MGBrown Posted June 1, 2022 Share Posted June 1, 2022 32 minutes ago, Downunderwonder said: B for B. 0 for the lowest one. Not sure about the 2H but I believe he's talking about 2nd Harmonic, of something. Ah, makes sense, thanks. Quote Link to comment Share on other sites More sharing options...
crazycloud Posted June 2, 2022 Share Posted June 2, 2022 On 01/06/2022 at 17:28, MGBrown said: What is 'B0' and '2H'? B0 is 31Hz. See attached chart. 2H is second harmonic, 3H 3rd etc. 1 2 Quote Link to comment Share on other sites More sharing options...
agedhorse Posted June 8, 2022 Share Posted June 8, 2022 Cone damage (creasing) is always a result of too much power, exceeding the mechanical power handling limits of the driver. This can occur in both ported and sealed speakers, where the displacement (or the axial force) exceeds the ability of the materials to resist deformation. Generally it’s much easier to cause this damage in ported speakers driven below Fb or F3, but it can happen in a sealed cabinet as well. About 25 years ago, it was seen that an inherent design flaw in the cone edge design in many speakers was contributing to this as available amplifier power increased. An industry wide redesign of cone edges greatly reduced this tendency. The problem is similar to what we see in high voltage electronics, corona stress that occurs at sharp edges and bends, but in a mechanical device results in a high fatigue density of the paper, resulting in a crease over a fairly short period of time. 1 1 Quote Link to comment Share on other sites More sharing options...
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