Toa HLS46UL-8 User manual

TOA SPEAKER SYSTEM
LOW FREQUENCY LOUDSPEAKER
HLS46UL-8
DESCRIPTION
The HLS46UL-8 is an 18" low-frequency loudspeaker
designed for professional applications in high level sound
reinforcement environments where high efficiency, super-low-
frequency range, and faithful reproduction are required,
such as studios, theaters, concert halls, auditoriums, discos,
and in live sound reinforcement applications.
The 46UL offers exceptionally high power handling capacity,
ultra-linearity in the super-low-frequency range, and a uni-
form frequency response from 20 Hz to 500 Hz. A crossover
frequency of 500 Hz or lower is recommended to obtain
smoothest overall system response. The loudspeaker em-
ploys a low-mass 4" (100 mm) diameter voice coil of edge-
wound copper ribbon on an aluminum coil form, which
operates in a flux density of 13,600 gauss. The voice coil is
driven by powerful double ferrite magnets, which are sup-
ported by a rugged diecast aluminum frame. The cone sus-
pension is made of exceptionally high compliance cloth
surround, damped.
FEATURES
1. Smooth, extended super-low-frequency response.
2. High power handling capacity: 240 watts continuous
pink noise: 720 watts continuous program input.
3. High efficiency and ultra-linearity in super-low range.
4. Low distortion.
5. Voice coil of edge-wound copper ribbon, with an alumi-
num coil form.
6. Powerful double ferrite magnet structure.
7. Rigid diecast aluminum construction.

SPECIFICATIONS
Nominal Diameter 18 inches (460 mm)
THIELE-SMALLPARAMETERS
Nominal Impedance
8ohms
fs (Resonance Frequency)
28 Hz
Power Capacity
Continuous Pink Noise*
1
240wattsRMSofband-limitedpink noise
Re(D.C.Resistance) 5.0 ohms
Q TS (Total Q) 0.28
Continuous Program
Sensitivity*
2
(40 Hz to 1 kHz)
720 watts
95 dB (1W /1m)
Q MS (Mechanical Q)
Q ES (Electrical Q)
V AS (EquivalentVolume
Compliance)
V ID (LoudspeakerVolume)
3.3
0.31
12 ft
3
(0.34 m
3
)
0.32ft
3
(0.009m
3
)
Frequency Range
20 Hz to 500 Hz
Highest Recommended
Crossover Frequency
500Hz
Effective Piston Diameter 16 inches (400 mm)
ηοηο (Reference Efficiency) 2.3%
Effective Moving Mass
Flux Density
Voice Coil Diameter
0.21 kg
13,600gauss
4 inches (100 mm)
MOUNTING DATA
Overall Diameter 18.3 inches (464 mm)
Bolt Pattern Diameter 17.3 inches (440 mm)
VoiceCoilMaterial
Edgewound copper ribbon
Baffle Cutout Diameter
Front Mount
Rear Mount 16.6 inches (422 mm)
16.5 inches (420 mm)
Coil Form
Aluminum
DIMENSIONAL DIAGRAM
Depth 8.86 inches (225 mm)
Weight 46 Ibs (20.8 kg)
Standard Accessories
Mounting Screws and Nuts...............each 8
Notes
1. *
1
Duration of power capacity test is 24 hours. Speaker unit is mounted in a 160-liter vented box.
2. *
2
Measured at 1 watt and 1 meter using band-limited pink noise (50 Hz to 500 Hz) under the condition
that speaker unit is mounted in 180-liter vented box.
3. Positive voltage on plus (RED) terminal gives forward diaphragm motion.
*Specifications are subject to change without notice.
2nd Harmonic Distortion
(1m, 6.25W to 400W, 180-liter vented box, sine wave)
CHARACTERISTIC DIAGRAMS
Frequency Response
OK
Measured at 1 watt and 1 meter using swept
1/3 octave
pink noise under the condition that speaker unit is
mounted in 180-liter vented box.
(1m, 1W to 3.13W,
180-litervented box,sine wave)
Impedance 3rd Harmonic Distortion
(1m, 6.25W to 400W, 180-liter vented box, sine wave)
Measured under the condition that speaker unit is
suspended, with cone in the vertical plane, in the
“free-air”.
Power Linearity
(1m, 1W to 400W, 180-liter vented box, sine wave)
(1m, 1W to 3.13W, 180-liter vented box, sine wave)
TOA Corporation
Printed in Japan (305K) 833-64-813-4A