System Specifications
Typical Axial Frequency Response
(swept sine-wave input, 10 feet,
anechoic environment, normalized
for 1 watt, 1 meter into speakers;
see Figure 1):
23- 1,800 Hz
Low-Frequency 3-dB-Down Point,
Normal Tuning (vent cover instaIled for
step-down mode, with equalization):
23
Hz
Alternate Tuning (vent cover
removed, no equalization):
30
Hz
Usable Low-Frequency Limit (10-dB
down point),
Normal Tuning (vent cover installed for
step-down mode with equalization):
20
Hz
Normal Tuning (vent cover installed for
step-down mode, no equalization):
18Hz
Alternate Tuning (vent cover
removed, no equalization):
27 Hz
Sound Pressure Level at 1 Meter,
Maximum Gain and Amplifier at
Clipping Threshold, 0 dBu (0.775 volts
rms) into Balanced Input, Anechoic
Environment, Swept Sine Wave,
l 0 0 - to 8 0 0 - H z Average:
129 dB
50- to 125-Hz Average:
127 dB
Half-Space Reference Efficiency
(transducers):
6.0%
Maximum Long-Term Average Mid-
Band Acoustic Output:
72 watts
Dispersion Angle Included by 6-dB-
Down Points on Polar Responses
(see Figure 3):
Essentially omnidirectional
in
subwoofer range, more directive above
System Distortion, 0.1 Full Power Output,
Second Harmonic (see Figure 5),
100 Hz:
0.9%
Third Harmonic,
100 Hz:
0.4%
Transducer Complement:
Two EVX-180A
Transducer Impedance (nominal/
minimum):
4.0/4.2
ohms
Net Box Volume:
414 liters (14.6 ft3)
Box Tuning Frequency,
Normal fining (vent cover installed
for step-down mode):
26
Hz (as shipped)
Alternate Tuning
(vent cover removed):
30 Hz
Step-Down Peak-Boost Frequency (see
Alternative Vent Tuning and Equaliza-
tion Options section):
26
Hz (as shipped)
Hi-Low-Cut Filter,
Frequency:
15 Hz (as shipped)
Slope:
12
dB (as shipped)
Enclosure Materials and Colors:
Black texture-painted poplar plywood
Amplifier Safety Approvals (in procedure):
UL-8 13; CSA-C22.2; IEC-65
(ENG-0065); EMC
Directive for
European RFI/EMI emissions
Dimensions,
Height:
1.21 m (47.5
in.)
Width:
762
mm (30.0 in.)
Depth:
605
mm (23.8 in.)
Net Weight:
89.6 kg (197.5 lb)
Shipping Weight:
97.6 kg (215.3
lb)
Amplifier (see P1250 documentation for
full specification)
System Output Power, Continuous 4-ohm
load, bridged, l 0 0 - to 130-volt ac line
voltage):
1,200 watts
Power Bandwidth as Used in Bridged
Mode (+0 to -1 dB, reference 1 kHz):
20-20,000
Hz
Frequency Response (-1 dB, reference
1 kHz/l watt):
10-30,000 Hz
Total Harmonic Distortion Plus Noise at
1 kHz (at rated power, measurement
bandwidth 80 kHz):
<O.Ol%
Input,
Type:
True balanced, electronic
Connector:
3-pin
female XLR-type connector wired
according to the IEC 268 standard: pin 1
shield, pin 2 positive, pin 3 negative
Polarity (for positive sound pressure):
Pin 2 positive
Sensitivity (for 1,200-watt,
unclipped output), System Gain
Control Full Clockwise:
0
dBu (0.775 volts)
Impedance:
20 kilohms
Controls and Switches, Rear (see Figure 6
and P1250 Settings section for default
settings):
Limiter time constant; processor; pole
frequency; bridged
mode switch; hi-lo-
cut filter; input routing, parallel or dual;
circuit-to-chassis switch, parallel or dual
Front:
Power on-off switch; indicator LED’s;
two calibrated input level controls
Power Consumption (both channels
operating in dual mode, 1/8 power),
4 Ohms:
660
VA
Input Voltage:
120
V, 50-60 Hz ac
Tolerance of mains voltage:
10%
ac Line Cord:
l4-gauge, three-wire, permanently
attached
power cable
600 Cecil Street, Buchanan, MI 49107
SPEAKERS-Low-Frequency Systems 800/234-6831,
616/695-6831,
Part Number 53343 1-9623
