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#Speaker enclosure design principles driver#
Similarly, as we said with the 10.25inch driver unit of Borg, a great 8inch will not beat a great 10.25 incher, but it can deliver a full range performance with only a small compromise on maximum SPL. With KIM, we wanted to design a speaker we would use ourselves, forcing us in the direction of an 8inch mid-bass driver. Materials technology and better adhesives have allowed massive changes to power handling, maximum excursion, and reliability, encouraging smaller drive-unit systems. The classic two-way loudspeaker went from being an eight-inch with a 19mm tweeter to a six and a half to a five or even four-inch mid/bass, and at the same time, tweeters generally moved to 25 or 29mm. The trend since the 80s has been for slim loudspeakers, which has necessitated the use of smaller mid/bass drive units. *There will be more explanation in the KIM White paper Like all design elements, there are arguments favouring both, but to simplify it here * masses of stuff tends to ‘slow’ the speaker’s sound but possibly give it a more hi-fi sounding but less fun or involving performance. These Helmholtz resonators in anti-phase to the standing waves cancelling them without the deleterious use of masses of absorbent material.įor years the argument has raged among loudspeaker designers between those that ‘stuff’ their boxes full of polyester fibre or sheep’s wool or other ‘magic’ absorbent and those who prefer a relatively empty box. Strunk absorbers are used inside the enclosure to remove standing waves. Designing for the lowest radiated energy is almost impossible without the benefits of laser interferometry and FEA. The sides and rear of the enclosure utilise a similar technique, but the panels are only a single sandwich.īracing is one-dimensional to avoid the unnecessary spread of panel resonances common in modern loudspeaker designs. Multi-layers of MDF panels glued together with a new unique damping adhesive form the front baffle, which is then precision CNC routed. The sculptured front baffle of KIM reducing in width from 300mm to 205mm around the AMT is to aid high-frequency directivity and minimise diffraction. We think of loudspeaker system design as something where the integration of the parts is a positive-sum game. It’s pointless to design and manufacture state of the art drive units and engineer crossovers with perfect knits if the cabinet is singing along with the tune. We have talked before about the signal to noise ratio of a loudspeaker cabinet, and it is still one of those fundamentals in our thinking.
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The construction centres around two critical tasks: to hold the drive units still in space and to radiate as little energy as possible. FinkTeam cabinets or enclosures are always works of art inside and out.