dbx 4BX Range Expander, Hard-to-Find Audio Gem! - SOLD

The dbx 4BX is a sophisticated, high-performance audio signal processor designed to significantly enhance the dynamic range of recorded music. Originally introduced during the early 1980s, it stands as one of the most advanced dynamic range expanders in the dbx product lineup, blending technical innovation with audiophile-grade performance.

Internally, the 4BX features high-quality analog components and discrete circuitry, consistent with dbx's reputation for engineering excellence. Its signal-to-noise ratio and low distortion characteristics are well above average for consumer-level gear, placing it in a tier suitable for both professional studios and serious hi-fi enthusiasts.

The unit operates as a four-band dynamic range expander, a considerable advancement over its predecessors. Unlike simpler two-band or single-band expanders, the 4BX divides the audio spectrum into four separate frequency bands. This multiband approach allows for highly precise dynamic processing, enabling it to expand soft passages and transient peaks independently within each band. The result is a cleaner, more natural sound with minimal artifacts.

The 4BX also utilizes an ambience circuit, which is designed to enhance spatial imaging and the sense of acoustic space in a stereo mix. By introducing carefully managed phase and level adjustments, the 4BX creates a wider and more immersive soundstage, often revealing details that would otherwise be buried in a flat or narrow recording.

The range of versatility with this piece is extraordinary.  It is a real collector's piece, especially for the dox enthusiasts....You know who you are!  Really, though, the 4BX was a crowning achievement for the company and set the stage for digital range expenders and other signal processors that are used in music and movie production today. What the 4BX can do for stereo recordings, is something to experience.

Demos are encouraged in Andover, MA.

$549 (plus shipping and sales tax, where applicable.)