[elliotm]

I have ASUS Xonar D2X
ASUSTeK Computer Inc.

It overpowers my Grado SR60 cans, easily. (I've had these phones for years.)
Grado SR 60 @ HeadRoom - Right Between Your Ears

I also have Ultimate Ears super.fi 5 Pro, but cord is way too short to practically use. Yes, I could get an extension, but if the D2X blows away the Grados, I fear trying my UE's would be superfluous.

Sooo, could the D2X power Sennheiser HD 595 with no issue?
Sennheiser HD 595 @ HeadRoom - Right Between Your Ears

SR60 has 32 impedance and HD595 has 50 at 1kHz. I know little about this subject, so will the D2X/595 be a good match? How about HD650 (300 impedance)?

Primary use for the cans will be music (lossless, of course) and gaming.

Thanks for all insightful replies.

 

[triggerc]

It should be able to drive the HD595 decently, but it is highly unlikely that a pc sound car will be able to drive 300ohms to any satisfactory resultst.

 

[asuka10456]

yep, the ASUS Xonar D2X can drive the 595's

 

[elliotm]

I got the Sennheiser PC 350 which have a imp of 150 Ohms and Xonar does just fine. Bass Boost CMOY offered no improvement.

 

[cheezies]

Both my PSP and Zen drive my HD595 decently, so the Xonar should be fine. But my HD570 on the other hand ...

 

[joshd]

Drives mine fine.

When I am feeling in the mood for "loud", max output on the card is pretty much as loud as I'd want it on the headphones without it being uncomfortably loud.