Most audiophile-quality cone and dome drivers exhibit a Sound Pressure Level (SPL) of about 88-90 dB, at an on-axis distance of 1 meter, for an input of 1 watt (2.83 volts RMS across 8 ohms). This is many times the efficiency of typical planar diaphragm radiators, having the same radiating area. However, cone and dome drivers with SPL's higher than about 91 dB (re: 1 watt) usually possess a Qts (total Q factor) that yields poor damping and less than good impulse and step responses.
Varför har element med högre känslighet än 91db sämre impuls och step response?
Att det har med dämpningen verkar han ju mena men på vilket sätt påverkar dämpning impulsegenskaper? Mer dämpning borde ju ge sämre impulsegenskaper?
På ett annat ställe i texten säger han detta.
"Jazzy-looking" cone and dome materials (often made from yellow-colored, "bullet-proof" materials, such as Kevlar) usually exhibit poor internal damping properties, resulting in an impulse response characterized by considerable overshoot and subsequent ringing. Kevlar, and similar materials, while providing rigidity, lack proper internal-damping properties required for good impulse response and truly flat frequency/phase response. As a consequence, Kevlar cones (and domes) are generally confined to applications in loudspeaker designs using higher-order crossover responses, where impulse, step and phase responses are not considered important by the designer. Cones and domes made of metal (such as titanium) or ceramic are even worse because these materials provide virtually no internal damping properties, resulting in poor impulse response, poor step response, etc.
Även här pratar han om dämpning, denna gång i konmaterialet. Att han förespråkar "papperskon" verkar ju klart. Men stämmer det han säger? Varför är det så många som gillar dessa hårda koner om det nu är så dåligt?
