Harmful energy is an established phenomenon in audio replay that is often looked upon as a highly complex problem. This perception is misleading. It is true that the assessment of the phenomenon is complex, but dealing with it can be straightforward if it is addressed in a structure way.

When designing the Black Ravioli products we have split the effect of such energy into the following categories:

It is reasonable to assume that most audio systems are not considered much beyond direct influences, but to fully experience high fidelity audio the combined impact of all three categories during system operation need to be considered. This scenario presents a much more complex set of events and one where the system boundary is never the same, where manufacturers can only make assumptions about how their equipment will behave, and the isolation products normally used to combat the direct threat can have limited benefit.

Identifying how, where, when and to what extent you apply the mitigation in a whole system solution is key. Too much absorption does little for the musical experience, like wise too much isolation emphasises frequencies.


To consider all of these aspects and arrive at a balanced solution, we have undertaken a whole system analysis for a typical audio system in operation. This included:

We imposed the hard constraint on the assessment that no claim should be made on the equipment support (table) with respect to vibration; only stability and load capacity were assessed. In placing this constraint we allow the continuing the use of existing tables as part of the solution.

The current range of Black Ravioli products considers the above issues and presents a flexible, structured and cost effective energy control solution. It is a passive system that aims to mitigate the threat coming from vibration for all three categories. It does it by separation, collection and dissipation methods that are applied in proportion to the assessed threat from vibration.