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Fullrange-Speakers™
by Andrea Ciuffoli - starting in the April 2008

INTRODUCTION

I am starting with this projects to test one of the best full-range drivers and to check the result of horn speakers.

COMPONENTS

declared specifications of AC-2B
Frequency Response (in recommended housings) :	20 Hz - 20.000 Hz
Efficiency :	97 dB / 1W / 1 m
Loadability (in recommended housings) :	50 W nom. / 100 W mus.
Impedance [R] :	11,3 Ohm
Compl. Impedance [Z] :	16,0 Ohm
Resonant frequency :	32,0 Hz
Mechanic Q-Factor Qms :	5,57
Elektric Q-Factor Qes :	0,83
Q-Factor Qts :	0,73
Equivalent volume [VAS] :	350,0 Ltr.
Xmss :	4 mm
Induction :	2,0 Tesla
Depth :	7,5 cm
Bore Diameter :	19,0 cm
Mass :	4,8 kg

PROJECT

The project follows the Mauhorn XII see on Lowther Loudspeakers System.

MEASUREMENTS

Here are some plots generated in my room at 2m with my Clio system by Audiomatica.

Actually I have used these drivers for only 20h so the startup phase is still at the begin.

Follows the measurements in my room with the enclosure complete empty.

Follows the measurements in my room with the enclosure with some dacron.

Follows the measurements in my room with the enclosure with more dacron.