From Beyond (1986)

Driven by ambition and shrouded in mystery, the Resonator promises to unlock the elusive sixth sense, yet its power comes at a terrifying price. Its inventor lies dead, his partner consumed by madness. Undeterred, a determined psychiatrist seeks to harness the machine's potential, reigniting the experiment with unforeseen consequences. Her pursuit of scientific breakthrough tears a hole in reality, unleashing a malevolent force from a parallel dimension. Now, she must confront the horrors she has unleashed, or be consumed by the encroaching darkness. The fate of both worlds hangs precariously in the balance.