PHL Audio 1660 User Manual

E17  
PROFESSIONAL SERIES  
1660  
1670  
8  
16 Ω  
6.5” Midrange Extended Drivers  
High Sound Pressure Level  
High Sounding Quality  
APPLICATIONS  
These models are the ”long excursion” versions of types  
SP1500/1510. They are dedicated to being used when applications  
require low-midrange extension capability together with high SPL.  
Their particular design ensures that they perform without any  
compromise in sound quality, making these models optimum for  
sound reinforcement systems as well as studio monitoring.  
Their preferred frequency domain starts from 400Hz (single unit)  
or 300Hz (dual driver) in direct radiation, while 200Hz is possible  
when horn is mounted.  
FEATURES  
Power handling capacity 250 W AES  
Reference efficiency(1W @ 1m) 97 dB SPL  
DESIGN CONCEPT  
PROGRESSIVE WAVE DIAPHRAGM optimized for low-midrange  
extended frequency domain.  
SPL max (continuous)  
117 dB SPL  
Usable frequency range 300-5000 Hz  
Environmental withstanding Outdoor  
The M17/E17 Series design is based on the PROGRESSIVE WAVE  
DIAPHRAGM mechanical behavior of the radiating area.  
In this principle, the membrane is considered as a mechanical  
transmission line which should receive a constant given velocity  
together with critical damping properties to work properly.  
ARCHITECTURAL SPECIFICATIONS  
NOMINAL DIAMETER : 166 mm.  
FRAME : High tensile alloy pressure  
die-cast basket with patented  
INTERCOOLER SYSTEM.  
This leading edge technology offers substantial sonic advantages.  
Among them : very low mechanical energy storage in the cone  
(avoiding standing waves) which ensures coherent sound, fast  
transients, stable sound imaging, high sensitivity, wide frequency  
range and very-low directivity pattern.  
MAGNET SYSTEM : 2”highly energized,  
heat extracting design with vented  
pole piece and flux stabilizing ring.  
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.  
VOICE COIL : High-temperature  
stabilized, copper-clad aluminum  
ribbon wound on vented high-strength  
glass polyimide former.  
Its design incorporates a T-shaped and vented pole piece,  
and a flux stabilization ring. It also takes into consideration  
demagnetization at cold temperatures.  
CONE ASSEMBLY : High-strength  
cellulose fiber cone impregnated and  
coated on both sides with damped  
resins, fitted with central carbon-fiber  
dome, high-speed flat damped  
surround and acoustacally damped  
rear cavity.  
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.  
SPEAKER MASS : 2.15 Kg.  

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