# BHK Signature 250 or 300 Tube Rolling

**URL:** <https://forum.psaudio.com/t/bhk-signature-250-or-300-tube-rolling/2652>\
**Category:** Amplifiers\
**Created:** [November 24, 2015, 11:13am UTC](https://forum.psaudio.com/t/bhk-signature-250-or-300-tube-rolling/2652 "2015-11-24T11:13:01Z")\
**Posts on this page:** 1\
**Showing post:** 293

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**Author:** ![Tubes](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/tubes/32/95706_2.png) [@Tubes](https://forum.psaudio.com/u/Tubes)\
**Post date:** [May 24, 2021, 10:26am UTC](https://forum.psaudio.com/t/bhk-signature-250-or-300-tube-rolling/2652/293 "2021-05-24T10:26:20Z")

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Does anyone know if the BHK amps have adaptive auto bias?

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