INTERVIEW

AN INTERVIEW WITH JANUSZ ROGOŻ. 3RP3/BBS

“Hi-Fi Choice”, nr 05/2014

HFC: Janusz, for how long have you worked on the design of this stand, which is noticeably different from earlier designs?

JR: The concept of the 3RP3/BBS was developed in 2007, but its implementation was made possible only after we developed the Balancing Board System — BBS. The finished design was ready in 2013.


It looks like that it took some time. Please familiarise the readers with the concept of this design
The structure of the 3RP3/BBS model is based on the ability to influence the physical properties of the load-bearing structure by using material of non-uniform structure combined with steel metric rods placed inside the legs, which are used to set the tension between the legs and the load-bearing tops. This allows the characteristics of the material to be matched to the variable dimensions of the structure. The BBS separates the worktops from the load-bearing structure. This solution combines the advantages of point support (minimum contact surface allows the kinetic energy of vertical vibrations to be transformed to heat) and dampening of horizontal vibrations thanks to counterbalance, sliding friction and rolling resistance.


Why exactly is this solution innovative?
So far attempts were made, in the field of audio, to achieve a similar effect using another kind of structure — with intermediary elements in the form of balls placed between two beds — but the disadvantages of this solution outweighed its possible benefits. A ball bearing needs to be hard, which means that it resonates in the high band, which in turn hardens the sound and needs to be dampened by lowering the density of the material. If the density is slightly lowered, only the resonance point lowers, whereas if the density is lowered to much greater extent, the contact surface increases and the structure does not provide point support any more.

The BBS helps to avoid this?
The Balancing Board System solves this problem by enabling contact between the bed placed in the worktop and the intermediary element in the form of a section of a rotating ellipse, which has its own bed in its base as the support for the apex of the anti-vibration cone. Point contact between these elements prevents their movement along their axis but enables a swinging movement. The intermediary element is made of carbon polymer with a very small friction coefficient and adequately reduced density to eliminate resonance in the applicable acoustic range. Therefore, the contact from the side of the bed located in the top doesn’t have to be a point contact, as this type of contact is provided by the apex of the cone. The entire system allows balancing isolated masses on the sides, while minimising mutual contact and dampening vertical and horizontal vibrations.
Can you specify what the 3RP3/BBS stand is made of?
We used the following materials:
Balancing Board System: beds in the tops – A10X steel • intermediate elements organic carbon • cones — NZ3 steel with higher silicon content
Supporting structure and tops: legs – sandwich MDF + carbon steel S235JR core • tops – sandwich MDF + HDF.

Thank you for the interview. I wish you continued success.
Thank you.