Toa HLS46S-8 Specification Sheet

TOA SPEAKER COMPONENT

LOW-FREQUENCY LOUDSPEAKER

HLS46S-8

DESCRIPTION

The HLS46S-8 is a 460mm (18 in.) low-frequency loud­speaker designed for professional applications in high

level sound reinforcement environments such as studios,
theaters, concert halls, auditoriums, discos and live
sound reinforcement applications, where high efficiency,

ultra-low-frequency response, and faithful reproduction
are required. The HLS46S offers high power handling
capacity and a uniform frequency response from 20Hz to
3,000Hz. A crossover frequency of 1,000Hz or lower is
recommended to obtain smoothest overall system re­sponse. Nominal impedance is 8 ohms for the HLS46S-8.
The loudspeaker employs a low-mass 100mm (4 in.)
diameter voice coil of edgewound copper-clad aluminum
ribbon on an aluminum coil form, which operates in a flux
density of 13,600 gauss. The voice coil is driven by a
powerful ferrite magnet, which is supported by a rugged
diecast aluminum frame. The cone suspension is made of
exceptionally high-compliance, damped-cloth surround.

FEATURES

1. Smooth, extended ultra-low-frequency response.

2. High power handling capacity: 600 watts continuous pink
noise (AES Standard).

3. High efficiency and linearity in ultra-low response.

4. Low distortion.

5. Voice coil of edgewound copper-clad aluminum ribbon,

with an aluminum coil form.

6. Powerful ferrite magnet structure.

7. Rigid diecast aluminum construction.

SPECIFICATIONS

Nominal Diameter
Nominal lmpedance
Minimum Impedance

above Fs
Power Handling*
Sensitivity*
Frequency Range
Highest Recommended

Crossover Frequency

Effective Piston Diameter
Displacement Limit (p-p)
Voice Coil Diameter

Voice Coil Material
Voice Coil Insulation
Voice Coil Winding Depth
Top-Plate Thickness
BI Factor
Effective Moving Mass
Flux Density
Polarity

1

2

460mm (18 in.)
8 ohms

7.0 ohms ±10% (25°C)

600 watts continuous pink noise (AES standard)
98dB SPL (1W/1m)
20Hz to 3,000Hz
1,OOOHz

400mm

(16 in.)

40mm (1.6 in.)
100mm (4 in.)
Edgewound copper-clad aluminum ribbon

Aluminum

30mm (1.2 in.)
12mm (0.47 in.)

17.4 N/A

0.145kg
13,600 gauss

Positive voltage on plus (RED) terminal gives
forward diaphragm motion.

THIELE-SMALL PARAMETERS

fs

Re
Qts
Qms
Qes
Vas
Sd
Xmax
Vd

ηο ηο

(half space)
Pe (Max)
MOUNTING DATA
Overall Diameter
Bolt Pattern Diameter
Baffle Cutout Diameter

Depth
Loudspeaker Volume

Weight
Standard Accessories

Notes

1. *1AES Standard IS 60Hz to 600Hz continuous pink noise, at -12dB/Octave cut-off, and with a
6dB crest factor, measured for 2 hours, with the unit suspended in free air.

2

Sensitivity is based on a band-limited (100 to 800Hz) pink noise signal.

2. *

3. Specifications are subject to change without notice.

30Hz

5.5 ohms

0.41

2.5

0.49
430 lit. (15.2 ft3)

2

0.126m

(195 in2)

10.3mm (0.41 in.)
1,294cm3 (79.0 in3)

2.4%
600 watts continuous pink noise

464mm (18.3 in.)
440mm (17.3 in.)
Front Mount: 422mm (16.6 in.)

Rear Mount: 420mm (16.5 in.)
202mm (7.95 in.)
8 lit. (0.28 ft3)

16.5kg (36.4 Ibs.)
Mounting screws, washers and nuts: each 8

APPEARANCE AND DIMENSIONAL DIAGRAM

26”) (0 35’

8 equally spaced at

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS

The low-frequency loudspeaker shall be a TOA Model HLS46S-8 or
approved equivalent. The loudspeaker shall have a 460mm (18 in.)
nominal diameter, with a bolt pattern diameter of 440mm (17.3 in.), a
weight of 16.5kg (36.4 Ibs.), and a depth of 202mm (7.95 in.). The loud­speaker shall have a rigid diecast aluminum frame that shall permit front
or rear mounting. The loudspeaker shall have a 600 watts, AES
Standard power-handling capacity and a uniform frequency response
from 20Hz to 3,000Hz, with a recommended crossover frequency of

1,000Hz or lower to obtain smoothest overall system response.

Band-limited (100 to 800Hz) pink noise sensitivity shall be 98dB (1W/

1m). Nominal impedance shall be 8 ohms. The loudspeaker shall
employ a low-mass 100mm (4 in.) diameter voice coil of edgewound
copper-clad aluminum ribbon of 30mm (1.2 in.) winding depth, on an
aluminum coil form, operating in a flux density of 13,600 gauss. The

voice coil shall be driven by a powerful ferrite magnet. Effective moving
mass shall be 0.145kg. The cone suspension shall be made of
exceptionally high-compliance, damped-cloth surround.

CHARACTERISTIC DIAGRAMS

*Frequency Response and Impedance Curve

FREQUENCY (Hz)

Frequency response is measured in a spherical free-field environment, under 1 watt
& 1 meter conditions, with a swept sine wave signal, while the speaker unit is
mounted in an 200-liter sealed box. The impedanced magnitude curve is measured
while the speaker is suspended in free air, with its cone in the vertical plane

*Distortion Response

Distortion response is measured with a swept sine wave signal, at 60 watts (-10dB
power) & 1 meter, and while the speaker unit is mounted in an 200-liter sealed box

TOA Corporation

FREQUENCY (HZ)

Printed in Japan 833-64-827-90