Originally Posted by KamijoIsMyHero
Also saying the magni is not powerful enough for dynamic headphones is nonsense. Most headphones barely need a milliwatt of power just to reach 90 dB.
Where did I say that?
All I said is that you do not need to be very careful with Dynamic headphones like the HD600, DT880 (600) and other harder to drive dynamics - because you will have more of the volume pot to play with. I do realise that we do not need nearly as much power as some want to think, but it doesn't mean you suddenly lose all range on a volume pot.
Also I'm not denying that I mean the volume pot at all. I said that you do not need to worry about the volume pot with the HE400 too much, but that being careful applied to using sensitive cans with them. Note the original question never posed the idea of using sensitive headphones with them at all, hence my comment about dynamic headphones that were not all that sensitive.
On high gain on the Audio GD the HD600 for example sits less than 1 oclock in difference for me than the HE500 for similar volume. DT880 about the same as the HD600. I must listen a fair bit louder than you admittedly as the HE500 at 10-11 on high gain is around where it would sit depending on the recordings. Low gain I hear no difference but I'm putting a pot a bit higher up.
My Heir 4.ai can be used up to 9.00 even on high gain with no hiss or noise. Remember GD starts at 7 oclock
Anyway I think we'll agree to disagree. I apologize to the OP for derailing.
OP if you are intending to get the Magni for the HE400 it will be usable and will work perfectly for HD600, DT880, K701, Mad Dog and other cans of similar quality to the HE400. If you ever intend to use headphones with a can with higher sensitivity though, getting another amp instead of the Magni with a low gain mode may be preferable. If you do go the route of the O2/ODAC it might be worth looking into a build with the Unity gain/2.5x option for sensitive cans/iems.
Edited by UNIFi - 4/20/14 at 5:04am