User Manual ISA Audio Power Amplifiers ISA 300T, ISA 500T, ISA 800T, ISA 280, ISA 450, ISA 750

SPECIFICATIONS ISA 300T ISA 500T ISA 800T
OUTPUT POWER in watts
Low Impedance 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
Low Impedance 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
Low Impedance 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
Distributed High Impedance:
70 volt (50 Hz - 16 kHz, 0.5% THD, per channel) 300 500 800
100 volt 300 500 800
140 volt (bridge) 600 1000 1600
200 volt (bridge) 600 1000 1600
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 “T” models) DIRECT OUTPUTS- -3 dB at 50 Hz to -0.5 dB at 20 kHz
(at 10 dB below rated output power) DISTRIBUTED OUTPUTS- 50 Hz to 16 kHz, +0 dB, -3 dB
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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