The membrane Hyper Exponential 3A allows the direct coupling of the woofer to the amplifier without insersion of selfs in series. The damping of the speaker is then optimum, it is that of the amplifier. With direct coupling, the damping will be > 80.
« Recall that when using a 6 dB / octave filter for the woofer, the series resistance is about 1 Ω, which brings back the damping coefficient to 7... compared to 80 !!! »
The internal resistance of the amplifier < 0.1 Ω : One will use strong section cable (2.5 mm² minimum). The boomer will be amortized and transient response excellent with very dry bass.
The membrane Hyper Exponential gives a natural fall to 2500 Hz by 6 dB per octave. The coupling of the two ways will be then with no filter for the woofer. The coupling of the two ways in « Phase Plus » will be at constant energy and constant phase.
Art & Acoustique Appliquée
