Whirlwind HBUC Passive Under-Counter Stereo Headphone Control Box

The Whirlwind HBUC is a passive stereo headphone volume control designed for engineers and integrators working in broadcast facilities, recording studios, and language labs. Because it requires no external power source, it simplifies installation in counter or table surfaces where running power is inconvenient or impractical — a direct advantage over active headphone distribution systems that demand rack space and AC access.

Its under-counter mounting profile keeps control surfaces clean and uncluttered, making it a practical fit for newsroom anchor positions, producer desks, interpreter booths, and studio control rooms. The HBUC functions as a passive attenuator, meaning it introduces no noise floor, requires no gain staging, and adds no signal coloration — critical in environments where audio transparency is a professional requirement.

For integrators spec'ing fixed installations where simplicity and reliability outweigh the need for amplification, the HBUC delivers a purpose-built solution that installs quickly, requires no maintenance, and keeps the signal path clean across stereo headphone outputs.