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E30
APPLICATIONS
These 12”high efficiency - high sounding quality low-midrange
drivers have been designed to perform well in the 60Hz - 2500 Hz
frequency domain where human hearing is so sensitive.
They can equip two-way or multi-way sound reinforcement
systems of small to medium throw, when AES power handling does
not exceed 250W.
Recovery with a 1”HF comp. chamber is simple, while
recommended acoustical loading is Bass-Reflex from 40 to 50L
depending on the low roll-off required, and tuned from 53Hz
to 57Hz.
FEATURES
Power handling capacity 250 W AES
Reference efficiency(1W @ 1m) 98 dB SPL
SPL max (continuous) 118 dB SPL
Usable frequency range 60-3000 Hz
Environmental withstanding Outdoor
DESIGN CONCEPT
DEFLECTION CONTROLLED DIAPHRAGM optimized for dynamic
damping. DEFLECTION CONTROLLED DIAPHRAGM technology consists
in optimizing the shape and material of the diaphragm so that it
works as a mechanical transmission line, to avoid breaking modes
as well as mechanical threshold which destroy sound quality.
This leading edge technology offers substantial sonic advantages.
Among them: sound coherency, fast transients, stable sound
imaging, high sensitivity, wide frequency range and reduced
directivity pattern.
VENTED COMPACT MAGNET SYSTEM. It has been carefully
optimized to obtain maximum transducing efficiency while
avoiding unlinear behavior such as coil inductance variation with
position, flux modulation, harmonic distortion, rest position offset,
air compression and off-axis voice-coil pushing.
Its design incorporates a T-shaped and vented pole piece,
and a flux stabilization ring. It also takes into consideration
demagnetization at cold temperatures.
INTERCOOLER SYSTEM (patented). Entirely integrated into the
loudspeaker itself, the INTERCOOLER SYSTEM extracts the heat
produced by Joule effect in the voice-coil by the means of an air
flow directed through the heatsink rims of the basket by the
motion of the dust-cap and the spider.
The gain brought about by this technology is over 20 % of extra
power, so for example, a 3”coil according to this design has
the same power handling capacity as a classical 4”one.
ARCHITECTURAL SPECIFICATIONS
NOMINAL DIAMETER : 300 mm.
FRAME : High tensile alloy pressure
die-cast basket with patented
INTERCOOLER SYSTEM.
MAGNET SYSTEM : 2.5” highly
energized, heat extracting design
with vented pole piece and flux
stabilizing ring.
VOICE COIL : High-temperature
stabilized copper-clad aluminum
ribbon wound on high-strength glass
polyimide former.
CONE ASSEMBLY : High-strength
cellulose fiber cone and central
dome impregnated and front-coated
with damped resins, fitted with
high-compliance treated double-roll
fabric surround.
SPEAKER MASS : 6.40 kg.
PROFESSIONAL SERIES
8 Ω
12” Low Midrange Drivers
High Efficiency
High Sounding Quality
4550
4560
16 Ω