Toa SB-38W User manual
TOA SPEAKER COMPONENT
LOW-FREQUENCY ENCLOSURE
SB-38W
DESCRIPTION
The TOA SB-38W is a vented, bass-reflex, low-frequency
enclosure for permanent speaker-system installations.
It serves as a low-frequency enclosure for two HLS38UL-8
woofers. It may be used in multi-amp systems employing
the TOA SAORI for optimal time alignment, phase
programs, equalization and channel divider functions.
The optional HNW-500 dividing network should be used
when operating the speaker system passively. The
optional HY-700 suspension kit may be mounted in the
SB-38W before the woofers are installed, and the LE-M94
or LE-940 may be attached with the HY-M94 or HY-940
horn mounting bracket. A large screw terminal input
panel ensures safe and solid connections. The enclosure
comes with a protective punched-metal grille and a
leatherette finish.
FEATURES
1. Low-frequency, vented (bass-reflex) enclosure for fixed
installations.
2. Two HLS38UL-8 woofers may be installed to produce a
woofer system that is highly efficient in reproducing the
low-frequency range. Box tuning frequency (fb) is 45Hz.
3. Creates a wide-range, highly efficient speaker system
when used in conjunction with the LE Series horn, an
HFD Series compression driver and two HLS38UL-8
woofers.
4. SB-38W may be suspended by using the optional HY-700
suspension kit.
5. Speaker system configuration allows for easy mounting
of LE-M94/LE-940 to the enclosure with the optional
HY-M94 or HY-940 horn mounting bracket.
6. Large, screw terminal, barrier-strip input panel.
7. Optional HNW-500 cross-over network with HF
equalization can be mounted in the supplied input panel
opening.
8. Protective punched-metal grille.
9. Leatherette finish.
SPECIFICATIONS
Enclosure
Box Tuning Frequency
ApplicableSpeakerUnit
Input Terminal
Material
Finish
Dimensions
Weight
Vented(bass-reflex)type
45Hz
HLS38UL-8 x 2
2Pscrew-terminal,barrier-strip(M5)
Particleboard
Leatherettedarkgray
580(W) x 1,000(H) x 480(D) mm
22.8(W) x 39.4(H) x 18.9(D) inches
39kg (86 Ibs.)
*Specifications are subject to change without notice.
APPEARANCE AND DIMENSIONAL DIAGRAM
580 (22.8) 480 (18.9)
Unit; mm (inch)
OPTIONAL ACCESSORIES
HY-700
Suspension Kit
HY-M94
LE-M94 CD Horn
Mounting
Bracket
HY-940
LE-940 CD Horn Mounting Bracket
ARCHITECT’S AND ENGINEER’S
SPECIFICATIONS
The low-frequency enclosure shall be a TOA SB-38W or approved
equivalent. The enclosure shall be a vented, bass-reflex low-frequency
unit intended for permanent speaker system installations. It shall serve
as a low-frequency enclosure for two HLS38UL-8 woofer units. Box
tuning frequency (fb) shall be 45Hz. When installation with a suspended
SB-38W is required, the optional HY-700 suspension kit shall be
mounted to the SB-38W before the woofers are installed. The LE-M94 or
LE-940 may be attached with the HY-M94 or HY-940 horn mounting
bracket. A large barrier-strip input panel shall ensure safe and solid
connections. Dimensions shall be 1000(H) x 580(W) x 480(D)mm
(39.4(H) x 22.8(W) x 18.9(D) in.). Weight shall be 39kg (86 lb.), for the
enclosure. The enclosure shall be of particle board and shall come with
a protective punched-metal grille and a leatherette finish.
INSTALLATION EXAMPLES
The SB-38W is an enclosure for reproducing low-
frequencies. A high-efficiency low-frequency speaker
system can be created by adding two HLS38UL-8
woofers. A high-level, wide range two-way speaker
system can be configured by adding TOA’s LE Series
constant directivity horns and HFD Series compression
drivers. When driving the speaker system with multi-
amplifier operation, the time alignment, phase program,
equalization and channel divider functions can be set to
their optimum performance conditions by using the TOA
SAORI integrated sound processor, When driving the
speaker system in passive operation, use the optional
HNW-500 dividing network.
Installing the Low-Frequency Loudspeakers
1. Detach the protective punched-metal grille.
2. Connect the cables to the speakers.
3. Mount each speaker unit in the enclosure and tighten the screws at
the 8 locations. Use the screws provided with the speaker.
4. Mount the protective punched-metal grille to the enclosure and tighten
the screws at the 13 locations.
Suspending the Enclosure
Before installing the speakers, mount the HY-700 suspension kit in the
enclosure. For details, refer to the HY-700’s instruction manual.
When suspending this speaker system, be sure to investigate the
structure of the installation location, and confirm that it is adequate for
the weight of the components in the system.
Mounting Horns
When the speaker system is assembled, the LE-M94/LE-940
constant directivity horn is attached to the SB-38W with the HY-M94/
HY-940 horn mounting bracket. For details, refer to the HY-M94/
HY-940’s instruction manual.
Installing the Dividing Network
When using the HNW-500 dividing network, remove the input panel at
the back of the enclosure and mount the HNW-500 dividing network in
its opening. For details, refer to the HNW-500’s instruction manual.
Free-Standing Enclosure
If necessary, attach the provided rubber feet to the four locations at the
bottom of the enclosure for free-standing installation.
CHARACTERISTIC DIAGRAMS
(Assembled with two HLS38UL-8 Low-frequency Loudspeaders)
ll
Frequency Response and Impedance Curve
ll
Harmonic Distortion
70
2000 5000
50
500
FREQUENCY (Hz) FREQUENCY (HZ)
‘Measured in an anechoic environment referenced to 1 watt at 1 meter. *Measured at 100 watts (-10dB power), 1 meter reference distance
ll
Coverage Angle vs Frequency (-6dB)
l
Directivity Factor (Q) vs Frequency
120
80
I
I
I
I
I I
I
50
200 500
1000 MOO
5000 10000
Frequency(Hz)
Horizontal
Vertical
ll
Polar Response (1/3 Octave Pink Noise)
Horizontal ------- Vertical
90
270
2OOHz
250Hz 315Hz 400Hz
180 180
500Hz 630Hz 800Hz
1OOOHz
TOA Corporation
Printed in Japan 833-64-528-10
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