I have been listening to TV, YouTube concert video, Spotify etc. using my Onkyo TX-NR717 AVR and a pair of inexpensive RadioShack wireless headphones. They have given up so I started looking around for a replacement set. I am almost 63 years old and I thought I was pretty knowledgeable about tech. My head is about to explode. I started out looking at the Sennheiser 220 wireless set but I just wasn't convinced they would be satisfactory. You see once you start looking at this stuff the stuff you had will never do. Since my listening spot is only about 12 to 15' away from my sound system, I started looking at wired headphones. I was interested in the Sennheiser HD-598s, HD-600s or the HD-650s. On another forum, I was told I would need an amplifier. Back to the Bing page. Picked out the HD-598s and a Schitt Valhalla amp. Had the phones on the way when I asked a question of the Schitt people and was told via email, that those two products were not a good fit. Cancelled the order of the 598s. What I need to know is first, do I need an additional amp beyond my Onkyo? Will any of the above named headphones be problematic running on my AVR? When I was a kid we had a portable stereo record player with two detachable speakers. I would put on a stack of 45s (Peppermint Twist was a favorite) lay on the floor with the speakers pressed tightly against my ears. Worked pretty good. I do have a nice pair of Polk Audio 2 way book shelf speakers...
Some help clearing up some questions
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The Onkyo TX-NR717 can do a fairly good (decent) job of driving headphones (my Onkyo TX-SR706 did).
The Schiit Valhalla should do a really good job at driving headphones, but I think it might be a little over kill for your use.
Personally I think you should get some Beyerdynamic DT880 Pro 250-Ohm headphones and plug them straight into the headphone jack of the Onkyo receiver.
The Sennheiser HD-600 (300-Ohm) and HD-650 (300-Ohm) should also work fairly well plugged straight into the Onkyo.
Headphone jacks on receivers usually have a high impedance, so best to get headphones in the 250-Ohm to 300-Ohm range.
The Sennheiser HD-598s are only 50-Ohm (should still work decently with a receiver).
Also might need to get a 1/4" (6.3mm) to 1/4" (6.3mm) extension cable, like a 10 foot or 12 foot cable, as the cable that comes with the headphone may not be long enough.