SPECIFICATIONS
ISA 280
ISA 450
ISA 750
OUTPUT POWER
in watts
FTC:
8 ohms per channel (20-20k Hz., 0.1% THD)
185
260
450
4 ohms per channel (20-20k Hz., 0.1% THD)
280
425
650
EIA:
16 ohms (1 kHz., 0.1% THD, 1 channel driven)
100
140
250
8 ohms (1 kHz, 0.1% THD, 1 channel driven)
200
280
475
4 ohms (1 kHz, 0.1% THD, 1 channel driven)
300
500
750
2 ohms (1 kHz, 1% THD, both channels driven)
430
700
1200
Bridged Mono:
16 ohms, 20–20k Hz, 0.1% THD
370
520
900
8 ohms (1 kHz, 0.1% THD)
600
900
1500
4 ohms (1 kHz, 1% THD)
830
1400
2400
DYNAMIC HEADROOM
(all models)
2 dB at 4 ohms
DISTORTION
(SMPTE-IM, all models)
LESS THAN 0.01% LESS THAN 0.01% LESS THAN 0.01%
FREQUENCY RESPONSE
(all models)
20 Hz to 20 kHz, +0, -1 dB
(at 10 dB below rated output power)
-3 dB points: 5 Hz and 50 kHz
DAMPING FACTOR
(all models)
Greater than >200 for 8 ohm load
SIGNAL to NOISE
(unweighted, 20-20k Hz.)
-100 dB -100 dB -100 dB
VOLTAGE GAIN
(gain control set to 0 dB)
30.5 dB (33.4.X)
33.0 dB (44.7 X)
35.0 dB (56.2 X)
INPUT SENSITIVITY
for rated power into 8 ohms
+3.43 dBu (1.15 Vrms)
+2.81 dBu (1.07 Vrms) +2.81 dBu (1.07 Vrms)
INPUT CLIPPING, Vrms
(all models)
+22 dBu
INPUT IMPEDANCE
(all models)
10k ohms unbalanced , 20k ohms balanced
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