Grace Design m920 Discussions | Drop

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Grace Design m920

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patrck

Jan 18, 2016

http://headphone.guru/grace-m920-high-resolution-monitoring-system/ The review states m920 handle low impedance headphones well. Have anyone tried 600ohm headphones like beyerdynamic T1 on m910 ?

Jan 18, 2016

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weasel0x00

Jan 18, 2016

patrckI've had a pair of 600 Ohm Beyer DT880s in it, and it sounds great!

Jan 18, 2016

mohb

Jan 19, 2016

patrckyou asked this on the previous page.

Jan 19, 2016

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patrck

Jan 19, 2016

mohbThanks for your information, Mohb. Sorry I found reviews after seeing your short reply. I couldn't find review about the m920 driving 600 ohm headphones. That's why I hope I can get more opinions about how m920's handle 600 ohm impedance headphone before I buy a non-returnable $1500 DAC.
The user in amazon stated "not an amp for headphones of larger impedence" http://www.amazon.com/can-nicely-drive-600-headphone/forum/Fx23IT8BWDJ0XUU/Tx2V20H19B0PQRY/1/ref=cm_cd_naredir?_encoding=UTF8&*Version*=1&*entries*=0&asin=B00JGZJD4O
This review stated " lower impedance headphones are ideally suited ". http://headphone.guru/grace-m920-high-resolution-monitoring-system/

Jan 19, 2016

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mohb

Jan 19, 2016

patrckI've got 600Ω dt990s, and they get plenty loud, and sound plenty good. You can run the numbers, but there isn't much more to be said (136mW@600 might seem *low*, but it isn't). Unless you have some particularly inefficient headphones, it should get earsplittingly loud without leaving the linear domain.
I think it would be helpful to post what you've got now.

Jan 19, 2016

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patrck

Jan 19, 2016

mohbThanks for help! I have Beyerdynamic T1( 600 ohm ) and Audeze LCD-2 (70 ohm). My main digital player is AK JR. JR drives LCD-2 beautifully. T1 sounds good but just doesn't have the dynamics and details as LCD-2. Adding Bravo Ocean tube amp does bring back the dynamic but also lost the some details. So I am looking for a good DAC/digital AMP which is really capable to drive 600 ohm T1 with same or better details and dynamics currently I have on LCD2.

Jan 19, 2016

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mohb

Jan 20, 2016

patrckI looked up the t1's and the specs claim 102db/mW, so, at 136mW, it should get crazy loud.
I have heard the t1's are very picky. Maybe your best bet would be to find a local meetup to give a bunch of amps the run through. Like you said, it's expensive.
I get a lot of work done with the various inputs and outputs on the grace, so while I'm not always using the headamp, it does get used quite a lot, and I enjoy everything with it. The background is as pure black as black can be, so I know what I'm hearing is in the recording, not noise.

Jan 20, 2016

CalebRoberts

Jan 21, 2016

mohbHow about we identify the limiting factors for an amp's ability to drive high-impedance headphones? The higher the impedance, the lower the current required. It's all down to how high the voltage amplitude must be in order to deliver the desired power output. Perhaps it seems a bit awkward to have to derive this from a power spec - dBSPL/mW. This becomes a discussion of how deafeningly loud do you need the output to be. I hate to think of our equipment contributing to anyone's hearing loss. Some who comment on an amp's capability of driving high impedance phones may be convolving loudness with other qualities. When I hear discussion of tube amps I think harmonic distortion. Yes, perhaps tube amps on the market may be configured to drive higher voltages - perhaps deafen you faster if you turn it all the way up. But, perhaps the user who prefers the tube amp is actually preferring the elevated THD.

Jan 21, 2016

mohb

Jan 21, 2016

CalebRobertsyay voltage swing!
I have no intention of deafening myself. Been a great unit so far. A very convenient 'heart' to my system.

Jan 21, 2016

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