Toa HNW-500 User manual

TOA SPEAKER COMPONENT
DIVIDING NETWORK
HNW-500/HNW-800
HNW-500 HNW-800
DESCRIPTION
The TOA Model HNW-500 and HNW-800 dividing
networks are designed for use with 2-way speakers in
high-quality professional sound systems where wide range,
high efficiency and faithful reproduction are required.
Ideal applications include studios, theaters, concert halls,
auditoriums and night clubs. The HNW-500 and HNW-800
are intended to be used between a full-range power
amplifier and the loudspeakers.
These dividing networks provide a smooth crossover from
the low frequency loudspeaker to the high frequency driver,
delivering the correct frequency band to each, and
preventing the low frequencies from damaging the high
frequency driver.
The HNW-500 is a full section, dual LC filter having a 500Hz
crossover frequency with 12dB per octave low-pass and
18dB per octave high-pass filter slopes. It will handle 300
watts of broad-band continuous pink noise. It has an input
impedance of 8 ohms, with 4-ohm low frequency and 8-ohm
high frequency output impedances.
The HNW-800 is a full section, dual LC filter having a 800Hz
crossover frequency with 12dB per octave high- and
low-pass filter slopes. It will handle 150 watts of
broad-band continuous pink noise. It has an input
impedance of 8 ohms, with low/high frequency output
impedances of 8 ohms in each band pass. In both the
HNW-500 and HNW-800, overall characteristics are
minimally affected by normal variations in load impedance.
Both dividing networks employ a high frequency level
control which allows a ±2dB variation in level.
FEATURES
1. The TOA HNW-500 and HNW-800 are designed for use
in permanent installations, optimally matched to the
following standard speaker system combinations.
HNW-500: SB-38S speaker system with LE-940 horn and
HFD-260 compression driver; or SB-38W
speaker system with LE-M94 horn and
HFD-260 compression driver.
HNW-800: SB-38S, SB-30W or SB-30S speaker system
with LE-M94 and HFD-220 compression
driver.
2. A system selection circuit is provided to obtain optimal
crossover characteristics in the matching speakers.
3. A high frequency level control allows variations of ±2dB
from normal levels in the high frequencies.
4. Horn equalization is provided to correct high frequency
roll-off for a compression driver equipped with a constant
directivity horn.
5. Both dividing networks have 12dB per octave low-pass
filter slope rates, with high-pass filter slope rates of
18dB per octave for the HNW-500, and 12dB per octave
for the HNW-800.
6. The HNW-500 and HNW-800 face plates are designed to
replace the input panels on the SB-46S, SB-38S,
SB-38W, SB-30S, SB-30W low frequency enclosures.

SPECIFICATIONS
Model No.
PowerHandlingCapacity
ContinuousPinkNoise
HNW-500
300 watts (4 ohms)
Load Impedance
LowFrequency
HighFrequency
CrossoverFrequency
4 ohms
8 ohms
500Hz
Slope Rate
LowFrequency
HighFrequency
High Frequency Level Control
Dimensions
Weight
12dB/oct
18dB/oct
Three steps (+2dB, normal, -2dB)
178(W) x 218(H) x 75(D)mm
7.01(W) x 8.58(H) x 2.95 (D) inches
1.7 kg (3.75 Ibs.)
Color
Black
APPEARANCE AND DIMENSIONAL DIAGRAMS ARCHITECT’S AND ENGINEER’S
•HNW-500 •HNW-800
SPECIFICATIONS
CHARACTERISTIC DIAGRAMS
Frequency Response
•HNW-500
20 50100200
Frequency (Hz)
•HNW-800
-40
20 50100200 500
Frequency (Hz)
_____System selection: Install between terminal Nos. 3 and 4
...........System selectIon: Jumper not installed
Note that the three identical curves indicate +2, 0 and -2 settings
Model No. HNW-800
Power Handling Capacity
ContinuousPinkNoise 150 watts (8 ohms)
Load Impedance
LowFrequency
High Frequency
8 ohms
8 ohms
CrossoverFrequency 800Hz
Slope Rate
Low Frequency
HighFrequency
12dB/oct
12dB/oct
High Frequency Level Control Three steps (+2dB, normal, -2dB)
Dimensions 178(W) x 218(H) x 80(D)mm
7.01 (W) x 8.58 (H) x 3.15 (D) inches
Weight
Color 1.6 kg (3.53 Ibs.) Black
*Specifications are subject to change without notice.
TOA HNW-500:
The dividing network shall be a TOA Model HNW-500 with 500Hz
crossover frequency for the matching TOA SB-38S speaker system with
LE-940 horn and HFD-260 compression driver; or SB-38W speaker system
with LE-M94 horn and HFD-260 compression driver, or an approved
equivalent. The network shall be a full section, dual LC filter, with 12dB
per octave high & 18dB per octave low frequency roll-off, 8-ohm input and
4-/8-ohm output impedances. A three-step high frequency level control
with settings for +2dB, Normal and -2dB shall be provided. Horn
equalization shall be provided to correct high frequency roll-off when the
network is linked to a compression driver with a constant directivity horn.
The face plate shall be designed for easy mounting in TOA enclosures’
input panel cut-outs.
TOA HNW-800:
The dividing network shall be a TOA Model HNW-800 with 800Hz
crossover frequency for the matching TOA SB-38S, SB-30W or SB-30S
speaker system with the LE-M94 horn and HFD-220 compression driver, or
an approved equivalent. The network shall be a full section, dual LC filter,
with 12dB per octave high & low frequency roll-off, 8-ohm input and 8-ohm
high/low output impedances. A three-step high frequency level control
with settings for +2dB, Normal and -2dB shall be provided. Horn
equalization shall be provided to correct high frequency roll-off when the
network is linked to a compression driver with a constant directivity horn.
The face plate shall be designed for easy mounting in TOA enclosures’
input panel cut-outs.
TOA Corporation
Printed in Japan 833-64-821-10