When you think of Soundgarden’s Superunknown you immediately think of its sheer sonic weight. It’s heavy without being muddy, musical yet menacing and no song captures that balance quite like “Spoonman.” Producer Michael Beinhorn’s approach to recording the bass on that track is a perfect example of how subtle engineering choices can create monumental results.
Beinhorn revealed that the foundation of the bass tone may have been an Ampeg SVT, a classic choice for its powerful midrange growl and unmistakable punch. Yet what truly sets this recording apart is what he added beneath the surface literally.
He fed the bass signal into a DBX 120X-DS Subharmonic Synthesizer a unit famous for generating an octave below the fundamental frequency. To reinforce this he also patched in one of the subwoofers used during the drum recordingsallowing the subharmonic content to be physically felt as much as heard.
“When you solo an instrument with it it’s very noticeable” Beinhorn explained “but when you hear it in the track you’re never going to make that out. It just adds extra weight to it which is very nice.”
That statement sums up Beinhorn’s production philosophy. His genius lies in what you feel rather than what you hear. By subtly layering a synthesized sub octave beneath Ben Shepherd’s performance Beinhorn added an almost subconscious sense of mass. The result is a bass tone that doesn’t just sit under the mix it anchors it tying together Matt Cameron’s drums and Chris Cornell’s towering vocal in one seismic pocket.
It’s a reminder that true production mastery isn’t always about obvious tricks or flashy tones. Sometimes it’s about the invisible frequencies that move the air the listener and the song itself.
