<p>Top part of right hand input chanel modules, with (from top): Gain control, high frequency EQ, midband EQ (switched centre frequency and Q), low frequency (switched turn-over frequency).
Blue buttons at the bottom offer two fixed, switched, high-pass filters.
</p>
Glensound Electronics GSNT 1/135 radio sound mixer, from BBC Manchester.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/30661871@N03">Richard Ash</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/30661871@N03/45618193405/">IMG_5680</a>