QSC ISA 280 Manuel De L'utilisateur page 10

Specifications: ISA 280, ISA 450, ISA 750, and ISA 1350
OUTPUT POWER in watts
FTC:
8 ohms, 2 channels driven
(20 Hz - 20 kHz, 0.1% THD)
4 ohms 2 channels driven
(20 Hz - 20 kHz, 0.1% THD)
EIA:
16 ohms, 1 channel driven
(1 kHz, 0.1% THD)
8 ohms, 1 channel driven
(1 kHz, 0.1% THD)
4 ohms, 1 channel driven
(1 kHz, 0.1% THD)
2 ohms, 2 channels driven
(1 kHz, 1.0% THD)
EN
Bridged Mono:
16 ohms
(20 Hz - 20 kHz, 0.1% THD)
8 ohms
(1 kHz, 0.1% THD)
4 ohms
(1 kHz, 1.0% THD)
FREQUENCY RESPONSE
DAMPING FACTOR
INPUT SENSITIVITY
VOLTAGE GAIN
OUTPUT CIRCUIT TYPE
CURRENT CONSUMPTION (Ampere, rms, both channels driven, 120 VAC*)
Idle
1/8 power**, 8 ohms
1/8 power**, 4 ohms
1/8 power**, 2 ohms
* NOTE: for 240 VAC models, multiply all values by 0.5 (one-half).
** NOTE: 1/8 power is representative of typical program material with occasional clipping.
WEIGHT
10
ISA280 ISA 450
185 260
280 400
100 140
200 280
300 450
430 700
370 520
600 900
830 1400
+0.0, -1.0 dB: 20 Hz to 20 kHz (LF filter OFF, at -10 dB from rated power), -3 dB points: 5 Hz and 50 kHz.
>200 at 8 ohm load >200 at 8 ohm load
+3.43 dBu (1.15 Vrms) +2.81 dBu (1.07 Vrms)
30.5 dB (33.4 x) 33.0 dB (44.7 x)
AB AB
0.5 0.5
3.0 3.7
4.5 6.0
6.5 9.3
36 pounds (20.0 kg) 36 pounds (20.0 kg)
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
ISA 750 ISA 1350
450 800
650 1300
250 475
475 850
750 1400
1200 2000
900 1600
1500 2800
2400 4000
>200 at 8 ohm load >250 at 8 ohm load
+2.81 dBu (1.07 Vrms) +4.08 dBu (1.24 Vrms)
35.0 dB (56.2 x) 36.1 dB (64.0x)
H 2-tier H 3-tier
0.6 1.3
4.0 6.2
6.3 9.9
9.2 14.0
47 pounds (25.0 kg) 68 pounds (30.8 kg)