not near what I was hoping. So I actually sat down and started doing some research, and I think I've hit a snag in some info that hasn't been quite discussed...

I have a pair of dt770 pro 80 headphones, the DG can drive them okay, the volume has to be kind of high but they still sound good. I've asked about other amps before, but what I'm really curious about is the DAC. The Xonar DG is a 35 dollar sound card, while the j2labs stuff is well over a...

Greetings everyone, I recently switched from a windows based PC to a Mac running Mavericks (OSx 10.9). From the beginning, I noticed some very obvious clicking and static during music playback. My set up is, and always has been, Computer > ODAC > O2 > headphones. Music playback was...

This isn't intended as a review, but as the start of an Objective 2 appreciation thread. I've had the Objective 2 + ODAC Combo for a couple weeks now and I absolutely love it. I may be late to the party, but I believe there are at least hundreds of other O2 owners out there that probably...