ID30C-8/ID30C-16/
ID30CT
Medium-Power
Compression Drivers
General Product Description
The ID30C-8, ID30C-16 and ID30CT are heavy-duty
compression drivers for use in medium-power public address
installations.
The drivers employ rugged phenolic diaphragms, 1.5-inch
diameter voice coils and “rim centered” ferrite magnet
structures for long life and reliability under extreme operating
conditions.
A hinged cycolac rear housing for easy access and
connection to a sound system, via a BX conduit connector,
is provided together with a plug-in, field-replaceable
diaphragm assembly.
The transformer model (ID30CT) includes connections for
25-V and 70-V distributed systems and a screwdriver
operated power-tap select switch.
The exterior parts are injection-molded from polycarbonate,
and all metal parts have been tropicalized for resistance to
high humidity and fungus.
Ideal for both indoor and outdoor applications, these drivers
are well suited for any installation requiring rugged,
medium-power performance.
Architects’ and Engineers’ Specifications
The loudspeaker(s) shall be of the compression-driver type
utilizing a rugged phenolic diaphragm and a
high-temperature rated, 1.5-in. diameter voice coil.
The loudspeaker(s) shall exhibit essentially flat power
response from 300 to 4,000 Hz with a smoothly rolled-off
response beyond. Their sensitivity, when mounted on a PH
horn, will be 107 dB (1 W/1 m) with a 500- to 5,000-Hz
pink-noise signal applied.
Specifications:
Frequency Response:
300-4,000 Hz, ±5 dB (see Figure 2)
Power Handling, 8 hours, 6-dB crest factor:
30 watts
(500- to 5,000-Hz pink noise)
Impedance,
Nominal
:
ID30C-8 ...................................................................... 8 ohms
ID30C-16 .................................................................. 16 ohms
Minimum, on Cobreflex Horns, Above 500 Hz:
ID30C-8 ................................................... 7.5 ohms (850 Hz),
ID30C-16 .................................................. 14 ohms (850 Hz),
Sound Pressure Level at 1 Meter, 1 Watt Input Average, Pink
Noise Band-Limited from 500 to 5,000 Hz:
see Table I
Voice-Coil Diameter: .......................................... 3.81 cm (1.5 in.)
Magnet Weight
: ................................................... 0.28 kg (0.63 1b)
Magnet Material
: .................................................. Strontium ferrite
Flux Density
: ................................................................. 1.00 Tesla
Construction:
Rugged weatherproof finish for outdoor use
Dimensions,
Diameter: ...................................................... 10.6 cm (4.2 in.)
Height:
......................................................... 13.2 cm (5.2 in.)
Net Weight,
ID30C-8/-16:
..................................................... 1.6 kg (3.5 lb)
ID30CT:
............................................................ 2.1 kg (4.5 Ib)
Shipping Weight,
ID30C-8/-16:
..................................................... 1.8 kg (4.0 Ib)
ID30CT:
............................................................ 2.3 kg (5.1 Ib)
Recommended Horns:
Cobreflex IIB, Cobreflex III, PH, 2WP, SMH, SH
COMMERCIAL
The loudspeaker(s) shall be capable of handling a 30-watt,
500- to 5,000-Hz pink-noise signal with a 6-dB crest factor
for a period of eight hours.
The loudspeaker(s) shall have a diameter of 10.6 cm (4.2
in.) and a depth of 13.2 cm (5.2 in.). They shall have a 2.41
cm (0.95 in.) throat opening with a 1 3/8-18 thread for
mounting.
The loudspeaker shall be the ID30CT, which includes a 70-V/
25-V line-matching transformer (see Table II) and weighs no
more than 2.1 kg (4.5 Ib), and the ID30C8, which has a
nominal impedance of 8 ohms (or ID30C-16 with 16-ohm
impedance) and weighs no more than 1.6 kg (3.5 lb).
