Hi All I am hoping to build a valve headphone amplifier to compliment my HE 560's. I haven't a great deal of experience in construction, but do know one end of an iron from the other. Can anyone suggest a suitable project please? Not looking to spend a great deal on this one, as it's pretty...

Good morning everyone. Hoping for advice please? I have just upgraded my headphone amp to the Oppo HA-1, It arrives Tuesday next.  Stage B in the upgrade process is to replace the DT770's with something a little more accurate. For domestic "keeping the peace" reasons I would prefer a good...