# Mail Day Thread

**URL:** <https://lookmumnocomputer.discourse.group/t/mail-day-thread/101>\
**Category:** Uncategorized\
**Created:** [January 24, 2020, 7:14pm UTC](https://lookmumnocomputer.discourse.group/t/mail-day-thread/101 "2020-01-24T19:14:46Z")\
**Posts on this page:** 1\
**Showing post:** 2770

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**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\
**Post date:** [April 12, 2021, 7:52pm UTC](https://lookmumnocomputer.discourse.group/t/mail-day-thread/101/2770 "2021-04-12T19:52:05Z")

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Headphones are low impedance, and can in general not be driven by a single opamp.

EDIT: @analogoutput posted some variants [here](https://lookmumnocomputer.discourse.group/t/simple-headphone-volume-control/2403/3). Most use either a few opamps or dedicated low-power amps.

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