Using headphone output from an intergrated amp

i have read this about tube amps but never solid state. i have used several integrateds as a pre to a amp with no load on the speaker outputs on the integrated. on every amp i have ever used when you plug the headphones in it bypasses the speakers. but i,m not the final word here by any means. what amplifier do you have?

For a solid state amp or solid state integrated amp it is fine to have only the headphones in use. For the vast majority of audio products that have a headphone jack, the output to the amplifier portion is 'disconnected/cut off' when the headphone is inserted into the headphone jack.
You should have zero problems, and no danger using your integrated amp with only headphones.. (as long as it is not a tube power amp, or an integrated amp with a tubed amplification section.)
(if the integrated has a tube or tubes in only the preamp section, and all solid state in the power amp portion, then you can just use the headphones, and it is OK with no load on the part for speakers)
The only way it would be a probleem is if you had tubes in the main amplifier portion of the integrated amp.
Good luck!
(I use headphones a lot late at night.)

I agree about SS integrateds. However, most integrated amps have poor to mediocre headphone amp sections. Some of them are ok. If you are really into headphones, I strongly suggest picking up even a cheap used dedicated headphone amp. Of course, depending on how hard your phones are to drive, your results will vary greatly. You can pick up a new Creek starting at $199, or a used MF V-Can, and many others. I hear great things about Woo and Audio-GD. I commend you to check out head-fi.org, both for recommendations and used gear.

Thank you,guys. Mateored's answer leads me to another question I have that's dedicated HP amp VS intergrated amp HP section.

I have the modest Pioneer Elite A 35R and the Rotel RA 1062 and so far I am okay with the SQ. My HP are the Senn. HD280 pro, Audio Tech. ATH A700 and both are closed HP. I will be receiving the Senn HD 595 from Amazon in a couple days. The HD 650 is much better as I read but I want to take time to test the water.