QSC ISA-750 ISA Series Amplifier
ISA SPECIFICATIONS ISA750
8 ohms 20 Hz-20 kHz 0.1% THD
- 450W
4 ohms 20 Hz-20 kHz 0.1% THD
- 650W
2 ohms 1 kHz 1% THD
- 1200W
8 ohms 1 kHz 0.1% THD
- 1500W
4 ohms 1 kHz 1% THD
- 2400W
Signal to Noise (20 Hz-20 kHz)
- 100 dB
Distortion (SMPTE-IM)
- Less than 0.02%
Input Sensitivity @ 8 ohms
- 1.07v(+2.8 dBu)
Voltage Gain @ 8 ohms
- 56.2x(35 dB)
Output Circuitry
- Class H
Weight - Net
- 47 lbs(21.3 kg)
Weight - Shipping
- 53 lbs(24.0 kg)
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power
1.0 kHz and below: full rated power .
Less than 0.03% THD, 4 ohms and 8 ohms
Less than 0.03% THD, 4 ohms and 8 ohms
Frequency Response
- 10 dB below rated output power
ISA 280, 450, and 750 and 1350: 20 Hz20 kHz, +0/-1 dB; -3 dB points: 5 Hz and
50 kHz ISA 300Ti, 500Ti and 800Ti:
Direct outputs: -3 dB @ 50 Hz, -0.5 dB @ 20 kHz; XF outputs: 50 Hz16 kHz, +0/-3 dB
Damping Factor (direct outputs)
- Greater than 200 at 8 ohms, ISA 1350 greater than 250
Output Regulation (isolated outputs)
- Less than 1.5 dB
Input Impedance
- 10 k ohms unbalanced, 20 k ohms balanced
Input Clipping
- 10 Vrms (+22 dBu)
Cooling
- Continuously variable speed fan, back-to-front air flow
Connectors, each channel
- Input: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+)
Output: Covered barrier strips
DataPort V2: HD-15 connector
Controls
- Front: AC switch
Rear: Ch. 1 and Ch. 2 gain knobs, 10-position DIP switch
Indicators
- PWR-ON: Green LED; SIGNAL: Green LED (1 per channel);
CLIP: Red LED (1 per channel)
Dimensions
- 19 (48.3 cm) rack mounting, 5.25(13.3cm) tall (3 rack spaces),
15.9 (40 cm) deep (from front mounting rails)
Amplifier
- Protection Full short circuit, open circuit, thermal, ultrasonic, and RF protection;
Stable into reactive or mismatched loads
Power Requirements
- 120, 230, VAC, 50-60 Hz
Load Protection
- On/off muting; Triac crowbar: ISA 750,
1350 and 800Ti; AC coupling: ISA 280, 300Ti, 450 and 500Ti