ISA280 - Amplificateur audio QSC AUDIO - Notice d'utilisation et mode d'emploi gratuit
Retrouvez gratuitement la notice de l'appareil ISA280 QSC AUDIO au format PDF.
| Type de produit | Amplificateur de puissance |
| Caractéristiques techniques principales | 2 canaux, 280W par canal à 4 ohms |
| Alimentation électrique | 230V AC, 50/60 Hz |
| Dimensions approximatives | 48.3 x 43.2 x 8.9 cm |
| Poids | 8.2 kg |
| Compatibilités | Compatible avec divers systèmes de sonorisation |
| Fonctions principales | Amplification audio, protection contre les surcharges, contrôle de gain |
| Entretien et nettoyage | Nettoyer avec un chiffon doux, éviter l'humidité |
| Pièces détachées et réparabilité | Disponibilité de pièces de rechange, service après-vente recommandé |
| Sécurité | Protection contre les courts-circuits, surchauffe et surcharge |
| Informations générales utiles | Idéal pour les concerts, événements en direct et installations fixes |
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Téléchargez la notice de votre Amplificateur audio au format PDF gratuitement ! Retrouvez votre notice ISA280 - QSC AUDIO et reprennez votre appareil électronique en main. Sur cette page sont publiés tous les documents nécessaires à l'utilisation de votre appareil ISA280 de la marque QSC AUDIO.
MODE D'EMPLOI ISA280 QSC AUDIO


The ISA Installed System Amplifiers are designed to meet the needs of sound system designers and contractors worldwide. Three models feature isolated 25, 70, and 100 volt outputs for distributed sound systems, while four low-impedance models are rated for 2 ohm operation. The ISA 1350 drives 70 volt lines directly with 1500 watts per channel. Versatile loading options and a comprehensive set of features make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.
ISA Power Amplifiers
| Model | 70V* | Watts per channel | ||
| 8Ω** | 4Ω** | 2Ω† | ||
| ISA280 | - | 185 | 280 | 430 |
| ISA450 | - | 260 | 425 | 700 |
| ISA750 | - | 450 | 650 | 1200 |
| ISA1350 | 1500†† | 800 | 1300 | 2000 |
| ISA300Ti | 300 | 185 | 280 | 430 |
| ISA500Ti | 500 | 260 | 425 | 700 |
| ISA800Ti | 800 | 450 | 650 | 1200 |
- 50 Hz - 16 kHz, 0.5% THD
** 20 Hz - 20 kHz, 0.1% THD
1kHz,1% THD
† Direct Output, 70V, less than 0.5% THD, 20 - 20 kHz
Features
- Four models for low-impedance applications
- ISA1350 drives 70 volt lines directly with 1500 watts per channel
- Three "Ti" versions include low-impedance and isolated 25, 70, and 100 volt outputs for distributed audio systems
- ISA450 and ISA750: THX™ approved for professional cinema applications
- Rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings
- XLR and detachable Euro-style input connectors
- DataPort V2 for use with DPV2 compatible signal processing accessories (XC-3, SF-3, LF-3) and DSP-3/DSP-4 (with external power supply)
- Independent defeatable clip limiters for reduced distortion
- Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (30 Hz or 70 Hz on non-"Ti" models, 50 Hz or 75 Hz on "Ti" models)
Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 40% on ISA750 and ISA800Ti, and by 50% on ISA1350 - Front panel indicators include power, signal, and clip (and protect on ISA1350)
Covered barrier strip output connectors for safety agency compliance - Automatic variable-speed fan for quiet normal operation with maximum cooling on demand
- Rear-to-front air flow keeps equipment racks cool
- Stereo, bridge, or parallel operating modes
- Comprehensive protection circuitry including DC, infrasonic, thermal overload, and short circuit protection
- 3-year warranty plus optional 3-year extended service contract
"Ti" Models
- Isolated 25, 70, 100 volt, and low-impedance outputs available simultaneously
- Simple barrier strip connection determines output mode
"Ti" models have fully isolated 25, 70, and 100 volt outputs
| 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 Output, 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 output 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 | ||||||
Specifications subject to change without notice.