Nord Piano 5 headphone output - to amp or not to amp?

[Aeolian]

Greetings,

First post here and excited to say my brand new Nord Piano 5 is on its way to my music store for me to pick up in a few days. In the mean time, I got antsy and pulled the trigger on various pieces of equipment to complement my new piano, mainly some Yamaha HS5 monitors to play at home and a pair of Sennheiser HD600.

My question is around this last bit of equipment and is addressed to those of you using the HD600s or any other high impedance headphones. I have read on some posts that the P5'a headphone output is powerful enough to drive 300 ohm headphones and others saying an amp would be needed.

Just before posting this, I also read an interesting reply from user wtibbit who confirmed the P5 actually outputs +4 dBU. Not being very well versed in this field, does this tend to confirm I should be good without an amp or should I still keep an eye out for a small budget amp to help me "get there"?

I know I could wait a few days and come up to the right conclusion by trying it out by myself, but there is a small FiiO K7 amp on sale right now and I might want to pre-emptively pull the trigger before the deal is gone.

Thanks in advance!

[cphollis]

Not to encourage you to buy more gear, but ...

When I use pair of HD600s with my P5 , it's great for practice and noodling around, but more is possible. I run mine through a full channel strip on my mixer (preamp, compression, reverb, EQ, etc.) which can get surreal results. Also, a small sub in the room is nice.

I think you'd be just fine with what you have.