QSC ISA280 - Page 2

ISA280 ISA450 ISA750 ISA1350 ISA300Ti ISA500Ti ISA800Ti
Stereo Mode (both channels driven) Continuous average output power per channel
8Ω / 20 Hz – 20 kHz / 0.1% THD 185 W 260 W 450 W 800 W 185 W 260 W 450 W
4Ω / 20 Hz – 20 kHz / 0.1% THD 280 W 425 W 650 W 1300 W 280 W 425 W 650 W
2Ω / 1 kHz / 1% THD 430 W 700 W 1200 W 2000 W 430 W 700 W 1200 W
Direct Ouput, Stereo Mode
70V / 20 Hz – 20 kHz / +0,-0.3 dB / 0.5% THD − − − 1500 W − − −
XF Output Power, Stereo Mode
70V or 100V / 50 Hz – 16 kHz / 0.5% THD − − − − 300 W 500 W 800 W
25V / 50 Hz – 16 kHz / 0.5% THD − − − − 200 W 300 W 500 W
Bridge-Mono Mode Continuous average output power
8Ω / 1 kHz / 0.1% THD 600 W 900 W 1500 W 2800 W 600 W 900 W 1500 W
4Ω / 1 kHz / 1% THD 830 W 1400 W 2400 W 4000 W 830 W 1400 W 2400 W
XF Output Power, Bridge Mono Mode
140V or 200V / 50Hz – 16 kHz / 0.5% THD − − − − 600 W 1000 W 1600 W
Signal to Noise (20 Hz – 20 kHz) 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB
Distortion (SMPTE-IM) < 0.01% < 0.01% < 0.02% < 0.01% < 0.01% < 0.01% < 0.02%
Input Sensitivity at 8Ω 1.15V (+3.4 dBU) 1.07V (+2.8 dBU) 1.07V (+2.8 dBU) 1.24V (+4.1 dBU) 1.15V (+3.4 dBU) 1.07V (+2.8 dBU) 1.07V (+2.8 dBU)
Gain at 8Ω 33.4x (30.5 dB) 44.7x (33 dB) 56.2x (35 dB) 64.0x (36.1 dB) 33.4x (30.5 dB) 44.7x (33 dB) 56.2x (35 dB)
Output Circuitry Class AB Class AB 2-tier Class H 3-tier Class H Class AB Class AB 2-tier Class H
Distortion (typical)
20 Hz – 20 kHz: 10 dB below rated power < 0.03% THD / 4Ω and 8Ω
1.0 kHz and below: full rated power < 0.03% THD / 4Ω and 8Ω
Frequency Response (10 dB below rated ouput power) ISA280, ISA450, ISA750 and ISA1350: 20 Hz – 20 kHz, +0/-1 dB | -3 dB points, 5 Hz and 50 kHz
ISA300Ti, ISA500Ti, ISA800Ti Direct outputs: -3 dB at 50 Hz, -0.5 dB at 20 kHz XF outputs: 50 Hz – 16 kHz, +0/-3 dB
Damping Factor (direct outputs) > 200 at 8Ω / ISA1350: > 250
Output Regulation (isolated outputs) < 1.5 dB
Input Impedance 10k ohms unbalanced, 20k ohms balanced
Input Clipping 10 Vrms (+22 dBu) / ISA1350: 4.53 Vrms (+15.3 dBu)
Cooling Continuously variable speed fan, back-to-front air flow
Connectors 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 & 2 gain knobs / 10-position DIP switch
Indicators Power-On: Green LED | Signal: Green LED (1 per channel) | Protect: Red LED (ISA 1350) | Clip: Red LED (1 per channel)
Amplifier Protection Full short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection On/off muting
Triac crowbar: ISA750, ISA1350 and ISA800Ti
AC coupling: ISA280, ISA300Ti, ISA450, ISA500Ti
Dimensions (HWD) 5.25" (13.3 cm) 3 RU x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep from front mounting rails
Weight
Net 36 lb (16.3 kg) 42 lb (19 kg) 47 lb (21.3 kg) 68 lb (30.8 kg) 44 lb (20.0 kg) 49 lb (22.3 kg) 57 lb (26 kg)
Shipping 42 lb (19.1 kg) 48 lb (22 kg) 53 lb (24.0 kg) 77 lb (34.4 kg) 50 lb (22.7 kg) 55 lb (25 kg) 63 lb (28.6 kg)
Power Requirements 100, 120, 230 VAC, 50 – 60 Hz
ISA Series
Specifications
qscaudio.com
Specifications subject to change without notice.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
ISA Series Spec Sheet - 06/05/08
QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and other countries. THX is a trademark of THX Ltd.
All other trademarks are the property of their respective owners. Patents may apply or be pending.