The perfect loudspeaker would only radiate sound from its drive units and the cabinet would be completely silent. Traditional wooden cabinets have limited strength and the air pressure variations inside the cabinet, created by the drive units, causes the cabinet to vibrate, generating sound. This sound will be out of time with the drivers and results in a ‘muddled’ and distorted sound. Trying to eradicate this problem, many manufacturers have designed cabinets which resist these air pressures, employing materials such as aluminium and carbon fibre, but this does not resolve the problem.
Every time the speaker cone moves the chassis tries to move in the opposite direction, causing vibration which passes into the cabinet. Wooden cabinets flex and vibrate with this energy, converting it to heat and unwanted sound and for years this has been the acceptable solution. Ultra-rigid cabinets do not let this happen and instead this energy becomes trapped in the cabinet and over time the energy builds, finding a weak link in the system where it escapes resulting in a high frequency ringing noise.
Since inception, AVID has placed energy flow at the heart of all its designs. Every system creates vibrations, those you want and those you don’t and the key to good sound reproduction is separating those vibrations at source, making sure the ‘bad’ vibrations have a path-of-least-resistance to an ‘energy sink’ where it can be harmlessly eliminated. With our turntables this resulted in the massive Acutus sub-chassis and for our loudspeakers, we developed the Tuned Mass Technology (TMT)™ damping system, which tackles the problem of unwanted energy at source.
Through extensive experimentation, we found that having a suitable mass loosely coupled to the drive unit creates an effective path for this unwanted energy. With all other paths now ‘High Impedance’, the easiest path for energy flow is to the TMT™ damper. Being decoupled, the damper can freely vibrate, dissipating any energy internally resolving the problem BEFORE it even leaves the drive unit, so the cabinet does not need any specific treatment itself. The benefit is instantly obvious with a clean, focused sound, greater clarity to the music and vocals becoming etched within a transparent soundstage.