Posted on March 6, 2020March 6, 2020 by zetaBull Here’s the first prototype of the zeta sound BULL. With red indicating led and red knobs. BULL BULL The circuit board BULL circuit board BULL circuit board /Krister Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook More Share on Tumblr (Opens in new window) Tumblr Share on Pinterest (Opens in new window) Pinterest Share on WhatsApp (Opens in new window) WhatsApp Like this:Like Loading…