QSC ISA750 2 channels, 450 watts/ch at 8Ω, 650 watts/ch at 4Ω, 1200 watts/ch at 2Ω
Vendor: QSC
Description QSC ISA750 2 channels, 450 watts/ch at 8Ω, 650 watts/ch at 4Ω, 1200 watts/ch at 2Ω The QSC ISA750 is, one of the ISA Installed System Amplifiers, professionally designed to meet the needs of the...
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QSC ISA750 2 channels, 450 watts/ch at 8Ω, 650 watts/ch at 4Ω, 1200 watts/ch at 2Ω
The QSC ISA750 is, one of the ISA Installed System Amplifiers, professionally designed to meet the needs of the system contractors and designer all around the world. In this ISA system there are three models that features isolated 25, 70, and 100 volt outputs for distributed sound systems, while four low impedance models are rated for 2 ohm operation. The ISA Series is a rugged and cost-effective power solution, because of its comprehensive set of features and versatile loading options, for any permanently installed sound system. It is the QSC ISA750 2 channels, 450 watts/ch at 8Ω, 650 watts/ch at 4Ω, 1200 watts/ch at 2Ω.
Features
- Rear panel gain controls for tamper resistance; 2-dB detents allow 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
- Two-tier Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 40%
- Selectable high-pass filters (30 Hz or 70 Hz) protect speakers and prevent speaker transformer saturation with minimal effect on program material
- Front panel LED indicators include power, signal, and clip
- Covered barrier strip output connectors for safety agency compliance
- Automatic on-demand variable-speed fan: quiet normal operation, with maximum cooling when needed
- Rear-to-front air flow helps keep 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
SPECIFICATIONS | ISA750 | ||||||
OUTPUT POWER PER CHANNEL, STEREO MODE, both channels driven | |||||||
8Ω, 20 Hz–20 kHz 0.1% THD 4Ω, 20 Hz–20 kHz 0.1% THD 2Ω 1 kHz 1% THD |
450 W 650 W 1200 W |
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DIRECT POWER PER CHANNEL, STEREO MODE | |||||||
70V, 20 Hz–20 kHz +0/-0.3 dB 0.5% THD | - | ||||||
TRANSFORMER-ISOLATED OUTPUT POWER PER CHANNEL, STEREO MODE | |||||||
70V or 100V, 50 Hz–16 kHz 0.5% THD 25V, 50 Hz–16 kHz 0.5% THD |
- - |
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OUTPUT POWER, BRIDGED MONO MODE | |||||||
8Ω, 1 kHz 0.1% THD 4Ω 1 kHz 1% THD |
1500 W 2400 W |
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TRANSFORMER-ISOLATED OUTPUT POWER, BRIDGED MONO MODE | |||||||
140V or 200V, 50 Hz-16 kHz 0.5% THD | - | ||||||
Signal to Noise (20 Hz-20 kHz) | 100 dB | ||||||
Distortion (SMPTE-IM) | Less than 0.02% | ||||||
Input Sensitivity @ 8 ohms | 1.07 V (+2.8 dBu) |
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Maximum Voltage Gain | 56.2× (35 dB) |
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Output Circuitry | Class H, 2 tier | ||||||
THX Approved | Yes | ||||||
Weight - Net | 47 lb (21.3 kg) |
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Weight - Shipping | 53 lb (24.0 kg) |
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ALL MODELS | |||||||
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 |
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Frequency Response 10 dB below rated output power |
ISA 280, 450, 750 and 1350: 20 Hz–20 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 Hz–16 kHz, +1/-3 dB |
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Damping Factor with 8Ω Load (direct outputs) | Greater than 200; ISA 1350 greater than 250 | ||||||
Output Regulation (isolated outputs) | Less than 1.5 dB | ||||||
Input Impedance | 10 kΩ unbalanced, 20 kΩ balanced | ||||||
Input Clipping | 10 V rms (+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 |
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Controls | Front: AC switch Rear: Ch. 1 and Ch. 2 gain knobs, 10-position DIP switch |
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Indicators | PWR-ON: Green LED; SIGNAL: Green LED (1 per channel); CLIP: Red LED (1 per channel) |
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Dimensions (HWD) inches | 5.25 x 19 x 15.9 / 3RU | ||||||
Dimensions (HWD) mm | 133 x 483 x 400 / 3RU | ||||||
Amplifier Protection | Full short circuit, open circuit, thermal, ultrasonic, and RF protection; Stable into reactive or mismatched loads |
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Power Requirements | 120 or 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 |
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