Bang & Olufsen Stereo Width Control Box (Headphone Adapter)

 Product Overview

The unit shown is a Bang & Olufsen Stereo Width Control Box, a compact accessory designed to adjust the stereo image when listening through headphones.

This device allows the user to control how “wide” or “narrow” the stereo signal appears, making headphone listening more natural and less extreme. It was developed during the early stereo era, when recordings often had very hard left/right channel separation.

With its simple analog design, the unit blends the left and right channels to create a more balanced and comfortable listening experience.

Function

The Stereo Width Control works by:

• Mixing left and right audio channels in varying degrees

• Reducing extreme channel separation

• Creating a more centered and natural soundstage

Adjustment Range:

• NARROW (3) → More mono-like sound

• 0 (Center) → Standard stereo

• WIDE (3) → Maximum stereo separation

Key Features

• Adjustable stereo width control (rotary knob)

• Headphone output (¼” jack)

• Passive analog circuit (no power required)

• Compact metal housing

• Classic Bang & Olufsen minimalist design

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Cabinet

• Material: Aluminium / metal front

• Design: Compact inline box

• Color: Silver with black base

🔄 How It Works (Simple Explanation)

1. Stereo signal enters the unit

2. The knob adjusts how much left/right signal is mixed

3. Output is sent to headphones

4. Result:

   • Less listening fatigue

   • More natural stereo image