Toa HLS46UL-8 Specification Sheet
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 uniform 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 edgewound 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 suspension 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 aluminum coil form.
6. Powerful double ferrite magnet structure.
7. Rigid diecast aluminum construction.
SPECIFICATIONS
Nominal Diameter
Nominal Impedance
Power Capacity
Continuous Pink Noise*
Continuous Program
Sensitivity*
2
Frequency Range
Highest Recommended
Crossover Frequency
Effective Piston Diameter
Effective Moving Mass
Flux Density
Voice Coil Diameter
Voice Coil Material
Coil Form
18 inches (460 mm)
8 ohms
1
240 watts RMS of band-limited pink noise
(40 Hz to 1 kHz)
720 watts
95 dB (1W /1m)
20 Hz to 500 Hz
500 Hz
16 inches (400 mm)
0.21 kg
13,600 gauss
4 inches (100 mm)
Edgewound copper ribbon
Aluminum
DIMENSIONAL DIAGRAM
THIELE-SMALL PARAMETERS
fs (Resonance Frequency)
Re (D.C. Resistance)
Q
TS
(Total Q)
Q
MS
(Mechanical Q)
Q
ES
(Electrical Q)
V
AS
(Equivalent Volume
Compliance)
V
ID
(Loudspeaker Volume)
ηο ηο
(Reference Efficiency)
28 Hz
5.0 ohms
0.28
3.3
0.31
12 ft3 (0.34 m3)
0.32 ft3 (0.009 m3)
2.3%
MOUNTING DATA
Overall Diameter
Bolt Pattern Diameter
Baffle Cutout Diameter
Front Mount
Rear Mount
Depth
Weight
Standard Accessories
Notes
1.
*1Duration of power capacity test is 24 hours. Speaker unit
2.
*2Measured 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.
18.3 inches (464 mm)
17.3 inches (440 mm)
16.6 inches (422 mm)
16.5 inches (420 mm)
8.86 inches (225 mm)
46 Ibs (20.8 kg)
Mounting Screws and Nuts...............each 8
is
mounted in a 160-liter vented box.
2nd Harmonic Distortion
(1m, 6.25W to 400W, 180-liter vented box, sine wave)
CHARACTERISTIC DIAGRAMS
Frequency Response
Measured at 1 watt and 1 meter using swept
pink noise under the condition that speaker unit is
mounted in 180-liter vented box.
Impedance
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)
1/3 octave
(1m, 1W to 3.13W,
OK
3rd Harmonic Distortion
(1m,
6.25W to 400W, 180-liter vented box, sine wave)
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
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