H&H Extension by Tombo Audio

More Than Just Adding Height to Your Audio Rack

In high-end audio systems, sound quality does not depend solely on the equipment itself.
Equally important is the mechanical environment in which those components operate.

The H&H Extension by Tombo Audio is designed to address this critical factor.
Its purpose is not merely to increase rack height, but to control mechanical vibrations that directly affect sonic detail and clarity.

What Is the H&H Extension?

The H&H Extension is an accessory module for the Black Diamond Audio Rack and Black Diamond Audio Rack Mini by Tombo Audio.

It functions as an extension module between rack shelves to:

1. Increase spacing between audio components
2. Control the transmission of mechanical vibrations
3. Reduce mechanical interference that degrades sound quality
4.  

The concept behind H&H stands for Height & Harmonics, referring to the creation of optimal space and mechanical conditions that allow musical details and harmonics to be reproduced more naturally and completely.

Design Philosophy: Directional Vibration Control

Height Increase with Purpose

Increasing the distance between components helps to:

1. Reduce direct vibration transfer between devices
2. Minimize heat accumulation
3. Improve the mechanical independence of each component

These effects are based on fundamental physical principles and have a real, measurable impact on audio performance.

Vibration Path Control Structure

The H&H Extension employs a structure that:

1. Limits contact points through which vibrations can travel
2. Uses rigid materials selected to minimize vibration reflection

As a result, vibrations generated by audio components are:

1. Guided away from the chassis in a controlled direction
2. Prevented from reflecting back into the internal circuitry

This approach is comparable to the concept of a mechanical diode, allowing vibration energy to flow outward without returning to the source.

Impact on Sound Quality

The H&H Extension does not alter the tonal character of the system.
Instead, it reduces mechanical interference that masks fine musical details.

Commonly observed improvements include:

1. A quieter background
2. Greater depth and dimensionality of the soundstage
3. More stable vocal images and instrument placement
4. More natural and extended decay of high-frequency details
5. Reduced listening fatigue over long sessions
6.  

Suitable Audio Components

The H&H Extension is particularly effective with vibration-sensitive equipment such as:

• CD Players / Transports
• DACs
• Preamplifiers
• Tube Amplifiers
• Network Streamers

Systems with a solid mechanical foundation will perceive these improvements more clearly.

Who Should Consider the H&H Extension?

1. Users of the Black Diamond Audio Rack or Black Diamond Audio Rack Mini by Tombo Audio
2. Audio systems that have already been properly set up at a basic level
3. Listeners who value clarity, soundstage depth, and fine detail
4. Those who wish to fine-tune their system without replacing existing equipment or loudspeakers

Conclusion

The H&H Extension by Tombo Audio is an engineering-driven accessory designed to work seamlessly with the Black Diamond rack system, improving the mechanical operating conditions of high-performance audio systems.

It does not add sound.
It removes interference.
Allowing the music that already exists to be revealed with greater completeness and naturalness.