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.
