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Please reccommend a Sound Card & Head Set Combo - Page 6

post #51 of 59
Quote:
Originally Posted by chinesekiwi View Post

what? Swapping out stuff is the worse thing you can do to the O2. Both are 'plug and play'. the O2 is the definition of 'plug and play'.
Why would you screw up a flawless design?

doh.gif

You don't change the design, you change the parts out for better ones. For instance, you can get higher quality capacitors, you could get better op amps (one of the op amps can be replaced with one of these http://bursonaudio.com/DIY_HD_Opamp.htm and I am fairly confident that the other two can as well).

The design is not flawless......all amps have some type of issue and can be made better if you have the time and desire.
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post #52 of 59
Quote:
Originally Posted by mikeaj View Post

I'm not a kiwi (and kiwis may have different interpretations than mine), but O2 has a gain switch, and the combo has lower noise. Therefore, it's better for sensitive IEMs and other sets.

Most likely, the by-the-book benchmarks for the O2 and ODAC are superior, but superior numbers doesn't necessarily translate to a better experience (especially if the difference is below detectable levels anyway, which it might be... and probably well below any distortion and inaccuracies from the headphones). Sometimes they do, but not necessarily.

Magni has slightly higher output power levels if you want to try HE-6 or other insensitive headphone and want an extra dB or two of volume.

I agree. The difference is going to be incredibly small if noticeable at all. The big thing is that the O2 has been around for a while and has been sitting at that price for a long time. The Schiit magni and modi only came out a few months ago at a very aggressive price. That is the only reason for the price difference.

Performance, mehhh I am going to agree with mikeaj, but I am not so sure that the magni and modi wouldn't pull slightly ahead. It would be a VERY close race.

Also, don't forget that there are MANY places to buy the O2 amp. It is an open source amp, so you have all sorts of 'basement businesses' that are trying to sell these things at more competitive prices.
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post #53 of 59
oh yeah, re: swapping op amps and other stuff

More-expensive options can easily be worse, even if it looks like you're just bumping a capacitor value or something like that. I wouldn't say the design is sacred (certainly not flawless) and you shouldn't touch it, but the designer did test a number of things and probably understands more about the parts than you do. The choices were optimized for good performance and low cost, with the restriction that all parts be through-hole.

For example, it might be really hard to find a better DIP-8 part for the output stage, but you could easily get some higher-performance parts if you really wanted, with an adapter. They just might lower the battery life and be more expensive, etc. Many parts would require a circuit redesign though.

For gain stage, the NJM2068 was lower noise than most of the others, and the distortion is dominated by the output stage anyway. A higher-performance part could give you lower overall amp performance (check the article here). Then again, the noise might be overkill too.
post #54 of 59
Thread Starter 
At the moment I'm dealing with letting Schiit know to go ahead and send the Magni without the Modi and the Modi around March 5th. Sent the an email as their website said they prefer email contact over phone. When I called them, they weren't kidding because an answer machine picked up.

Kills me a bit because as of 10 mins ago the HD650 arrived and are plugged in and on my head. biggrin.gif Sweet solid head set. Pic when the entire thing is set up.

Side question guys:

Burn IN - suggestions is to leave it on medium for 200 hours or so before cranking them up? I see different numbers in different reviews for proper burn in. Leave'em running all day/night I presume?

I didn't see any threads regarding burn in on OCN.

Thanks.

Edited to add - NVM - found it http://www.jlabaudio.com/burn.php

Converted my iTunes to Apple Lossless . If there's anything else I'm missing feel free to let me know.
     
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post #55 of 59
Quote:
Originally Posted by mikeaj View Post

oh yeah, re: swapping op amps and other stuff

More-expensive options can easily be worse, even if it looks like you're just bumping a capacitor value or something like that. I wouldn't say the design is sacred (certainly not flawless) and you shouldn't touch it, but the designer did test a number of things and probably understands more about the parts than you do. The choices were optimized for good performance and low cost, with the restriction that all parts be through-hole.

For example, it might be really hard to find a better DIP-8 part for the output stage, but you could easily get some higher-performance parts if you really wanted, with an adapter. They just might lower the battery life and be more expensive, etc. Many parts would require a circuit redesign though.

For gain stage, the NJM2068 was lower noise than most of the others, and the distortion is dominated by the output stage anyway. A higher-performance part could give you lower overall amp performance (check the article here). Then again, the noise might be overkill too.

In other words, there no need to change it as it results in zero human-ear-noticeable improvement at the risk of of worse performance and greater monetary cost, which was my original point, albeit, not worded the best. The only thing you can adapt without the risk of screwing it up is what outputs it has.
post #56 of 59
Quote:
Originally Posted by Arizonian View Post

Burn IN - suggestions is to leave it on medium for 200 hours or so before cranking them up? I see different numbers in different reviews for proper burn in. Leave'em running all day/night I presume?

I didn't see any threads regarding burn in on OCN.
If you want to achieve the so-called HD 650 sound, you might want to start wearing down the pads. Mechanically the drivers / suspension / damping should change a bit over time with use ("burn-in" procedure? whatever you want is probably okay—just don't pump ridiculous volumes into them and burn them out), but the primary effect is from the pads wearing down, which causes the positioning of drivers relative to the ear to change (and enclosed air volume in cups, etc.).

For example, check here:
http://rinchoi.blogspot.com/2012/04/introduction-it-is-generally-known-that.html
post #57 of 59
Thread Starter 
Quote:
Originally Posted by mikeaj View Post

If you want to achieve the so-called HD 650 sound, you might want to start wearing down the pads. Mechanically the drivers / suspension / damping should change a bit over time with use ("burn-in" procedure? whatever you want is probably okay—just don't pump ridiculous volumes into them and burn them out), but the primary effect is from the pads wearing down, which causes the positioning of drivers relative to the ear to change (and enclosed air volume in cups, etc.).

For example, check here:
http://rinchoi.blogspot.com/2012/04/introduction-it-is-generally-known-that.html

Thank you for the info. That was helpful. smile.gif
     
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post #58 of 59
Thread Starter 
Final Update:

Well I started my search 20 days ago and the out of stock Modi arrived today via UPS. After a ton of reading, learning, with guidance from fellow OCN members my Sennheiser HD650 sitting on single Woo Stand with Schiit Magni & Modi combo is sitting on my desk for $760. wheee.gif





Sound is amazing listening to this incredible headphone now that's it's completed with the Shciit DAC / Amp combo allowing me to hear the full depth.

I'm very sad to report however it did ruin sound on everything else I own and I have a feeling this was just a small dip in the audiophile pool for me. I'd like to take a bath in a good speaker system now but I'm going to have to give my wallet a break after a ton of other upgrading and sit back and enjoy my 'cans' for the time being. biggrin.gif

Once again thank you everyone who gave their advice, opinions, PM's, and answered questions when directed at them. Being busy you guys shaved a TON of time by directing me. Big Thank you. thumb.gif

See you guys in the OCN Headphone Club. smile.gif
     
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post #59 of 59
And after spending only almost double your original budget! biggrin.gif

That's audio for ya, anyways glad to hear you're enjoying the new setup.
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