9
ART300A Service Manual
Specifi cations
System:
Freq. Range (–10 dB):
55Hz-19kHz
Freq. Response (±3 dB):
75Hz-16kHz
Horz. Coverage Angle (–6 dB):
90°, averaged 1kHz-10kHz
Vert. Coverage Angle (–6 dB):
70°, averaged 1kHz-10kHz
Directivity Factor Q (DI):
10.0 (10.0), averaged 1kHz-10kHz
System Sensitivity
1
:
101 dB, 1W@1m
Rated Maximum SPL
2
:
126 dB @ 1 m (3.3ft) peak
HF Protection:
Dynamic
Transducers:
Low Frequency:
12" (300 mm) diameter woofer
High Frequency:
1" (25 mm) compression driver, horn loaded
Preamp and Processor:
Input Sensitivity:
Mic In: 8mV
Line In: 125mV
Input Impedance:
Mic In: 650
Ω
unbalanced
1.3k
Ω
balanced
Line In: 10k
Ω
unbalanced
19k
Ω
balanced
Crossover Frequency and Slope:
1.8kHz; 24 dB/octave
Time Alignment:
Analog, 0.3 ms HF delay
Speaker Protection:
Thermal, over-excursion
Music Equalization:
+4.3 dB @ 65Hz
+4.0 dB @ 12kHz
Voice Equalization:
+4.0 dB @ 3kHz
+4.0 dB @ 6kHz
Indicators:
Power ON, Limiter
Amplifi ers:
LF Amplifi er Power:
300 watts RMS
HF Amplifi er Power:
60 watts RMS
Distortion:
< 0.1% THD at rated power
Amp Protection:
Thermal, limiter, short circuit
Power Supply:
115/230 VAC, 2A, 50/60 Hz
Physical:
Enclosure:
Asymmetrical trapezoidal, reinforced
polypropylene
Mounting:
Lockable 1-3/8" (35mm) stand mount
Rigging Inserts:
4 points, accepts M10 threaded hardware
Input/Output Connectors:
2 XLR balanced
Dimensions HxWxD:
24.4" x 15.4" x 12.3"
(620 mm x 390 mm x 312 mm)
Net Weight:
44.0 lb (20.0 kg)
Testing:
DC voltages:
+ 83 VDC
- 83 VDC
+ 41 VDC
- 41 VDC
+ 15 VDC
- 15 VDC
DC offset:
less than +/- 0.1 VDC
Bias:
At idle, into 8 ohm loads
after warm-up
adjust R36
5.5 mV R39-R40 (low freq amplifi er)
adjust R73
13 mV R81-R82 (high freq amplifi er)
AC current draw:
Less than 0.3 A at idle