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SPECIFICATIONS
Enclosure
Vented (bass reflex) type
Crossover Frequencies
1 kHz, 8 kHz
Crossover Slope
1 kHz; 18 dB/Oct.
8 kHz: 12 dB/Oct.
Speakers
Low Frequency
12 " woofer, 2.83 " (72 mm) edge-wound
copper ribbon voice coil, Aluminum diecast
Mid and High Frequencies
Level Controls
0 to -10 dB (with an “OFF” position)
Mid Frequency
High Frequency
construction
CD horn plus compression driver. duralumin
diaphragm
Horn tweeter, duralumin diaphragm
Input Terminals
Two 1/4 " phone jacks and screw type, both for
full-range
Power Handling Capacity
Continuous Pink Noise
Continuous Program
120 watts RMS of band-limited pink noise
(50 Hz to 20 kHz, 24 Hours)
360
watts
Enclosure Materials
and Finish
Midium Density Fiber board, Polyester in
gray color
Dimensions
25.0 (H) x 15.3 (W) x 13.7 (D) inches
636 (H) x 388 (W) x 347 (D) mm
Nominal Impedance
Sensitivity
8 ohms
100 dB (1W/1 m, Band-limited pink noise,
250 Hz to 2.5 kHz)
Weight
61.7 Ibs (28 kg)
Standard Accessories
Optional Accessories
8 rubber pieces for T-nut holes
HY-30, HY31 Ceiling Mounting Bracket
Frequency Response
70 Hz to 20 kHz
Box Tuning Frequencv
62 Hz
*Specifications are subject to change without notice
APPEARANCE AND DIMENSIONAL DIAGRAM
OPTION
HV-30 Adjustable Ceiling Mount Bracket for Use
with the HY-31
*Mounting angle is adjustable 360° horizontal and ± 10
o
vertical 40° angle shown in the figure.
j
Ceiling Mount Bracket
k
Speaker Mount Bracket
l
Vertical Adjustment Bolts
m
Horizontal Adjustment Nut
n
Safety Bolt
j
Enclosure
k
Woofer
l
Mid-range (CD Horn)
m
Tweeter
n
High frequency level control
o
Mid frequency level control
p
Input panel
q
Mounting nuts
r
Punched metal grille
INPUT PANEL
HY-31 Mount Bracket for Use with HY-30
* T-nuts for ceiling suspension are provided on the rear slant
and both sides of the SF-30 enclosure, permitting it to be
readily suspended from the ceiling when used with the
HY30 and HY31.
Screw
terminal
The screw type terminals are connected in parallel with the
1/4 " phone jacks. Two 1/4 " phone jacks can be converted
into XLR connectors by removing mounting panel and
installing XLR connector.
LEVEL CONTROLS
MID FREQUENCY LEVEL CONTROL
FREQUENCY LEVEL CONTROL
Separate level controls are provided for mid and high
frequencies.
Make the level setting according to the environmental
conditions, although almost flat frequency response is
obtainable as long as the level controls remain within the
“NORMAL” ranges.